Replacing DW - discovered 1/4" PEX under sink?

Users who are viewing this thread

Cross-Eyed Cat

New Member
Messages
3
Reaction score
0
Points
0
Location
GA and NC
Hi All,

I'm awaiting delivery of a new dishwasher, and was looking to see what I would need to make the swap. Instructions for the new one call for a 3/8" OD supply line. When I looked under the sink, I found that coming up from the floor are what I believe to be 1/2" CPVC lines. Hot side is topped with a Brass Craft stop, which is then immediately topped with a brass tee that sends a 1/4" PEX straight up to the faucet, and another 1/4" PEX to the left for the DW. (Photo attached).

2013-02-26_13-43-47_141.jpg

Is 1/4" PEX normal for a kitchen sink faucet supply? Seems too small?

Is there any easy way to tell what the size of the outlet side of the top is? If it is 3/8, then I presume I could get a 3/8 x 3/8 x 1/4 tee and leave the faucet at 1/4 while upsizing the DW line. But if that outlet is only 1/4, would I be stuck with having to replace the stop? THAT would make me nervous, as this is coming up from a slab and I DEFINITELY do not want to break anything near the concrete level, especially since the old DW worked fine with everything as-is ... so, maybe I'm just making unnecessary work?

Any advice appreciated!

Susan
 

MTcummins

In the Trades
Messages
389
Reaction score
1
Points
18
Location
Pittsburgh PA
Looks like you have a tee with 2 3/8" compression fittings. The best thing to do, IMO, is remove both of these water lines and buy yourself the appropriate length braided stainless steel flex connectors. You can find them labeled in the home store for a dishwasher and for a faucet. Usually the only 2 variables will be the connection size to the shutoff (either 3/8" or 1/2", most, including yours from the look of it, are 3/8"), and the length of the line. If its labeled for a dishwasher, it should have the appropriate end connection or an adapter to make the connection to the d/w. The faucet end of those lines is standard size, any that's labeled for a faucet should work. Just don't get one of the "toilet" ones or something and you'll be fine.
 

hhplumbing

New Member
Messages
13
Reaction score
0
Points
0
Location
Victoria, BC
Website
www.householdplumbing.com
As mtcummins said, I would pick up a DW braided supply (we normally sell the brasscraft B1-72DW 6ft line). Now from that picture that really looks to be a 3/8" retro tee and if it is, all you need to do is take off the pex line going to the DW and thread on the braided supply by taking off the nut and metal sleeve.
 

Cross-Eyed Cat

New Member
Messages
3
Reaction score
0
Points
0
Location
GA and NC
I know those look like they might be 3/8", but the PEX lines coming out of them have 1/4" printed on them, which is why I am thinking that they are 1/4" -- in which case, I can't attach a 3/8" flex, right?

Thanks!
Susan
 

Cross-Eyed Cat

New Member
Messages
3
Reaction score
0
Points
0
Location
GA and NC
OH! Thank you so much!! A little ignorance goes a long way. :) That makes everything so much simpler. I would like to add a separate shutoff for the DW so I won't have to lose the hot water in the sink just to isolate the DW, but looks like I can do that right at the tee by adding a 3/8" straight 1/4-turn stop to the left.

Susan
 
Top
Hey, wait a minute.

This is awkward, but...

It looks like you're using an ad blocker. We get it, but (1) terrylove.com can't live without ads, and (2) ad blockers can cause issues with videos and comments. If you'd like to support the site, please allow ads.

If any particular ad is your REASON for blocking ads, please let us know. We might be able to do something about it. Thanks.
I've Disabled AdBlock    No Thanks