After draining a pool, the next step is to clean it, inspect it for damage, and get it ready before filling it again. Acting quickly is important because leaving an empty pool for too long can lead to cracks or other problems.
Start by removing leaves, dirt, and any leftover water from the bottom. Scrub the walls and floor with a pool brush and a cleaner made for your pool surface. This helps remove stains, algae, and mineral buildup.
Once the pool is clean, look closely for cracks, chipped plaster, loose tiles, or damaged fittings. Small problems are much easier and cheaper to fix before the pool is full of water again. If you notice major damage, consider calling a pool professional.
Next, check the pool equipment. Make sure the pump, filter, skimmer, and drain covers are clean and in good shape. Replace worn parts if needed so everything works well when the pool is back in use.
When you are ready, begin refilling the pool with fresh water. As it fills, keep an eye on the water level and avoid stopping halfway unless necessary. After the pool is full, test the water and adjust the chemicals until the balance is right. Once everything is clean and balanced, your pool is ready for a safe and enjoyable swim.
Why You Might Need to Drain a Pool
Most people do not drain a pool very often. In fact, many pools can go for years without being completely emptied. However, there are times when draining the pool is the best choice. Knowing why a pool needs to be drained helps you decide if it is the right solution for your situation.
One common reason is that the water has become too dirty or has a very high level of total dissolved solids (TDS). Over time, minerals, salt, sunscreen, body oils, and pool chemicals build up in the water. Once these materials reach high levels, adding more chemicals may not solve the problem. Fresh water can make the pool much easier to maintain.
Another reason is a serious algae problem. If algae have taken over the pool and keep coming back even after shocking the water, draining the pool may be the fastest way to start fresh. Cleaning the empty pool removes algae that may be hiding in small cracks or rough surfaces.
Many homeowners also drain their pool before making repairs. Small cracks, chipped plaster, broken tiles, damaged lights, or worn fittings are much easier to fix when there is no water in the pool. If you plan to resurface the pool, it must be drained first so the new finish can be applied properly.
Some people drain their pool to give it a deep cleaning. Dirt, calcium deposits, rust stains, and algae stains can stick to the walls and floor over time. These stains are much easier to remove when the pool is empty. A thorough cleaning can make an older pool look much newer.
Sometimes the water becomes contaminated after flooding, construction work, or another unexpected event. In these cases, replacing the old water with fresh water is often the safest option. Starting with clean water also makes balancing the pool chemicals much easier.
Even though draining a pool can be helpful, it is not something you should do unless it is really needed. An empty pool can be damaged if it stays dry for too long, especially during very hot weather or after heavy rain. Some pools can even lift out of the ground if groundwater pressure becomes too high. That is why many pool experts recommend draining a pool only when necessary and following the proper steps from start to finish.
Before you drain your pool, make sure you know why you are doing it and have a plan for what comes next. A little preparation can save time, money, and prevent expensive repairs later.
Inspect the Empty Pool Carefully
Once the pool is completely empty, take your time and inspect every part of it. This is one of the best chances you’ll have to spot problems that are hidden when the pool is full of water. Finding small issues now can save you from expensive repairs later.
Start by walking around the entire pool and looking at the walls and floor. Check for cracks, chips, or rough spots. Small cracks may not seem like a big deal, but they can grow larger over time if they are not repaired. If you notice long or wide cracks, they may be a sign of a more serious structural problem that should be checked by a pool professional.
Next, examine the pool surface closely. If you have a plaster pool, look for peeling, flaking, or worn areas. Fiberglass pools should be checked for blisters, scratches, or fading. If your pool has a vinyl liner, inspect it for tears, wrinkles, holes, or loose edges. Catching these problems early can help prevent leaks after the pool is filled again.
Look at the tiles around the waterline. Make sure none are cracked, loose, or missing. Damaged tiles are easier to replace while the pool is empty. Also check the grout between the tiles. Missing or broken grout can allow water to get behind the tiles and cause more damage over time.
