[Gottawireitup]

When you put a new cut off valve on do you meed to use silicone tape or not? Or just pipe “dope”. I didn’t use either. Should I go back and use either of these things?






Sent from my iPhone using Tapatalk

 

[SPS-1]

Never heard of using silicone tape. Maybe you mean teflon tape.

But, to answer your question, depends on how your shut-off mounts.

If it is soldered on, then obviously no.
If it is a compression fitting (i.e with metal ferule over pipe or tube), then no.
if it has a straight thread and o-ring or gasket, then no.
If it has a tapered pipe thread, then yes.

Maybe some people have a preference of tape vs dope. I don't.

 

[de-nagorg]

^^^^^^^^^^^^^^^^^^^^^^^^^

See above.

Depending on how it attaches to the water line.

Tape is less messy, but takes Finesse.


ED

 

[Gottawireitup]

Never heard of using silicone tape. Maybe you mean teflon tape.



But, to answer your question, depends on how your shut-off mounts.



If it is soldered on, then obviously no.

If it is a compression fitting (i.e with metal ferule over pipe or tube), then no.

if it has a straight thread and o-ring or gasket, then no.

If it has a tapered pipe thread, then yes.



Maybe some people have a preference of tape vs dope. I don't.

I think this answer my question. Went to Home Depot bought a new one. The Plump Shop brand. I think it’s straight thread with the o ring. And yes I mean Teflon tape . What’s a tapered pipe thread just to know?


Sent from my iPhone using Tapatalk

 

[de-nagorg]

I think this answer my question. Went to Home Depot bought a new one. The Plump Shop brand. I think it’s straight thread with the o ring. And yes I mean Teflon tape . What’s a tapered pipe thread just to know?


Sent from my iPhone using Tapatalk

Tapered pipe, is the normal, average, everyday, standard, pipe used in most older plumbing.

ED

 

[SPS-1]

From the picture, could not tell for sure if there was an O-ring. So the rubber O-ring gives you the pressure-tight seal --- done.

Google "national pipe thread" also known as NPT. Very common in plumbing. Threads are tapered and gets tight as they screw together. Cheap to make, but the threads are never going to be perfect enough to seal pressure tight. So you need to put some form of goop on the threads to get a tight seal. If you needed dope or tape, and did not use it, you would know you had not done something right.

 

[Gottawireitup]

Oh I should add it was a rubber o ring, and then a metal washer. The rubber ring is first and then the metal washer. Hope I was supposed to use both the rubber and metal. I think that was the configuration on the one I removed (leaking albeit).


Sent from my iPhone using Tapatalk

 

[huesmann]

Tapered thread basically means the outer diameter of the threaded section is narrower towards the "tip" of the pipe. Helps you get the pipe threaded, then the wider diameter towards the body of the pipe helps tighten the seal.