SCH 20 PVC As Low Temp Heat Exchanger Tubing

Thanks, I'll keep that in mind.

wellllllll

let me tell you what happened to me in this situation

made a solar collector using sch. 40 pvc

man did that puppy work nice

until the day time temps inside reached 135 degrees F, and night time temps reached -30

guess the glued joints couldn't handle the expansion and contractions

need I say more?

High temperature PVC costs a little more but is good to 150 F at city water pressure. I once used it for a hot water spray rack, lots of small nozzles so it can take high back pressure. It may sag but it won't leak.

But that's irrelevant here.

An evaporative pool or AC chiller operates at lower temperatures than a solar heater.

The tower keeps it out of the sun so it isn't really any different than plumbing a house with PVC.

There may be short exposed sections where metal might make sense but most if not all of the heat exchange area could be with the cheapest material on earth.

Bret Cahill