Pay attention to all the pool fittings, including return jets, skimmers, drains, lights, and ladders. Make sure they are securely attached and show no signs of damage or rust. Rubber seals and gaskets can wear out with age, so inspect them for cracks or signs of leaking. Replacing these small parts now is usually much easier than waiting until the pool is full.
Look for stains that may point to hidden problems. Rust-colored stains can suggest metal corrosion, while dark stains may be caused by algae or minerals. White, chalky buildup often means calcium deposits have formed on the pool surface. Identifying the type of stain helps you choose the right cleaning method before refilling the pool.
Do not forget to inspect the area around the pool. Check the coping, deck, and surrounding concrete for cracks or places where water may have caused damage. Problems outside the pool can sometimes lead to issues inside it as well.
It is also a good idea to take photos of anything that looks damaged. Pictures make it easier to compare changes over time and can be helpful if you need advice from a pool repair company. You can also make a simple list of repairs so nothing gets forgotten before you start filling the pool again.
A careful inspection only takes a little extra time, but it can prevent much bigger problems later. Once you are confident that the pool is in good condition, you can move on to cleaning and making any repairs before adding fresh water.
Clean the Pool Surface Thoroughly
After inspecting the empty pool, the next step is to clean it from top to bottom. Even if the pool looked clean before it was drained, you will probably find dirt, stains, leaves, and mineral buildup once the water is gone. A deep cleaning helps the pool look better and prepares the surface for any repairs or fresh water.
Begin by removing all loose debris. Sweep out leaves, twigs, dirt, and any small rocks that have collected on the floor of the pool. A soft broom or pool brush works well for this job. Removing debris first makes the rest of the cleaning process much easier.
Next, scrub the walls and floor using a pool brush. Pay extra attention to corners, steps, and around the drains, where dirt often collects. Some stains may come off with just water and brushing, while others may need a pool cleaner that is safe for your pool’s surface. Always use products that match your pool type, whether it is plaster, fiberglass, or vinyl.
If you notice algae stains, scrub them thoroughly. Even though the pool is empty, algae can still stick to the walls and floor. Green, black, or yellow stains may need a special algae cleaner. Removing every bit of algae now reduces the chance of it returning after the pool is refilled.
Calcium deposits are another common problem. These appear as white or gray, chalky patches that feel rough to the touch. They often form around the waterline or on the pool walls. A cleaner made for calcium buildup or a pumice stone designed for pool use can help remove these deposits. Be gentle to avoid scratching the pool surface.
Rust stains may also be visible after draining the pool. These are usually caused by metal objects, old pool equipment, or minerals in the water. Using the correct stain remover will usually work better than scrubbing harder. Always follow the instructions on the cleaning product to avoid damaging the finish.
Some pool owners choose to use a pressure washer to clean the empty pool. This can remove dirt and stains quickly, but it should be used carefully. Too much pressure can damage plaster, loosen tiles, or harm a vinyl liner. If you are not sure how to use a pressure washer safely, a garden hose and pool brush are often enough for regular cleaning.
As you clean, keep an eye out for new cracks, loose tiles, or damaged fittings that may have been hidden under dirt or stains. Cleaning often reveals small problems that were difficult to see during the first inspection. It is much easier to fix these issues while the pool is still empty.
Once the entire pool has been cleaned, rinse away any leftover cleaning products and dirt. Do not leave soap or chemical residue on the surface before refilling the pool. A clean surface helps protect the new water and makes balancing the pool chemicals much easier.
Taking the time to clean the pool thoroughly is one of the best things you can do after draining it. A spotless pool is easier to maintain, looks more inviting, and gives you a fresh start before adding clean water.
Make Any Needed Repairs
After the pool is clean, it is the perfect time to make repairs. Even small problems can become much worse if they are ignored. Fixing them while the pool is empty is usually faster, easier, and less expensive than waiting until after it has been refilled.
Start by looking at any cracks you found during your inspection. Small surface cracks can often be repaired with a pool patch or repair compound made for your type of pool. Follow the product directions carefully and allow enough time for the repair to dry before adding water. Larger cracks or cracks that seem to be getting bigger should be inspected by a pool repair professional because they may point to a structural issue.
