General Help With Replacing Shut Off Valve Under Kitchen Sink- Pics Included - Plumbing - DIY Home Improvement | DIYChatroom

Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Plumbing


Thread Tools Display Modes
Old 04-02-2012, 12:41 PM   #1
Join Date: May 2011
Posts: 276
Rewards Points: 320

General Help with replacing shut off valve under kitchen sink- Pics included

Hi guys, my parents had me install a new faucet in their kitchen sink. It works great and everything, but after the install the hot water pressure basically decreased greatly. The cold water pressure is fine, but I believe after I had turned off the hot water at the shutoff valve, something in the valve got messed up and is blocking the water supply. After turning the hot water valve off and on repeatedly to see if there was a difference, at times I would get really good hot water pressure, and other times I would not, all when opened completely. So something in valve is screwed up I believe. Now, no matter what I do, whether I open the valve all the way or I close it all the way, the hot water pressure is identical and remains low (meaning water even comes out now when the valve is closed). I cleaned out the brand new faucet's aerator after doing this and got a bunch of black junk, so something was breaking up in the valve (mineral deposits, maybe gaskets, etc).

Bottom line, I need to replace the valve, which I have never done before. I have included pictures below to show you my set up. Sorry for the poor lighting and photo quality, the pics were taken on my phone's camera.

My questions are, what kind of valve is on my copper piping? I have seen people unscrew other shut off valves online, and sometimes people cut the copper pipe. I would rather unscrew this one but it seems like there are no nuts on it. The top nut in the photo is from the new faucet line, and the bottom has no nut. So the big question I have is can I uncrew this valve and take it off my piping without cutting the copper pipe?

I would rather unscrew it and then install a new compression fitting, but it seems like there are no nuts to unscrew. Also, any suggestions on what valve size or type I need?

As you can tell, this is a very basic job but I have a lot of questions since I have very little plumbing experience besides solvent welding pvc together.

Thanks for all the help
Attached Thumbnails
General Help with replacing shut off valve under kitchen sink- Pics included-img_20120311_222347.jpg   General Help with replacing shut off valve under kitchen sink- Pics included-img_20120311_222406.jpg  


amodoko is offline   Reply With Quote
Old 04-02-2012, 01:03 PM   #2
Join Date: May 2008
Location: Near Philly
Posts: 2,375
Rewards Points: 1,668

Looks like 1/2" copper tubing supplies with the valve sweated on.
If you don't want to sweat, get a tubing cutter and cut off old valve. Then use a 5/8" Outside diameter (OD) compression x 3/8" compression valve to replace it.
It might be worth turning off the water and undoing the valve stem to see if you can just replace the washer inside it. Valves are cheap, get a 1/4 turn ball valve to replace the one you have if you go the replace route.


bob22 is offline   Reply With Quote
The Following User Says Thank You to bob22 For This Useful Post:
oh'mike (04-03-2012)
Old 04-02-2012, 03:56 PM   #3
Join Date: May 2011
Posts: 276
Rewards Points: 320

Awesome! Thanks so much for the help, should be able to get this done next time I see my parents. Take care
amodoko is offline   Reply With Quote
Old 04-02-2012, 04:14 PM   #4
DIY Enthusiast
sublime2's Avatar
Join Date: Mar 2012
Location: New Jersey
Posts: 1,115
Rewards Points: 504

They also sell sharks with shut offs.
Cut the pipe,push on the shark,connect supply line and your done.
Love them sharks!
sublime2 is offline   Reply With Quote
Old 04-02-2012, 04:34 PM   #5
Join Date: Sep 2011
Location: western Ny
Posts: 1,644
Rewards Points: 1,300

Shut off the main water, remove the valve stem from the valve housing (large nut on the side). Remove the bits of broken rubber washer from the valve internal port. Replace the small rubber washer on the stem and reinstall. This is a common problem on this type of valve if it has not been cycled for a while. When done, Remove the aerator from the faucet and flush out any remaining bits. You may have to remove the cartridge from the faucet to purge any bits out there also
danpik is offline   Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
leaking valve under the kitchen sink? cowboy dan Plumbing 8 04-02-2011 06:05 PM
unable to stop leaky kitchen faucet w/ new valve diy888 Plumbing 0 02-27-2011 08:45 AM
Kitchen Sink Moved - new kitchen sleepysmurf Plumbing 1 08-10-2010 06:38 AM
Replacing kitchen sink light fixture TrishaC Electrical 3 07-04-2010 01:14 AM

Top of Page | View New Posts


Search Engine Friendly URLs by vBSEO 3.6.1