Winterize Your In-Ground Pool in 10 Easy Steps 

Pool Service


1) CLEAN: Brush the walls of your pool and make sure the water is completely clean of debris, toys, and any accessories. Vacuum or run an automatic cleaner twice as long as usual to ensure complete cleanliness and empty the skimmer and pump baskets as needed.

2) BALANCE: Use a test kit to ensure your water is properly balanced:

pH: between 7.2 and 7.6,
Calcium: between 175-225 ppm,
Alkalinity (plaster/gunite pools): between 80-125 ppm
Alkalinity (other pools): 125-150 ppm
Chlorine: 1-4 ppm
Chlorine Stabilizer: 30 ppm

3) DRAIN: In cold weather, water expands and freezes, which can crack pipes and harm pool equipment. Drain all water from the pipes and pool systems to prevent unnecessary damage from occurring.

4) REDUCE WATER LEVEL: Keep your water level low in your pool to reduce any associated issues, but DO NOT drain all of it. A common rule of thumb is to drain the water approximately two inches below the return line. If you utilize an automatic cover, decrease the water level to about two inches below the throat of the skimmer.

5) EXPEL WATER: The return lines can house water droplets, which need to be completely removed from your pool plumbing system. The best way to remove any remaining water is to blow out your lines with an air compressor or a very powerful shop vac. Whatever you use, make sure the system snugly fits into the pool pipes where no air can escape. Once water has been expelled, plug your return lines. Consult a pool service technician to ensure this is done correctly.

6) AIRLOCK DRAIN: Open the valve of your main drain, and use the same blower to push out all water. Turn your valve to the off position once you see bubbles coming up from the pool drain.

7) PROTECT POOL: If you’re using a modern pool sanitization system such as Ozone, UV, or AOP alongside a chlorine residual, your pool water will stay clean, clear, and protected from harmful viruses and bacteria. Still, a smart move would be to thoroughly clean your filter, shock your pool, and add an algaecide so that when you open your pool again, your water will be the cleanest it can possibly be.

8) Ozone/UV/AOP SYSTEMS: If you are using a modern pool sanitization solution, the unit must be drained to prevent freeze damage to wetted components. If the system is mounted below the water level, bypass valves must be closed. Lastly, locate the drain plug to remove any remaining water and power off the system.

9) COVER: A durable pool cover that is properly attached and completely covers your pool water is best. Damaged covers should be replaced prior to winterizing. Also, once the cover is on, keep the top of the cover clean and free of any debris that could potentially make its way in the water.

10) POWER OFF: Shut off all power to Ozone/UV/AOP and any other pool systems. Turning off power from the circuit breaker is the best way to ensure that nothing gets tripped during the offseason, so you can sit back, relax, and look forward to a well maintained pool ready for next summer! 


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