[C320-list] Hot Water Heater Cold Water Line - Check Valve

[Paul Rickman]

Dave,

Couple things.

If you look at the West Marine catalog on page 348, they show a "non-return valve" just
before the hot water heater, on the cold water side. That is the way mine is designed in 1999.
Need it or not, it is designed that way.

Coming off the cold water side of the hot water heater I have a three inch hose connected with hose clamps
on each end.. Then an adapter-female 1/2" quick connect, followed by a white three inch ~ Whale check valve that goes into a quick connect equal tee. The check valve is smooth just like the blue and red tubs. The end stuck into the adapter simply would not hold, it would blow out of the quick connect and of course water goes all over the place. (If you didn't know this was a check valve, it would just look like a piece of white
tubing, you actually have to look inside to see it).  I don't know what size this check valve is, either 15MM
or 1/2 inch. But the newest Whale white check valve that I have held in my hand, from page 352 is 1/2, not
15 MM and not nearly long enough to work. So that is why I went with the brass one.

I was out all weekend and the new connection using the in-line non-return valve made of brass held the entire
time.  See West Marine catalog page 348. Hopefully, it is fixed this time. If it fails again, I may just get some blue tubing and try it without a check valve (non-return).


Paul
Affinity 657
Bay Bridge Marina




________________________________
From: djgleason1 <djgleason1 at juno.com>
To: C320-List at Catalina320.com
Cc: C320-List at Catalina320.com
Sent: Tuesday, September 8, 2009 11:34:50 AM
Subject: Re: [C320-list] Hot Water Heater Cold Water Line - Check Valve

Paul:

I have #150 and have taken almost all Whale fittings off at one time or
another and am not aware of any "Check valve".  I see no need for one, as
the pressure pump is on the cold water side of the hot water tank.  

When you say, "It now blows out even though I've replaced the Whale quick
connect fittings."  I am not sure I understand what you are  saying.  Can
you provide a more detailed description of what you experience?

Dave Gleason
Proud Mary, #150


On Wed, 2 Sep 2009 18:28:44 -0700 (PDT) Paul Rickman
<ilove2sail at verizon.net> writes:
> My concern now is that there is a Whale check valve in there now and 
> has been for 10 years. It now
> blows out even though I've replaced the Whale quick connect 
> fittings.
> 
> But the next answer here may be the fix. 
> 
> Thanks.
> 
> 
> 
> 
> ________________________________
> From: Brad Kuether <bkuether at comcast.net>
> To: C320-List at Catalina320.com
> Sent: Wednesday, September 2, 2009 8:53:57 PM
> Subject: Re: [C320-list] Hot Water Heater Cold Water Line - Check 
> Valve
> 
> Paul,
> 
> It is my understanding (I am starting to understand this boat, a 
> little anyway) that a cold water line feeds the hot water heater.  
> Are you asking if there is some type of valve that prevents the hot 
> water from flowing back into the cold water line that feeds it?
> 
> If this is the case, wouldn't the water pressure from the water in 
> the water line prevent that?  I can't see water from the hot water 
> tank finding its way back to water tank as it too has water in it 
> and has pressure....
> 
> What is the concern?
> 
> Or am I not getting it?  (which may be why no one replied?)
> 
> Not being crass.
> 
> -Brad, Mary, Monica, and Jarod
> "Independence"
> 2004 Catalina 320 Hull 1006
> Middle River, MD
> 
> 
> ----- Original Message ----- From: "Paul Rickman" 
> <ilove2sail at verizon.net>
> To: <C320-List at Catalina320.com>
> Sent: Wednesday, September 02, 2009 7:22 PM
> Subject: [C320-list] Hot Water Heater Cold Water Line - Check Valve
> 
> 
> A few days ago, I put out a question about the Whale Quick Connect 
> fitting and a back flow preventor
> on the cold water line right next to the hot water heater. I didn't 
> get any answer. So lets try this:
> 
> Does the cold water line require a "check valve"? Will a check valve 
> prevent the hot water from flowing
> back into the cold water line? Does anyone know what people use for 
> a check valve, if any, in the cold water
> line? Check valve = back flow preventor.
> 
> I'm going out to some of my local boat supply stores tomorrow to 
> check on plumbing supplies.
> 
> Thanks,
> Paul
> Affinity 657
> Baby Bridge Marina
> 
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