Are all unions created equally?

PAXpress

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Wondering if the union on something that is a "true union gate valve" or something like that could be unscrewed and added to an existing union? Aka could I add in something like a true union gate valve to a system that has a union in place in that spot without cutting or gluing anything? Or are all unions slightly different and it wouldn't create a good seal?
 
I do not think all unions are created equally...the unions I get form HD are different than the ones I can get at my local hardware store.

I think the best approach would be to assume you're going to have to cut and glue, but check the fittings of the union on your gate valve and maybe you'll get lucky.
 
If you can just bring a piece to the store and check the fit there.

Well I have the unions in place in my system and was thinking of buying a true union valve to go into place there but as assumed probably wont work. And the item is only online and I have the unions in my system already just standard lowes ones. I've got an alternate method tho, so I'll just do that. Thanks!
 
I do not think all unions are created equally...the unions I get form HD are different than the ones I can get at my local hardware store.

I think the best approach would be to assume you're going to have to cut and glue, but check the fittings of the union on your gate valve and maybe you'll get lucky.

i've run in to this as well. specifically the threads did not match up for me on unions i bought from Home Depot versus existing ones i had from Lowes. i assumed this is due to different manufacturers?
 
i've run in to this as well. specifically the threads did not match up for me on unions i bought from Home Depot versus existing ones i had from Lowes. i assumed this is due to different manufacturers?

Makes sense. Probably different manufacturers I was afraid the o ring wouldnt line up so I'd plug in the pump and PSHHHHHHHHHHH water everywhere.
 
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