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Old 09-04-2012, 12:43 PM   #1
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Washer Outlet Box Valves


I hope that someone can explain this to me. Why is it that every washer outlet box I've come across, the valves have straight threads for connecting to the supply system? It's always been my understanding that straight threads are for joining and pipe threads are for joining and sealing. If I plumb with say.. CPVC, I would need to connect a transition adapter to the washer valve. The valve has straight threads and the adapter has pipe threads, so the valve would only screw about 2 threads into the adapter. This would almost certainly leak, right? What am I missing here?

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Old 09-04-2012, 02:26 PM   #2
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Washer Outlet Box Valves


The machine threads are for tightening the valve to the box only. More then likely, you're looking at valves made for copper- the pipe sweats inside the valve body.
If you want to use CPVC, you need a box w/valves specif to CPVC. Same goes for PEX

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Old 09-04-2012, 02:33 PM   #3
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Washer Outlet Box Valves


Quote:
Originally Posted by TheEplumber
The machine threads are for tightening the valve to the box only. More then likely, you're looking at valves made for copper- the pipe sweats inside the valve body.
If you want to use CPVC, you need a box w/valves specif to CPVC. Same goes for PEX
Makes sense. Thanks for clearing that up!
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