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Hot water system

I'm a bit lost on this subject. I'm trying to install a water heater on my boat so I can have hot water. I'm looking at a electric/engine heat exchanger unit. here is the big question, do I need to make the whole system pressuarized? Or can I just install the heater downstream from the existing water tank? Can someone guide me thru this?

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post #2 of 4 Old 10-31-2007
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Hello,

On the boats I have owned with hot water heaters, the plumbing went from the fresh water tank(s) to a demand water pump. The output of the pump went to a manifold that fed the hot water heater, galley, and head.

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Barry Lenoble
Deep Blue C, 2002 C&C 110
Mt. Sinai, NY

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post #3 of 4 Old 10-31-2007
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Quote:
Originally Posted by Borvaprops View Post
I'm a bit lost on this subject. I'm trying to install a water heater on my boat so I can have hot water. I'm looking at a electric/engine heat exchanger unit. here is the big question, do I need to make the whole system pressuarized? Or can I just install the heater downstream from the existing water tank? Can someone guide me thru this?

Thanks

I have the same system, the water pump pumps activated by loss of water line pressure. Its up stream of everything.

I have a vetus water heater and it works downstream of the pump with a check valve.

Also the heater gets hot water from the engine cooling system.

Here is my Vetus heater manual all you need is there..good luck CLICK HERE

and here for the drawing in the middle pages marked with 8 L and 19 L is what you need.

edit..here 2 diagrams for water heater system




Last edited by Giulietta; 10-31-2007 at 03:25 PM.
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post #4 of 4 Old 10-31-2007 Thread Starter
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Muito obrigado Giulietta
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