Water valve replacement loose

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I am trying to replace the water valve under my sink. I am following all the dozens of videos I've seen online exactly, but the compression ring doesn't seem to compress. When I screw the valve onto the nut, even when it's from and fully threaded, the entire piece still slides right off the pipe. I have tried adding Teflon tape to the pipe and around the compression ring but nothing seems to work.

 

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Update: I used the old compression ring and nut with the new valve and was able to get it right enough to not slide off, but there a severe leaking behind the nut (not the valve itself), like basically spraying.

 

[RS]

Are you sure you have a ferrule in place? It should compress and grip the tubing and seal when you tighten the nut.

 

[ad233]

Are you sure you have a ferrule in place? It should compress and grip the tubing and seal when you tighten the nut.

By ferrule do you mean the gold ring that goes inside the nut? If so yes, but it doesn't seem to tighten and compress when I tighten the nut over it.

 

[RS]

Yes, the ring is sometimes called a ferrule. The old one should of been stuck to the tubing, is it possibly cracked?

 

[ad233]

Yes, the ring is sometimes called a ferrule. The old one should of been stuck to the tubing, is it possibly cracked?

The old one was removed with the old valve, but the new one doesn't seem to compress like it should when applied with the nut. And I've tried using the old ferrule with the new valve, and it does create a better seal then the new ferrule did, but still leaks significantly.

 

[Twowaxhack]

Take a picture for me of what you have. Video doesn’t play on iPhone

 

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Hopefully you can see those. Added them in the order of steps I am doing.

 

[ad233]

Take a picture for me of what you have. Video doesn’t play on iPhone

Okay adding pictures below.

 

[Twowaxhack]

Remove the Teflon from the threads

You have it assembled correctly.

You’re not tightening it tight enough or you have a defective valve.

 

[ad233]

Remove the Teflon from the threads

You have it assembled correctly.

You’re not tightening it tight enough or you have a defective valve.

OK I will try that! Thanks!

 

[Twowaxhack]

 

[RS]

Just in case your unfamiliar with what you're doing, you need to hold the valve body with one wrench while tightening the nut, otherwise you could twist off the tubing in the wall. I would use 8 or 10 inch wrenches, depending on how strong you are!

 

[Twowaxhack]

Just in case your unfamiliar with what you're doing, you need to hold the valve body with one wrench while tightening the nut, otherwise you could twist off the tubing in the wall. I would use 8 or 10 inch wrenches, depending on how strong you are!

No torque gets directed to the pipe to speak of. The brass ferrule bites into the pipe.

You have to hold the valve to tighten the nut and ferrule or the valve will spin with your nut and not tighten, you won’t break the copper.