1" PVC unions size issue C-457-010

lapin · Mar 14, 2022

I have plumbing thats about 7 years old. I need to replace a piece of equipment between 2ea 1" unions. I need to replace just 1/ 2 of the unions (the inner threaded part). I cannot cut the union and replace the whole thing because there is not enough pvc pipe to glue the other half onto. Spears and every manufacturer has reduced the overall size of these things making replacing 1/2 of it near impossible.
From what I found out Spears C-457-010 was the old number and they now use 457-010. This is much smaller overall and the 2 are not compatable.
If anyone knows of a place that has stock on the old part can you let me know?
The old part has a thread OD of 2.40"
The new ones have a thread OD of 2.14" which I cannot use
Thanks

Dburr1014 · Mar 15, 2022

Can you get a pipe union to make up the difference and then use the new one?
Edit: meant to say coupler

lapin · Mar 15, 2022

I wish ....The only way is to use 1/2 a union.

Sean Clark · Mar 15, 2022

What about using the coupling as suggested above and this socket/spigot union? I think you could fit it in the space you have.

https://www.supplyhouse.com/Spears-8056-010-1-PVC-Schedule-80-FKM-Union-2000-S-x-Spig

Saltyreef · Mar 15, 2022

lapin said:
I wish ....The only way is to use 1/2 a union.

I think what they mean is cut the union completely off the pipe. Then add a coupler and a small piece of pvc tubing and glue your full new union to that.

It would help if you showed us a photo of your dilemma so we could see what you are having a hard time connecting.
I understand youd like to use just the half of a new union to thread into your exisiting union but if this is not possible, let us help you with replumbing!

Sean Clark · Mar 15, 2022

I actually happen to have one. I took some photos that may help you see it it would work.

Saltyreef · Mar 15, 2022

I had this issue with a return pump where i glued the union flush with the outlet of the pump and the other end was on an eshopps flex line so i wasnt able to cut the union off the flex without having to order a new eshopps flex hose.
Maybe something similar going on here...

Sean Clark · Mar 15, 2022

Saltyreef said:
I had this issue with a return pump where i glued the union flush with the outlet of the pump and the other end was on an eshopps flex line so i wasnt able to cut the union off the flex without having to order a new eshopps flex hose.
Maybe something similar going on here...

Yeah, I am not entirely sure what the situation is but my impression was that they only have the length of the pictured part to work with in the space. That is why I suggested the socket/spigot union idea. More pics would help to understand a lot.

Dburr1014 · Mar 15, 2022

Saltyreef said:
I think what they mean is cut the union completely off the pipe. Then add a coupler and a small piece of pvc tubing and glue your full new union to that.

It would help if you showed us a photo of your dilemma so we could see what you are having a hard time connecting.
I understand youd like to use just the half of a new union to thread into your exisiting union but if this is not possible, let us help you with replumbing!

Yes that is what I meant

Saltyreef · Mar 15, 2022

Sean Clark said:
Yeah, I am not entirely sure what the situation is but my impression was that they only have the length of the pictured part to work with in the space. That is why I suggested the socket/spigot union idea. More pics would help to understand a lot.

Totally agree.

I like that spigot union myself

lapin · Mar 15, 2022

The issue is there will be nothing to glue any new part to, once the union is cut out of the plumbing.
The union is flush to a wall. I dont want to cut the dry wall open if I can help it.
Why the person plumbed this thru the wall without using threaded parts is beyond me.
Another issue is I cannot let any new glued connection dry 24 hours.

Sean Clark · Mar 15, 2022

lapin said:
The issue is there will be nothing to glue any new part to, once the union is cut out of the plumbing.
The union is flush to a wall. I dont want to cut the dry wall open if I can help it.
Why the person plumbed this thru the wall without using threaded parts is beyond me.
Another issue is I cannot let any new glued connection dry 24 hours.

Ok I think that I understand better now. The piece that is still through the wall is the part with the union coller on it. That can not be cut off without making a mess of the wall. That is why your options are limited.

Presuming that is correct, why couldn't you simply cut the union off and reuse it with new fittings? You have enough material there to glue another fitting on.

24 hours is not needed. 10 min and you will be more than good to go.