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 What's the usual shutoff valve size for kitchen sink?
Author: Velvetfoot (NY)

I'm thinking 3/8" compression?

Reason I'm asking is that I may add a non-softened line to an island sink. All the fixtures in the kitchen are hard-piped (copper) from 1/2" ball valves. I'll probably use stainless braided supplies, which come in several sizes. Bath fixtures are 3/8" compression.

Thanks.

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 Re: What's the usual shutoff valve size for kitchen sink?
Author: Wheelchair (IL)

1/2 ips x 3/8 compression or 1/2 ips x 1/2 compression

Best Wishes

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 Re: What's the usual shutoff valve size for kitchen sink?
Author: HytechPlumber (LA)

Most kitchen sinks have 1/2" copper lines roughed into the sink cabinet. The normal sink valve would be a 5/8" X 3/8" angle compression stop which is on mostly all the residential sinks I see.

Often though a tee may be installed with two indvidual "compression stops" installed.


I usually rough in 2 hot waters and 2 cold waters for kitchen sinks and also been noticing other homes with the same. Most homes use one hot water for the dishwasher. An extra cold water could always be used for a water filter system or an instant hot water faucet. (for coffee or tee)


... XXX . . . X

............................. Good Luck ....

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 Re: What's the usual shutoff valve size for kitchen sink?
Author: SwimRunPlumb (MI)

The normal Brasscraft compression valves for 1/2" copper are labeled as 1/2", not 5/8"

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 Re: What's the usual shutoff valve size for kitchen sink?
Author: Velvetfoot (NY)

Thanks. I'm still a little unclear. For the shutoff valve sweated onto 1/2" pipe, which would be more commone, a 3/8" or 1/2" compression outlet? Thanks.

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 Re: What's the usual shutoff valve size for kitchen sink?
Author: LemonPlumber (FL)

CR1900 or 1901.Brass craft dual stops5/8" compression on copper or cpvc and others x 3/8 compression supply tubing.I would suggest dual stop this type application when hiding ss tubing in unaccessible installs!!the shut off in the same room although not at the fixture local.



Edited 1 times.

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 Re: What's the usual shutoff valve size for kitchen sink?
Author: HytechPlumber (LA)

Thanks swimrunplumb for catching that and clearing up the line size. I don't want to confuse things anymore than needed.


3/8" would be fine for a kitchen faucet and is probably the most common size used with the stainless steel flex connectors.

... XXX X

.............. Good Luck .....................

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 Re: What's the usual shutoff valve size for kitchen sink?
Author: Velvetfoot (NY)

Thanks, 3/8" it is then.

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 Re: What's the usual shutoff valve size for kitchen sink?
Author: hj (AZ)

Here, the 1/2" x 1/2" is called a "slip joint" because it uses a 1/2" ips thread, which was traditionally used with a "cone washer" for the seal.

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 Re: What's the usual shutoff valve size for kitchen sink?
Author: hj (AZ)

Either, but a "soldered on" valve would the the rarity here, and in most places. But you use the same size supply tubes as on the outlet of the valve, whatever size that is.



Edited 1 times.

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 Re: What's the usual shutoff valve size for kitchen sink?
Author: SwimRunPlumb (MI)

I usually just put sweat shutoffs under the kitchen because I have the torch down there anyway putting in the 2 tee's for the dishwasher and hammer arrestor. I use compression everywhere else.

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