Author Topic: Hot water isolation valves  (Read 326 times)

S/V AMITY

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Hot water isolation valves
« on: November 02, 2020, 05:58:23 PM »
   Have a Westerbeke W44B tied with the domestic H/W tank.  Does anyone see a problem with installing valves to isolate the feed & return engine coolant lines to the H/W tank?  Reason for doing so would be to loop-out the tank in case the tank develops a leak where the coolant leaks into the fresh water side of the tank or vice versa.


S/V Deo Volente

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Re: Hot water isolation valves
« Reply #1 on: November 04, 2020, 09:58:59 AM »
I built a manifold with valves to isolate the water heater, and the "bus" heater, as well as a valve to shut off the bypass. This way I can heat the water faster by shutting the bypass. On long runs under power I shut off the water heater to keep it from boiling over. 
"S/V Deo Volente"
Pearson 365 Pilothouse
Hull #17 1980
Duluth Minnesota
Bob

S/V AMITY

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Re: Hot water isolation valves
« Reply #2 on: November 04, 2020, 10:11:10 AM »
OK, thanks!

S/V AMITY

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Re: Hot water isolation valves
« Reply #3 on: December 02, 2020, 08:40:14 AM »
  Has anyone here worked out a thermostatic control somewhere in the HW system to control the temp? 160 deg. right from the HW tank coming out of a tap or shower is not good.  I know there are thermostatic shower control valves for house use (required by code)... might one of those be adaptable for our systems?