Help with compression valve install

[star_man]

While trying to fix a leaky bathroom sink faucet, I noticed that the cold water supply tube coming out of the floor to the sink is CPVC, and has no shut off valve. I'm a DIY'er and have never worked with this material. I would like to install a shut off valve. Should I get a pro for this?

 

[Plumbs]

It depends on your level of comfort with cutting and gluing. I would not recommend using a compression valve, or any other compression fitting, on old cpvc because it can get brittle and crack.
The easiest thing to do would be to cut the CPVC with a fine tooth hacksaw or really sharp CPVC cutters. If you use the ratchet cutters try to go back and forth when you make the cut so the pipe doesn't crack if it's brittle. Make sure you bevel the end of the cut pipe. Then get a glue on straight stop. Use the orange lava CPVC glue with no primer to glue the new valve on. Give it about an hour and you should be good to go.

 

[Sponsor]

 

[Fitter30]

Being old cpvc use a fine tooth saw like plumbs wrote. Use primer
https://www.corzan.com/blog/the-dos-and-donts-of-cpvc-piping-solvent-cement-welding

 

[Terry]

Then get a glue on straight stop. Use the orange lava CPVC glue with no primer to glue the new valve on. Give it about an hour and you should be good to go.

Another option is to use a Sharkbite straight stop on the CPVC.

 

[Plumbs]

Being old cpvc use a fine tooth saw like plumbs wrote. Use primer
https://www.corzan.com/blog/the-dos-and-donts-of-cpvc-piping-solvent-cement-welding

You don't use primer with the lava cpvc cement. It specifies not recommended to use with primer. You can use it with other cpvc cements. All I use is lava cement since I do repair work. Back when I did new construction I used flowguard gold so I didn't need the water on within an hour or two.

*Edited post because I thought the label said not to use primer. It says not recommended in case anyone looks this up in the future.