If any tiles are loose, cracked, or missing, replace them now. Loose tiles can fall off after the pool is filled, making the repair more difficult. Check the grout around the tiles as well. Fresh grout helps keep water from getting behind the tiles and causing damage over time.
For vinyl liner pools, inspect every inch of the liner. Small holes or tears can often be repaired with a vinyl patch kit. If the liner has large tears, many wrinkles, or is pulling away from the edges, it may need professional repair or replacement. Taking care of liner problems now can help prevent leaks later.
Fiberglass pools should be checked for chips, scratches, or blisters. Minor damage can sometimes be repaired using a fiberglass repair kit. If you notice deep cracks or large blisters, it is usually best to have them repaired by an experienced technician to ensure the surface stays strong and watertight.
Check all the pool fittings while they are easy to reach. Inspect return jets, skimmers, main drains, lights, ladders, and handrails. Tighten any loose parts and replace anything that is cracked or badly worn. Small plastic fittings can become brittle over time, especially after years of exposure to sunlight and pool chemicals.
Take a close look at the rubber seals, O-rings, and gaskets around pool equipment and fittings. These parts help keep water from leaking. If they look dry, cracked, flattened, or damaged, replace them before refilling the pool. They are inexpensive parts that can prevent much bigger repair bills later.
If your pool has underwater lights, inspect the light housing for cracks or signs of water damage. Make sure the light fixture is securely attached and that the seal around it is still in good condition. Never work on electrical components unless the power is completely turned off and you know how to do it safely.
This is also a good time to repair cosmetic damage. Small stains, rough spots, chipped plaster, or worn finishes can often be fixed while the pool is empty. These repairs not only improve the appearance of the pool but can also make the surface smoother and more comfortable for swimmers.
If you discover major structural damage, large leaks, or equipment that no longer works properly, do not rush to refill the pool. It is usually better to complete all major repairs first. Filling the pool before fixing serious problems may lead to wasted water and more expensive repairs later.
Making repairs after draining a pool may take a little extra time, but it helps protect your investment. Once everything has been repaired and checked, you can move on to inspecting the pool equipment and getting ready to refill the pool with fresh water.
Check Pool Equipment Before Refilling
Before you start adding fresh water, take a few minutes to inspect your pool equipment. A pool is more than just the shell that holds water. The pump, filter, plumbing, and other equipment all work together to keep the water clean and safe. Finding problems now can save you time and prevent expensive repairs after the pool is full.
Begin by checking the pool pump. Look for cracks in the pump housing and make sure all the connections are tight. Remove the pump lid and inspect the basket inside. Empty any leaves, dirt, or other debris that may have collected. A clean pump basket helps water move through the system more easily.
Next, inspect the pool filter. Whether you have a sand, cartridge, or DE filter, it should be cleaned before restarting the system. Dirty filters make the pump work harder and reduce water circulation. If the filter cartridge looks worn or damaged, replace it before refilling the pool.
Look over all the plumbing pipes and fittings. Check for cracks, loose connections, or signs of leaks. Even a small leak can waste a lot of water over time and make it difficult to keep the pool properly balanced. Tighten loose fittings if needed, but avoid overtightening, which can damage plastic parts.
Inspect the skimmer carefully. Remove any leaves or dirt from the skimmer basket and make sure the opening is free of blockages. A clean skimmer helps remove floating debris once the pool is filled again.
Take a close look at the return jets inside the pool. Make sure they are firmly attached and not clogged with dirt or small stones. Clean them if needed so water can circulate properly throughout the pool.
Check all the valves around the equipment pad. Turn each valve gently to make sure it moves smoothly. Valves that are stuck or difficult to turn may need cleaning or replacement. Working valves allow you to control water flow and make future maintenance much easier.
Inspect the O-rings and rubber seals on the pump lid, filter, and other equipment. These small rubber parts help create a watertight seal. If they look dry, cracked, or flattened, replace them before using the pool. Applying a small amount of silicone-based lubricant to good O-rings can help them last longer and create a better seal.
