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Old 03-15-2006, 01:50 PM   #1
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Plumbing question...not specific to Skoolies

Hi-

The inlets on the kitchen sink faucet look like 1/2" male NPT.

Can I just attach to them with what I've been using up to that point (1/2" PEX) with a 1/2" Female NPT transition fitting?

I guess the real motivating question is...is there anything special about "Risers" that would make them a necessity?

Thanks in advance--
Sean F

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Old 03-15-2006, 02:18 PM   #2
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Faucet connections

Most faucets have 1/2 inch pipe threads to connect to a water supply. In the package with the faucet there are some brass nuts and a couple of rubber/plastic parts, called cones that are used to connect the supply. The usual supply is a 3/8 line from the service valves under sink. Using 1/2 in may require a different cone and thin brass washer. In the housing world, service valves are used, but few RV conversions have same. I would think that a fitting reducing 1/2 pex to 3/8 inch would save a lot of adaptions.
There is nearly no advantage to having 1/2 tube as the restriction of water volumn is in the faucet set. The only method of increasing waster volumn and flow is to increase water pressure. Frank
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Old 03-15-2006, 03:04 PM   #3
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Thanks for the quick & in-depth reply Frank.

I ask because I have 20' of 1/2" PEX and want to avoid buying 10' of a different size if I can....since I'll only use a couple of feet of it.

I guess a question I still have is...is there any reason I can't use a regular 1/2" PEX -> 1/2" Female NPT to connect the water supply to the faucet?

This one:
Female Adapter 1/2" x 1/2" Female Pipe Thread


Thanks again
Sean (complete plumbing novice)
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Old 03-15-2006, 04:51 PM   #4
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Yep looks OK but

Some times there are other considerations. Pex is somewhat flexible but the tubing could move the faucet position. Out on the road, pex fitting maynot be easy to get for repair. Just a short 12-15 inch piece of 3/8 copper tubing is nice. If the plumbing is controlled at the sink with a switch, the service valves may not be necessary. On a few nice conversions, I have worked, the hot water was routed into the top of the potable/white water. This was done so every time the hot water was needed the water not hot in the line would not be wasted. The same method was used for the shower. Whatever tubing used should be held in place with some clamps or tie wraps... Frank
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Old 03-15-2006, 09:22 PM   #5
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OK, all of that makes sense. Good stuff. Thanks again for your insights.
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Old 03-15-2006, 11:33 PM   #6
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Quote:
I guess a question I still have is...is there any reason I can't use a regular 1/2" PEX -> 1/2" Female NPT to connect the water supply to the faucet?
No reason at all, mine are that way and work just fine.

Tom
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Old 03-17-2006, 02:38 PM   #7
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Gracias.
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