Plumbing Question

[Jewel]

My Plumbing has been dismantled, I have a question about a PVC Union 1 1/2 inch, When you unscrew the union or take it apart the side with no threads has a rubber 0 ring its approx 1 1/2 inch, now the other part that screws into the Union has a groove near the outside of the fitting. My question is, is there supposed to be an 0 ring there as well?  I bought the tank from another guy and am not sure about the unions. If there was a site that was AN Anatomy of a Union I'd know LOL

 

[yveterinarian]

Could you post a picture of the plumbing so we can see what you mean?  Sometimes, I have trouble visuallizing 

 

[Jewel]

OK  So the left flange has an O ring, should the right one have one as well[/img]

 

[Duke]

nope your good, make sure the flat edge is nice and dry when you tighten them up and your good to go.


edit..


actually looking at your photo thats a tough call, my unions only had 1 o-ring on one side.. that one looks like it could use 2 o-rings.

 

[nitro069]

yeah, hard to say. one o-ring should work it tightened enough, but if you look at the side with the o-ring in it you can see the same impression that is created where the o-ring sits on the other side.

 

[nitro069]

I'm curious that if it was to have a second o-ring on the outside,  would create stress or pull on the union not having it there.?

 

[davesolo29]

all of my unions only have one O ring.

 

[Poseidon]

Ya only one oring here too, maybe it's the deluxe version, lol

 

[Jewel]

Deluxe sounds good, all the unions on the tank are this way, I just thought something was missing but I guess not, thanks for the replys

 

[nitro069]

found this pic here. clearly shows the two grooves with only a o-ring in the center groove.

Found it here http://www.aquasythe.com/Products/PVC-Union-Fitting--SLIPxSLIP__PL-PVC-UN-S.aspx
and here http://www.thepondguy.com/product/547/fittings