Need help with bulkhead fitting asap

[nanomania]

Hey guys im from india, this is my first time with bulkheads, its cpvc, they came with 2 gaskets. Here is what iv read online, but still confused...

1) add gasket only on inside of the tank and dont use any silicone.

2) add gasket on both the sides

3) silicone ur entire gasket and use it on the inside and nut on the outside

4) keep gasket on the indside and use silicone on the outside, then tighten with nut, let it dry.

5) use an industrial grade putty and seal on the outside.

Well guys i want a permanent leakproof seal, i dont mind using silicone and putty both. I also dont mind if the seal is permanent. Plz help.. here is wat i have.



Gasket is not of a good quality i guess
.

[Member No. 1]

Post a pic with the nut(s) off. I'm a little puzzled by your bulkhead.

Standard bulkhead - gasket on inside between flange and glass. No gasket on the outside. Hand tighten
nut, maybe a little more, but caution on overtightening. Be sure everything is super clean. I've used this method and never had a leak.
As far as silicone, typically it doesn't stick well to plastics.

[nanomania]

Originally Posted by Member No. 1

Post a pic with the nut(s) off. I'm a little puzzled by your bulkhead.

Standard bulkhead - gasket on inside between flange and glass. No gasket on the outside. Hand tighten
nut, maybe a little more, but caution on overtightening. Be sure everything is super clean. I've used this method and never had a leak.
As far as silicone, typically it doesn't stick well to plastics.

I feel the gasket is not of a good quality, but this is the best we get.



Also have this putty

[username in use]

Don't use any putty or silicone. Make sure the glass is super clean as is the flange on the bulkhead. It doesn't matter if you put the flange on the inside of the tank or the outside, all that matters is that you put the gasket (1) against the flange side, NOT THE NUT SIDE.

[nanomania]

Originally Posted by username in use

Don't use any putty or silicone. Make sure the glass is super clean as is the flange on the bulkhead. It doesn't matter if you put the flange on the inside of the tank or the outside, all that matters is that you put the gasket (1) against the flange side, NOT THE NUT SIDE.

Iv heard this everytime, can u explain y?

[username in use]

The gasket can't make a seal on the nut side because the water can travel along the threads between the pipe and the nut. Also, the spinning of the nut can distort the gasket further reducing the seal that it does create.

The flange side creates a full seal with no where for the water to work around the gasket.

[Member No. 1]

As stated, but from your pictures, it looks like you have some sort of hybrid bulkhead with a nut on one side, and a flanged nut on other side. Does the nut with the flange thread onto the center piece? If so you will need a gasket on both sides.

[username in use]

If it threads on both sides it will never seal fully.

[karimwassef]

It may be a friction washer behind a sealing washer.



You just pass the body with the sealing washer through the hole in the glass (flange in the wet area, pipe inside the dry side). Then the sealing washer goes around the pipe with outside thread on the dry side. Then tighten the nut.

Tightening the nut will pull the bulkhead against the flat glass surface to compress the sealing washer and create the seal.

No need for silicone or putty.

[nanomania]

A closer pic

[karimwassef]

It's just a bulkhead with an outside thread on the flange side. No different from what I described above.

[Member No. 1]

Originally Posted by nanomania

A closer pic

Can you supply a similar pic but from the other side.

[nanomania]

Originally Posted by Member No. 1

Can you supply a similar pic but from the other side.

[ca1ore]

OP is in India; lots of different plumbing codes/approaches in other countries (outside the US). Pictures show a perfectly functional bulkhead. As noted, with standard US bulkheads, the gasket goes with the flange always. As a matter of note, schedule 80 bulkheads here in the US usually come with a pair of gaskets.

[nanomania]

Originally Posted by ca1ore

OP is in India; lots of different plumbing codes/approaches in other countries (outside the US). Pictures show a perfectly functional bulkhead. As noted, with standard US bulkheads, the gasket goes with the flange always. As a matter of note, schedule 80 bulkheads here in the US usually come with a pair of gaskets.

Kool.. the gasket has few cracks..

[nanomania]

What problems can occur if gaskets are used on both the sides?

[outy]

Originally Posted by nanomania

What problems can occur if gaskets are used on both the sides?

There is no need. It makes it to hard to get the pressure right on the critical gasket that does all the actual sealing.


best advise I can give is to clean up the casting seam with a little sandpaper on the fitting itself where the gasket comes into contact. This will ensure no future leaks

[Member No. 1]

What concerns me with this bulkhead, is from the pics, it appears that the male threaded piece is a threaded tube, and both nuts thread on, unlike the type we see here in the US. If this in fact is the case, he will both gaskets and a sealer on the threads.

[karimwassef]

The bulkhead flange side just has an outside male pipe. Ignore that whole side, it's just a different attach to the rest of the plumbing. There's only one seal, and that's the gasket behind the flange.

The only reason for a second washer is to avoid the nut sticking and not turning enough to squeeze the gasket.

[Member No. 1]

To the OP, does the nut with the flange turn on the threaded center piece?

[karimwassef]

Originally Posted by nanomania

A closer pic

No separation - solid piece from this pic