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Old 24-05-2018, 22:28   #16
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Join Date: May 2016
Location: The Med
Boat: Catalina 36 MKI
Posts: 149
Re: shot of hot water from cold water taps

My apologies for my non-responsiveness but I had a projectlist longer than the boat, only 2 weeks and desperately wanted to get some sailing time before flying home again.

By your comments it looks like the non-return valve sometimes gets a little stuck, I will have a look and see if I can disassemble and clean when Iím back on the boat in 2 months

Thank you for the input and advice.
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Old 25-05-2018, 16:33   #17
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Join Date: Oct 2007
Location: Sydney Australia
Boat: Dufour 35 Classic
Posts: 78
Re: shot of hot water from cold water taps

Further to my last post on the subject, it is more likely to happen if your cold water input line is off a "Tee" connection and the cold water line continues to the offending fittings, rather than the heater being at the end of the cold water line.

In other words the PRV is not working so a little hot water backflows and gets into the cold water line at the Tee and then comes down the cold line.
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