Solar water heater vacuum tube connection

March 21, 2014 | Filed under: Videos | Posted by:


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2 Responses to Solar water heater vacuum tube connection

  1. So far, I’ve only seen the suggestion to use PVC or ABS fittings to create
    the manifold. But neither of these plastics is acceptable for UV exposure.
    I’m thinking a copper (or steel) manifold trunk, with these glued in via
    polyether caulk, and that whole trunk encased in something like a sonatube
    filled with foam insulation. The sonatube wouldn’t work either, being
    exposed. But something like that may work. Or using polyether with plastic
    fittings if it’s insulated & encased in protection?

    smoovetipp
    March 21, 2014 at 10:24 am
    Reply

  2. The differential expansion between the materials will crack that glued
    connection.

    Kevin Dickson
    March 21, 2014 at 10:53 am
    Reply

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