Question about copper/CPVC union

[richbl]

Hello all,

I'm installing a spin-down filter off my 1" copper cold-water line. The filter body is 1" CPVC, and I want to use unions so I can disassemble the set-up for maintenance, access to the pressure tank, etc.

So, here's my question:

Can I take a brass/copper 1" union, toss out the brass MIPT, and marry the brass FIPT to a CPVC MIPT?

I'm aware that, per code, it's not wise to do the converse.

My concern has more to do with expansion of dissimilar materials.

Thanks much.

[Mikey]

The filter body is FIPT? I'd use a brass/CPVC transition union -- the seal is made by an internal rubber washer. Then on the CPVC side, just use a male adapter. The pros can elaborate or offer better solutions, probably.

[richbl]

The filter body is FIPT? I'd use a brass/CPVC transition union -- the seal is made by an internal rubber washer. Then on the CPVC side, just use a male adapter. The pros can elaborate or offer better solutions, probably.


I had originally considered going this route, but for 1" copper, it seems I'm very limited in what I've turned up so far (if you can post a link to the 1" trans union that you recommend, I'd be much obliged).

To clarify, the filter body is CPVC slip (no thread), and I want to transition to copper with the ability to disassemble as needed (the water point-of-entry is right in front of the pressure tank), hence the need for a union. In the best of all worlds, I was looking for a 1" CPVC SPG trans union with brass threads, but I haven't turned up something with that diameter.

Thanks.

[jadnashua]

What about a Sharkbite slip fitting?

[Mikey]

Genova 53046:

http://www.amazon.com/1-Union-Slip-Brass-Fip/dp/B000I1EDPO

full catalog at

http://www.genovaproducts.com/docs/PlumbingCatalog4-07.pdf

I would rather have found a slip/sweat, but struck out. You could call Genova at 1-800-521-7488 and see if there's anything better available.

[richbl]

What about a Sharkbite slip fitting?

Honestly, I'm just not a fan of compression...anything. Maybe it's just an irrational thing, but I just don't trust 'em. :)

That said, given that the 1" trans union that I'm looking at runs @$30 (and I need two of them), it might make sense to give these new-fangled fittings a try.

In any case, thanks for the suggestion.

[richbl]

Genova 53046:

http://www.amazon.com/1-Union-Slip-Brass-Fip/dp/B000I1EDPO

full catalog at

http://www.genovaproducts.com/docs/PlumbingCatalog4-07.pdf

I would rather have found a slip/sweat, but struck out. You could call Genova at 1-800-521-7488 and see if there's anything better available.

Ahhh... there be the beast.

Ouch, certainly not a cheap hunk of metal.

Thanks for the pointer.