How to replace with this with a stop valve

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distressed

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Hi,

I was looking under the kitchen sink as I have to replace the faucet. Instead of a stop valve, I found this (shown in the photo).
kitchen.jpg


How can I replace it with a stop valve?

This arrangement is in place so that RO intake hose can be connected to the cold water supply. I want to replace this entire setup with something like Shut off valve on Amazon. I will connect the faucet hose directly to the stop valve then.

Thanks for any inputs
 
You have to shut the water off and add a stop. I'm not sure what the question is. Get a stop and install it.
 
I would presume that is a stop valve, that may not operate. Have you tried turning the knob?

I have not seen one like that.
 
My doubt pertains to how do do I remove that connection. Just put a wrench to it and twist it loose? Does it look familiar even if old school ?

And replace with the type of stop valve I listed. Of course I will shut off the water supply to the house as the first step.
 
Its not a stop valve. there is no stop valve on the cold water line.

Subsequent to this device, there is a T-connection for water input to RO system and then the hose to the faucet is connected.
 
distressed said:
My doubt pertains to how do do I remove that connection. Just put a wrench to it and twist it loose? Does it look familiar even if old school ?

And replace with the type of stop valve I listed. Of course I will shut off the water supply to the house as the first step.
Click to expand...
The valve you linked isn't it.
 
distressed said:
Its not a stop valve. there is no stop valve on the cold water line.

Subsequent to this device, there is a T-connection for water input to RO system and then the hose to the faucet is connected.
Click to expand...
It is a stop valve. The round piece on the end turns clockwise to shut water off. It is old and not in the best shape. I would replace it.
 
To put in a replacement compression stop valve there are various ways.
1. The existing nut and ferrule can get reused. While I expect not all nuts and ferrules are compatible, many of the same size are.
2. There is something called a "ferrule puller". Use the search box to find discussion.
3. Cut the pipe. Remove the old label on the pipe, clean the pipe, and dress the end. Install a new compression valve -- preferably quarter turn.
 
Checked its operation. The round piece at the end, rocks a little bit when trying to turn it by hand but doesnt turn even a quarter turn.

Dont want to use a wrench without being sure about using it.
 
distressed said:
Checked its operation. The round piece at the end, rocks a little bit when trying to turn it by hand but doesnt turn even a quarter turn.

Dont want to use a wrench without being sure about using it.
Click to expand...
Your next action items will be to measure the OD of the pipe from the wall. It may be 5/8 inch (0.625) inch. That is called 1/2 inch copper. To measure that, a digital caliper is nice. You can also put a piece of string around the pipe. Mark where two spots meet. Stretch out the string, measure the distance between marks, and divide by pi.

Also check the smaller pipe going up. Expect 3/8 (0.375) OD. If so, that pipe would be called 3/8 inch compression. There is a change in convention at 3/8 where the nominal size is the OD.

Also expect there to be another valve on the hot pipe.
 
Chucky_ott said:
You probably want something like this https://www.homedepot.com/p/BrassCr...utlet-1-4-Turn-Angle-Valve-G2CR19X-C1/2020470

The supply line on your new faucet may be pre-attached and might not reach the valve. Regardless, it likely will use a 3/8" compression connector which you would connect to the 3/8" connector on the valve. You would discard the nut and ferrule in this case .
Click to expand...
The link didnt work.

How about using Compression stop valve and RO outlet fitting to connect both my faucet hose and RO system?
 
Reach4 said:
Your next action items will be to measure the OD of the pipe from the wall. It may be 5/8 inch (0.625) inch. That is called 1/2 inch copper. To measure that, a digital caliper is nice. You can also put a piece of string around the pipe. Mark where two spots meet. Stretch out the string, measure the distance between marks, and divide by pi.

Also check the smaller pipe going up. Expect 3/8 (0.375) OD. If so, that pipe would be called 3/8 inch compression. There is a change in convention at 3/8 where the nominal size is the OD.

Also expect there to be another valve on the hot pipe.
Click to expand...
Yes, I will measure the copper pipe for size before purchasing any fittings as well the size on the new faucet hose.

Regarding the hot pipe, there are two valves on it, one for dishwasher and one for faucet.
 
Reach4 said:
Your next action items will be to measure the OD of the pipe from the wall. It may be 5/8 inch (0.625) inch. That is called 1/2 inch copper. To measure that, a digital caliper is nice. You can also put a piece of string around the pipe. Mark where two spots meet. Stretch out the string, measure the distance between marks, and divide by pi.

Also check the smaller pipe going up. Expect 3/8 (0.375) OD. If so, that pipe would be called 3/8 inch compression. There is a change in convention at 3/8 where the nominal size is the OD.

Also expect there to be another valve on the hot pipe.
Click to expand...
Got a digital caliper. The size of the copper pipes in 0.62 inches or 5/8 inches OD.

Just to avoid confusion I will be buying 5/8 inlet and 3/8 outlet valve right?

Lowes and Home Depot have some valves which 5/8 (nominal 1/2) valves. Are these a fit in my project?
 
Chucky_ott said:
The stop valve you show is the same part I linked. Not sure why the link didn't work.

As for your existing valve, have you tried pushing or pulling out the knob before turning? Just a guess though.
Click to expand...
Well something must have loosened, the end cap now spins both ways. I was able to spin it 10 rotations in either way without any effect of water flow. Not sure what is going on. Pulling and pushing doesnt work. I am planning on replacing the thing with a contemporary stop valve.
 
Last edited:
At Lowes, https://www.lowes.com/pd/SharkBite-...3-8-in-Od-Compression-Quarter-Turn/1001851874 or even https://www.lowes.com/pd/SharkBite-...rass-Quarter-Turn-Stop-Angle-Valve/5014502985
The push-on valve needs the pipe to be pretty clean, and that would imply cutting off the old valve, and dressing the pipe.

At HD, https://www.homedepot.com/p/BrassCr...let-1-4-Turn-Angle-Valve-G2CR19X-C1/202047059

If ordering, I would consider this https://www.supplyhouse.com/Dahl-61...omp-Angle-Supply-Stop-Lead-Free-Chrome-Plated

When you replace a valve, you normally also want to replace the escutcheon. If there is no escutcheon, you can always add a split escutcheon later. I don't see an escutcheon in your photo.
 
Planning on getting Stop valve and RO outlet fitting. Can I use a deep socket and a torque wrench to pull out the ferrule? Or do I have to get something like ferrule puller?

Please advise if any other tools are required for replacing the stop valve. I was watching a video where a specific tool was being used to get the copper pipe rounded. Not sure what it is called.
 
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