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Old 26-10-2014, 13:56   #16
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Re: Pressure water pump overpowers hot water tank

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Originally Posted by transmitterdan View Post
Is it possible you have the inlet and outlets plumbed backwards? It makes a difference in most heater designs.

Also, make sure that you have all the air out of the heater. Look at the instructions for any hints at bleeding the air out.

I did bleed the system. Will recheck the lines again.
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Old 26-10-2014, 13:57   #17
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Re: Pressure water pump overpowers hot water tank

Just forgot my manners.

Thanks for the suggestions.http://www.cruisersforum.com/forums/...lies/smile.gif
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Old 26-10-2014, 15:01   #18
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Re: Pressure water pump overpowers hot water tank

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Blue Stocking,

Glad you survived Gonzalo and I hope all will be back to normal soon.

A non-return valve isn't mandatory. The hot water will back up into the cold pipe a little but if there are no cold taps close by it isn't a problem. When hot water is drawn from a tap then cold water flows into the heater. There is no tendency for hot water to flow backwards then.
If there is no non-return valve, and the cold water tap is opened, it will considerately draw back the hot water. But length or runs factors in. Had this same problem with Blue.

Gonzalo was nasty, eye over us for 2 hrs. Back side wind from the NW was strongest and did more damage than SE quadrant. Blue needs new paint job.
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Old 11-11-2014, 01:14   #19
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Re: Pressure water pump overpowers hot water tank

I think that I had the same problem. It was a simple fix... Those heaters are designed to work with an air gap. You have to restore the air gap about twice a year if the temp changes with seasons. (I had to do it twice, as it had been a while) Tells how to do it in the manual below, takes about 5mins

Page 9 of 11 in link below:

http://newcontent.westmarine.com/con...r%20Manual.pdf

Good luck!


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