If your pool has an automatic cleaner, heater, saltwater chlorinator, or other extra equipment, inspect those as well. Make sure electrical connections are secure and there are no visible signs of damage. Clean any parts that have collected dirt or debris while the pool was empty.
Do not forget to check the pressure gauge on the filter. A damaged or broken gauge can give incorrect readings, making it harder to know when the filter needs cleaning. Replacing a faulty gauge is quick and inexpensive.
Finally, make sure everything is properly connected before turning the system back on. Double-check that drain plugs, pump lids, and filter clamps are secure. Taking a few extra minutes now can prevent leaks, poor circulation, and equipment problems after the pool is filled.
A careful equipment inspection helps ensure your pool starts up smoothly. Once everything is clean and working properly, you are ready to refill the pool with fresh water and begin balancing the water chemistry.
Refill the Pool Correctly
Once the pool is clean, repaired, and the equipment has been checked, it is time to refill it with fresh water. While filling a pool may seem simple, doing it the right way helps protect the pool and makes it easier to balance the water later. Taking your time during this step can prevent problems that are difficult to fix once the pool is full.
Start by using a clean and reliable water source. Most homeowners fill their pool with a garden hose connected to the home’s water supply. Make sure the hose is clean before placing it in the pool. If dirt or debris is inside the hose, flush it out for a minute before filling the pool.
Place the end of the hose near the deepest part of the pool. This allows the water to spread evenly as the pool fills. If you have a vinyl liner pool, placing the hose on a soft towel or plate can help protect the liner from scratches while the water flows in.
Once you begin filling the pool, try not to stop until it reaches the proper water level. Stopping and starting the water can sometimes leave rings or lines on the pool surface. In vinyl liner pools, it may also increase the chance of wrinkles forming in the liner. A steady fill gives the best results.
As the water level rises, check the pool every few hours. Make sure the hose has not moved and that the water is filling evenly. If you notice water collecting outside the pool, stop filling and inspect the area for leaks. Finding a leak early can save thousands of gallons of water.
Watch the walls and floor as the pool fills. If you see new cracks, shifting, or unusual movement, stop the filling process and investigate the problem. These issues are rare, but they should never be ignored.
Keep an eye on the pool fittings as well. Water should not leak around return jets, lights, skimmers, or drains. If you notice dripping or moisture around these areas, the seals or gaskets may need additional attention before the pool is completely full.
Continue filling until the water reaches the middle of the skimmer opening. This is the ideal water level for most residential pools. If the water is too low, the pump may draw in air instead of water, which can damage the pump. If the water is too high, the skimmer may not remove floating leaves and debris effectively.
Avoid adding pool chemicals while the pool is still filling unless the product instructions specifically tell you to do so. Water that is still mixing can cause uneven chemical levels. It is usually better to wait until the pool is completely full before testing and balancing the water.
Depending on the size of your pool and your home’s water pressure, filling the pool may take several hours or even a full day. Be patient and check on the progress from time to time. It is much easier to fix small problems during the filling process than after the pool is completely full.
Once the water reaches the correct level, turn off the hose and remove it from the pool. You are now ready to test the water, balance the chemicals, and start the filtration system. These final steps will make sure your freshly filled pool is clean, safe, and ready for swimming.
Balance the Pool Water
After the pool is completely full, the next step is to balance the water. This is one of the most important parts of getting your pool ready to use. Even though the water may look clean, it is not ready for swimming until the chemical levels are tested and adjusted. Properly balanced water helps protect swimmers, keeps the water clear, and prevents damage to your pool equipment.
Start by testing the water with a reliable pool test kit or test strips. Check the pH, total alkalinity, chlorine, calcium hardness, and cyanuric acid levels. These numbers tell you what needs to be adjusted before anyone gets into the pool.
The first thing to check is the pH level. For most pools, the ideal pH is between 7.2 and 7.6. If the pH is too low, the water becomes acidic and can damage pool surfaces, metal parts, and equipment. It may also irritate your eyes and skin. If the pH is too high, the water can become cloudy and make chlorine less effective. Add a pH increaser or reducer as needed, following the instructions on the product label.
