Pressurized wzter system piping and fittings

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Trowerpower
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Location: Northern Kentucky

Pressurized wzter system piping and fittings

Postby Trowerpower » Sat Aug 15, 2020 10:39 am

Replaced my original hot water on my boat recently and the fittings that connect to the water heater are dripping slightly. I cannot find new fittings like mine anywhere. The plastic tubing has"iapmo" on it. 3/8" x 1/2" od is the size. Thanks!
Trower Power
1987 32ft Marinette Sedan Flybridge
Blue Sky
twin 392 Chrysler Stroker Motors
Performance Distributors
750 Edlebrocks
fresh water cooled
1.5 to 1 velva-drives
Onan 6.5kw gen set

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GB49
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Location: Catawba Island, OH.

Re: Pressurized wzter system piping and fittings

Postby GB49 » Sat Aug 15, 2020 11:36 am

Your 87 should have Qest plumbing fittings from the factory. You can google around with that name and find places that sell parts. Below are a couple of sites that popped up for me.
https://www.plumbingsupply.com/polyb.html
https://www.amazon.com/slp/qest-plumbin ... staycsv7vv

-Karl
1986 Sedan 32'. Twin Chrysler 360in^3, 275hp, with K&N flame arrestors.
Forum member since 1998, 1262 original forum posts.

pbaker32s
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Re: Pressurized wzter system piping and fittings

Postby pbaker32s » Sat Aug 15, 2020 8:34 pm

FYI one of those fittings should have a one way check valve also . May want to try to disassemble, use Teflon tape and try it again. try turning the thermostat down a little also.

Bryank97
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Re: Pressurized wzter system piping and fittings

Postby Bryank97 » Wed Aug 19, 2020 11:18 am

I will attest to the check valve on the hot water. It keeps the hot water from mixing with the cold every time you turn on the cold side. If its just dripping slightly I would try some pipe dope on the fittings, otherwise buying new polybutene fittings is the next best option. I had to source them online as well.
1988 Marinette 32 Sedan
Erie, PA
Twin 318 Chryslers 240HP

Trowerpower
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Posts: 173
Joined: Sun Dec 07, 2014 8:50 pm
Location: Northern Kentucky

Re: Pressurized wzter system piping and fittings

Postby Trowerpower » Wed Aug 26, 2020 8:37 pm

Made up a new line with Starbrite fittings. Whoever created theses fittings is a genious. I will install it over the weekend. Thanks for your help! Qest fittings ate gone.
Trower Power
1987 32ft Marinette Sedan Flybridge
Blue Sky
twin 392 Chrysler Stroker Motors
Performance Distributors
750 Edlebrocks
fresh water cooled
1.5 to 1 velva-drives
Onan 6.5kw gen set