diy pool heater

i have tried so many different ways to heat my pool water and have had little luck. One way I did it was to take about three hundred feet of black 1/2" drip line and run it around the pool rim. I supplied cold water from a smalloutlet attached to the return line,using the power of the filtration pump to move the water from the pool through thecoil and I adjusted the flow to about half of the normal, then at the end I had the heated water re-enter the pool. Iwould say the water got to about 100 degrees, by the time it went through the drip line. The problem is that it wasn'tefficient enough to have any real effect on the pool water temperature which stays at about 60-65 even on the hottest days. I live in the Sacramento area of California, and we get pretty hot summers, usually about 90-105.
Any suggestions on how I could make this idea more efficient? My pool water temp is always too cold to swim in, and I have a capacity of 12,000 gallons.

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harrold3 years ago
Thanks a lot for this post. I was searching for this on the internet today, really glad!
jxross3 years ago
Your description does not sound reasonable. I live south of Fresno so I have a very similiar climate to you. I have a 10,000 gallon above ground pool and it easilly gets above 80 degrees in the summer with no intentional heating effort on my part.

If your temp number is correct, I have two possibile reasons.

1... Is the pool in the shade?  If so, try opening the site up to more sun.  I once put a shade cover over my pool and that year the water stayed pretty chilly.

2... I will note that night-time temps in Sacramento rarely fall below 70 in the summer, so 65 degree water is below ambient temps.  This can only happen if "new" water (at about 50-55 degrees in your area) is being added regularly, and in large quantities.  How often is water added to the pool?  Does the pool have an undetected leak?  If it is an in-ground pool, it likely has an auto-fill valve and you may not even know it is adding water. 

Good luck. 
skeeter_ca3 years ago
You have the right idea just make it bigger. You need more coils in parallel to had more heater to the pool. See below example of a good system.


Jayefuu4 years ago
Put a solar cover on your pool while you're not using it. It will
a) Increase heat gain on sunny days
b) Stop the heat gained through the drip line from escaping
c) Reduce evaporation.
d) Keep out bugs

The most important time to have it on is at night while you're not getting any heat gain from your piping. Also remember to turn off the pump that circulates water through the piping at night, or you'll be losing not gaining heat throught the piping at night.
amurphyz4 years ago
I have seen the same system you are talking about, but instead of running around the outside of the pool, they ran it up the side of the house, and made "loops" from the top of the roof to the bottom. Didn't look bad either, really couldn't tell it was even there, and then ran it back down the house and into the pool.
buffy4moore4 years ago
What about putting a solar cover on the pool. This stuff looks like blue bubble wrap.
caitlinsdad4 years ago
Search "solar pool heater" and you will see other ibles on this topic. Seems they all built a typical collector box aimed at the sun. Water is heated to a higher temp inside the windowbox and output to the pool. Maybe the heat is lost circulating around the pool rim to the outside air before it gets into the pool. Good luck.