Inlet heights correspond to hot water stratification in the tank. The best position for the solar
flow and return inlets around the perimeter has not been investigated. However, if they are on
the opposite side from the cold and hot to and from the house, this may simplify plumbing.
3.1.4 Fittings Required for Inlet Plumbing
The tank inlets are sealed with „bulkhead‟ fittings. From inside of the inner tank:
Couplernipple (this passes through the inner tank wall and its insulation), coupler, long
nipple (this passes through the outer tank wall and its insulation)
If this nipple is long enough Gal. to CPVC adaptor CPVC pipe
Otherwise connect outside of the cylinder: Coupler Nipple Adaptor pipe
The bulkhead fittings are made water tight with a rubber washer and then an HG washer on
either side of the nipple penetrating the inner tank. HG Washers are supplied according to the
size of the fitting, but should be wide enough for effective sealing. During tightening the HG
washer should apply even pressure on the rubber washer. High-temperature-silicone is also
applied on the inside. Threaded joints are to be sealed with PTFE (Teflon, preferably the high
temperature resistant variety.)
Inner hot water tank: bulkhead fitting (outside the tank)
Inner hot water tank bulkhead fitting (inside the tank)
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