Next, test the total alkalinity. This helps keep the pH stable. A good range for most pools is between 80 and 120 parts per million (ppm). If the alkalinity is too low, the pH can change quickly and become difficult to control. If it is too high, adjusting the pH becomes harder. Make small adjustments and test the water again before adding more chemicals.
Now check the chlorine level. Chlorine kills bacteria, viruses, and algae that can grow in pool water. Most pools should have a free chlorine level between 1 and 3 ppm. If the level is too low, add chlorine according to the product directions. Some pool owners also shock the pool after refilling to give the water a fresh, clean start.
Calcium hardness is another important measurement. Water with very low calcium can slowly damage plaster and other pool surfaces. Water with too much calcium may leave white scale on the walls and equipment. Most pools should have a calcium hardness level between 200 and 400 ppm, although the exact range depends on the pool type.
Do not forget to test cyanuric acid, also called a chlorine stabilizer. This chemical helps protect chlorine from being broken down by sunlight. Without enough stabilizer, chlorine can disappear very quickly on sunny days. Most outdoor pools work best with cyanuric acid levels between 30 and 50 ppm.
After adding any chemicals, turn on the pool pump and let the water circulate. Running the pump helps spread the chemicals evenly throughout the pool. Most experts recommend circulating the water for at least 24 hours after a fresh refill before making any major chemical adjustments.
Test the water again after several hours or the next day. Sometimes the first round of adjustments is not enough, especially after filling a large pool with fresh water. It is normal to make small changes until all the levels are within the recommended ranges.
Avoid adding several different chemicals at the same time unless the product directions say it is safe. Some chemicals can react with each other if mixed directly. Add one product at a time, allow it to circulate, and then retest before adding another.
Balancing your pool water may seem like a lot of work, but it quickly becomes part of regular pool care. Clean, balanced water looks better, feels more comfortable to swim in, and helps your pool equipment last longer. Once all the chemical levels are correct, you can move on to restarting the pool system and getting everything ready for normal use.
Restart the Pool System
After the water is balanced, it is time to restart your pool system. This step keeps the water moving, helps the chemicals mix evenly, and removes dirt and small particles from the pool. Starting the equipment the right way can also help prevent damage to the pump and filter.
Before turning anything on, make one final check of the equipment. Make sure all drain plugs are in place, the pump lid is secure, and all valves are set correctly. Double-check that any tools or cleaning supplies have been removed from the pool area.
If your pump was emptied while the pool was drained, you may need to prime it. Priming means filling the pump housing with water before starting it. This helps the pump create proper suction and prevents it from running dry. A pump that runs without water can overheat and become damaged in just a few minutes.
Once the pump is primed, switch it on and listen carefully. The pump should start smoothly without making loud grinding, rattling, or squealing noises. A quiet, steady sound usually means everything is working properly. If you hear unusual noises, turn the pump off and inspect it before continuing.
Watch the water flowing through the return jets inside the pool. You should see a steady stream of water coming back into the pool. Good circulation helps distribute chlorine and other chemicals evenly while keeping the water clean.
Next, check the pressure gauge on the filter. The pressure should stay within the normal range recommended for your filter. If the pressure is much higher than normal, the filter may need cleaning or there could be a blockage somewhere in the system. If the pressure is too low, there may be an air leak or another issue that needs attention.
Walk around the equipment pad and inspect all the pipes, valves, and fittings. Look for dripping water or damp areas that could indicate a leak. Even a slow leak should be repaired as soon as possible because it can waste water and reduce the efficiency of the pool system.
If your pool has a heater, saltwater chlorinator, automatic cleaner, or water features, turn them on one at a time after the main circulation system is working properly. Check each piece of equipment to make sure it starts normally and operates without warning lights or unusual sounds.
Allow the pump to run continuously for at least 24 hours after refilling the pool. This gives the water enough time to circulate through the filter and mix all the chemicals evenly. During this time, check the water a few times to make sure it stays clear and that the equipment continues to run smoothly.
