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Suggestions on Replacing Swing Check Valve

KevinWyman
KevinWyman Member Posts: 24
Put check valves in per boiler manufacturer's suggested piping detail. Used 1 1/4" and 1" swing check valves.  System is great except for the noisy check valves. Seem to make fluttering sounds; a constant chattering as the pump pushes water past the open valve. Can't hear it upstairs, but in the basement, unless the TV is turned up loud, it is downright annoying.

What should I replace these valves with once I get around to it?

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