Watts Swing Check Valve

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M1687

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Hi,
I have two Watts Swing check valves (1 1/2" sweat) on my boiler system that are leaking between the main body and the top portion of the valve. They don't sell gaskets and I want to reseal them before winter. Any advice? Do I make my own gasket and seal with rtv? My boiler system runs on the higher pressure side (20 psi +/-) due to one of the zones being inactive and has hvac antifreeze in it. Thanks.
 

plumber69

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Hi,
I have two Watts Swing check valves (1 1/2" sweat) on my boiler system that are leaking between the main body and the top portion of the valve. They don't sell gaskets and I want to reseal them before winter. Any advice? Do I make my own gasket and seal with rtv? My boiler system runs on the higher pressure side (20 psi +/-) due to one of the zones being inactive and has hvac antifreeze in it. Thanks.
If it's the threaded nut part thephlon works
 

M1687

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M1687

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I don't see Watt's products around anymore like I used to. The local HVAC store (Ferguson) wants $226. a piece for the Nibco version. I can practically manufacture these myself for that price.
 
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