Check valves | Plumbing Jobs | The Job-board | Plumbers Forums

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Check valves

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Discuss Check valves in the Plumbing Jobs | The Job-board area at Plumbers Forums

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does a valve with a smaller internal diameter than the pipe,
with the resistance of a spring to overcome,
and the plug held by the spring to go around, have an effect??
what do you think??

how much effect?
more noticeable with less pressure to start with, ie gravity fed
 
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