Not at all unexpected failure.

Happened to be at my workbench when hot water started pouring down off the powershed roof…


…and to be honest I’m surprised it took this long. PVC cement melted, I’m guessing. That water gets hot when the sun is really shining. Need to find a different sort of plumbing to connect to the hoses.

About Joel

You shouldn't ask these questions of a paranoid recluse, you know.
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8 Responses to Not at all unexpected failure.

  1. Jim Price says:

    Use CPVC. It’s rated for hot water up to 200F. Better yet, copper if you don’t mind spending the bucks.

  2. Ben says:

    Yes, CPVC. It uses different glue and all different fittings. They deliberately changed the OD to be sure that you don’t try to sneak in a pvc fitting.

    Are you sure that the water hose hasn’t failed?

  3. TK421a says:

    I’m curious, what size hose are you using Joel?

  4. Anonymous says:

    you may need a pop off valve at the high point in your set up

  5. The Neon Madman says:

    Well, for one thing it certainly illustrates the potential that you have there for a hot water system.

    In the long run, I tend to think that the ultimate solution will be copper tubing with circulating water and a storage tank. I suspect that with the temps that you are seeing, the rubber hoses and plastic pipe are going to have a pretty limited life. But this is an incremental project on the cheap as well, whatever you can get to work is good. Please keep it up, many of your readers are interested in the project.

    Good luck.

  6. terrapod says:

    Just FWIW, I have an old very heavy black rubber garden hose that has been outdoors for 10 or more years,summer, and winter. It seems to hold up to the weather quite well. Some critter chewed through the outer sleeve and below is a knit mesh of nylon filament, quite thick line – think heavy fishing line, under which is the second rubber of the actual water sleeve. I suspect this kind of very heavy duty hose will hold up better than anything else. Have had very poor luck with plastic type hose regardless of flexibility or fabric covered (expanding hoses – which have crappy latex inner tubing that fails constantly).

    Can’t tell from the photo exactly what you have in your prototype unit but exposure to UV will probably kill it eventually. Soft copper tubing that can be carefully looped is going to be the only thing that will truly last and you can spray paint it mat black if you want.

    Pex will withstand the heat up to a point but most of the stuff has warnings NOT to leave it exposed to UV, indoor use only. I know homes are piped with it nowadays but still prefer copper and solder. .

  7. Joel says:

    I’m curious, what size hose are you using Joel?

    It’s 5/8″.

  8. TK421a says:

    When I helped a friend install a solar water heater for the pool, we used flexable rubber connectors with steel clamps. However, I can’t seen to find any in 5/8″. One option would be to get a few Compression Coupling Fittings to join things together.

    https://www.lowes.com/pd/BrassCraft-5-8-in-x-5-8-in-Compression-Coupling-Fitting/50380864

To the stake with the heretic!