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solar water heater question
#1
Have a client that is out of town. Neighbor noted steam rising from the solar panel on a hot day. Is there a vent on the panels? Or, could it just have been rainwater evaporating out of the nooks and crevices in the panels?


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#2
There is a pressure relief valve on the panels.It could be malfunctioning.
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#3
If the circulation pump fails, you can overpressure the water heater panels on a sunny day - if the pressure relief valve is working properly, it will prevent the panels from breaching due to the pressure. I have a couple of derelict panels where the relief valve failed and destroyed the panels.
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#4
Thanks for the information... Is the pressure relief a resetting valve like the one on the water tank?


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#5
quote:
Originally posted by Royall

Thanks for the information... Is the pressure relief a resetting valve like the one on the water tank?


It should be - but, like on water tanks, once it starts to release, it could continue leaking indefinitely. Best to watch it and see if it re-seals properly.
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