We got a small above ground pool for the kid's and so naturally Dad decided to find a way to heat it. Solar was the first step and a wood burning heater, the second step. Following is how I built the Solar Pool Heater.
The Solar Heater works by letting the water in the black pipe heat in the sun for one hour and then pumping that water into the pool (I found this takes about ten minutes). I installed it on my garden shed roof that is East West facing with a very shallow peek so both sides get sun almost all day.
Some of the Parts I used.
1. 300 ft of black 1/2" drip irrigation pipe. (three one-hundred foot rolls)
2. 12 volt dc utility pump (the connections fit garden hose quick connectors).
3. 12 volt Battery to run the pump (i had an old gel battery for a power wheelchair).
4. 12 volt timer with 17 programmable times ( off for one hour and on for ten minutes ).
5. 12 volt battery charger ( The plan is to replace this with a solar charger ).
6. Some 1/2" copper pipe; garden quick connection fittings; 1/2" PVC pipe and fittings; pipe clamps; wire and a roll of masons line.
I wanted a way to join the three lengths of pipe with a smooth low profile this is what I came up with.
1. I cut a 1" piece of copper pipe and pushed it into the one end of the pipe to be joined. ( I let the pipe lay in the sun to get hot so it was easier to work with).
2. I then heat up the other end of the pipe to be joined with a small hand torch and then stretched it. ( I used the 1/2" end cap on the Wire Clamp Tool, which i made in one of my other instructables).
3. I then pushed this end over other end with the copper pipe in it.
4. Now I used the Wire Clamp Tool to make a clamp Joint.
I joined all the pipe before I made the coil because I pressurized the pipe with water to be able to make a good coil and make it easier to bind with the masons line.