When replacing an elbow pipe under the bathroom sink, what sort of cocking or cement do you use on the pipe?

Answer 1

None.

If it is the right size, just the seals will prevent leaks,

Answer 2

PVC DWV pipes are generally welded-together with PVC glue or have mechanical connections (e.g. threaded with nuts, compression fittings...). Metal fitting are usually mechanical. The tail piece from the drain, it usually held-in place with a friction nut and gasket.

Since drains do not have significant pressure, unlike a water supply pipes, they are not sealed.

If you are using PVC, make sure you have the correct cement for PCV materials (ask the clerk at the hardware store to show you).

The one area you will need to apply a sealant, is where the drain is seated in the sink. Before you slip the drain stem through the sink drain opening, you will need to apply a bead of Plummer's Putty (it's like play-doe).

Answer 3

Plumbers are expensive. It could cost somewhere around $100.00 to start. I suggest going to your local big box store, and getting the parts and doing it yourself. The P trap is very cheap, usually around $5.00 to $10.00 for the complete kit. The thing you need to know is what size do you need. The kitchen sink is usually 1 1/2" and the bath is the same except in older homes it's usually 1 1/4". The instructions are pretty vague, but if you ask the guy or woman at the store they will be glad to assist you. Everything is compression fit, so there will be no soldering.

Answer 4

Plastic elbows have built in gaskets and metal elbows have a plastic ring gasket that sometimes needs replaced if bad. The rings can be found at most good hardware stores in the plumbing section.

I use silicone caulk (not silicone latex) on the joints for good measure (works like a double seal) but if everything is good (or new) you should not have to use a any caulk.

Answer 5

On the drain to the sink, you use Plumber's Putty. You should not need anything for the elbow pipe - it should have a rubber O-ring or gasket.

And you mean caulking, not cocking!! LOL

Answer 6

It depends on what type of material the pipe is made from. Metal, probably copper - in which case you would solder it. If it's plastic, depends on whether it plastic, pvc cpvc, etc. You could use a general purpose PVC glue to do the job. Also, I assume by elbow you mean something other than the water trap...
Really need a bit more info..

Answer 7

replacing an elbow pipe does not need different cement but the trap layed should be the one as intercepting trap

Answer 8

I like 3M plumbers putty, you can get it in small amounts at the hardware store.

Answer 9

you use plumbers tape if needed but most of the time you just use the washer thats there for the seal.....

Answer 10

Use don't use caulking or cement...use plumbers tape.