After the first day, test the pool water again. The chemical levels may change slightly as the fresh water circulates. Make any small adjustments needed to keep the pH, chlorine, alkalinity, and other levels within the recommended ranges.
Finally, keep an eye on the pool over the next several days. Check the pump basket, empty the skimmer basket if needed, and monitor the filter pressure. Regular checks during the first week help catch small problems before they become expensive repairs.
Once the pool system is running properly and the water is balanced, your pool is ready to enjoy. Keeping up with regular maintenance from this point forward will help your pool stay clean, safe, and in great condition all season long.
Safety Tips After Draining a Pool
Draining a pool can be helpful for cleaning, repairs, or replacing old water, but it also comes with risks. An empty pool is more fragile than many people realize. Following a few simple safety tips can help protect both your pool and everyone around it.
One of the most important rules is never to leave an empty pool unattended for long. A drained pool can become dangerous, especially if children or pets have access to the area. Without water, the pool floor and walls can also become damaged if they are exposed to harsh weather for too long.
Try to avoid draining your pool during extremely hot weather. Direct sunlight can dry out some pool surfaces, causing plaster to crack or vinyl liners to shrink. If possible, plan your work for mild weather and refill the pool as soon as your cleaning and repairs are finished.
Heavy rain is another reason to delay draining your pool. Rainwater can build up around the outside of the pool, increasing groundwater pressure. In some cases, this pressure can push the empty pool upward, causing serious structural damage. This problem is uncommon but can be very expensive to repair.
Keep the pool area clean while it is empty. Remove tools, hoses, cleaning products, and loose debris as you work. A tidy work area reduces the chance of slipping, tripping, or accidentally damaging the pool surface.
Be careful when walking inside the empty pool. Some surfaces become slippery after being cleaned, especially when soap or cleaning solutions are used. Wear shoes with good grip if the pool surface allows it, and move slowly to avoid falling.
If you are using cleaning chemicals, always read the instructions before using them. Wear gloves and eye protection when recommended. Never mix different pool chemicals together because some combinations can create dangerous gases or harmful reactions.
Turn off the electrical power before working on pool lights, pumps, or other electrical equipment. Water and electricity are a dangerous combination. If you are unsure how to repair electrical parts safely, contact a qualified pool technician.
Make sure the water you drain from the pool goes to an approved location. Many cities and towns have rules about where pool water can be discharged. Draining water into the wrong place can damage the environment or lead to fines. Check your local regulations before you begin draining the pool.
Do not rush the refill process after repairs are finished. Take one last walk around the pool to make sure every repair has been completed, all tools have been removed, and the equipment is ready to operate. Spending a few extra minutes checking everything can prevent problems later.
Finally, know when to ask for professional help. Large cracks, major leaks, electrical issues, or signs that the pool has shifted should not be ignored. An experienced pool professional can identify problems that may not be obvious and recommend the safest repair.
By following these safety tips, you can protect your pool, avoid costly mistakes, and make the entire draining and refilling process much smoother. With proper care, your pool will be clean, safe, and ready for many more seasons of swimming.
Conclusion
Draining a pool is only the first step. What you do afterward is just as important. Taking the time to inspect the pool, clean every surface, make repairs, check the equipment, refill the pool correctly, balance the water, and restart the system helps keep your pool in great condition. These steps also reduce the chance of leaks, equipment problems, and costly repairs in the future.
Regular maintenance after refilling your pool will keep the water clean, clear, and safe for everyone to enjoy. Test the water often, clean the filter, empty the skimmer basket, and inspect the equipment throughout the swimming season. Small maintenance tasks are much easier and less expensive than fixing major problems later.
If you notice cracks, large leaks, or equipment that does not work properly, do not ignore the warning signs. Fixing issues early can extend the life of your pool and help you avoid bigger repair bills. When a repair is beyond your experience, it is always a good idea to call a qualified pool professional.
By following these simple steps after draining your pool, you can protect your investment and enjoy a cleaner, healthier swimming pool for years to come. A little extra care today can save time, money, and frustration in the future while giving you a pool that is always ready for your next swim.