I bought a set also on Ebay. I hooked them up and worked great... until on of the connections let loose. OMG emptied right down to the skimmer...! However it was an installation error (mine) that caused the problem.

They raised the temp from 55 to around 75 in about a week. I have a 24' AG and live in NW CT. Only get about 6 hours of sun daily, but used a solar cover almost the whole time. I usually don't see those types of temps until late July.

I do have one concern. When I run the heater the pressure on my filter raises about 5 psi (14 psi normal, 19 psi when heater is going) and the return to the pool is much weaker. I have it set up with ball valves so I can turn it on and off. I used 1 1/4" black poly hose for the run. The fittings on the unit are 1 1/2", I used fenco rubber adapters to connect. Is the change in diameters causing the increased pressure? Is this going to cause damage to the filter or the pump motor?

mark