How do I remove the shutoff valve underneath my kitchen sink?

Question

In the process of replacing my kitchen faucet, I discovered that I need new shutoff valves. Do I loosen the big nut that is closer to the back wall or the body of the shutoff valve?

Answer 1

the nut at the back is correct leave it on the pipe with the ferruleinstall new valve dont use new nut or ferrule. you dont need to reef on it its already had the ferrule set just has to be tight
use two wrenches
attatch supply tube to faucet tighten your done

turn off water first and turn on again slowly have someone watch and shout if its spraying all over the place.

if no leaks your good. there are sweat valves and threaded valves but sounds like you have compression. if the handle of the valve is at the front water comes in back and leaves out top its a CR19C
if the water comes in back and goes out the front and handle on top or side its a CR14C
C means compression.

Answer 2

You shut off the house supply first... and bleed off all the pressure at a lower spigot, like the one outside the kitchen in the garden. And, you run the hot water in the kitchen, and in a tub.

Then, you "measure twice, and cut once" you make sure you have new parts and complete service sets cuz, some of the old stuff is going to be brittle and break! look at the parts you have, and pull it apart where those can fit in. Everything will assemble by hand, using teflon tape, or sealant, as required, and tighten down carefully, in accordance with accepted standards.

Then turn on the main with someone watching for leaks.

Answer 3

Why do you need new shutoff valves? If they're not shutting off the water completely, replace the innards instead.

With newer houses replacing the valves may not be much of a chore, but in older houses they will be a (oh my dirty mouth) to remove.

Answer 4

My first question (because I dislike doing unnecessary work) is why do you need to replace the shutoff valve? (They seldom need replacing. There are three common types of valve connections. Threaded, soldered (called "sweat") and compression. It SOUNDS as if you have compression but given what I deduce about the amount of knowledge of plumbing from your question, more information is required to be certain. Find a good home repair manual and read and heed.