Click here to Find a Contractor in your area.
Welcome! Here are the website rules, as well as some tips for using this forum.

If you've found help here, check back in to let us know how everything worked out.
It's a great way to thank those who helped you.
Need to contact us? Visit

New Caleffi polymer manifold

RetrosPexRetrosPex Posts: 56Member
edited August 2019 in Radiant Heating
I'm hoping @hot_rod will weigh in, but any comment is welcome. I'm working on my distribution system, and bought a brass Caleffi 8 zone manifold. (inverted style) I'm going to buy additional ones for the rest of the project, and just saw the newer Model 671polymer ones. I have a few questions about them.

1. Are the adjustable flow devices interchangeable with the brass manifolds?
2. Will a Uponor 1/2 or 3/4 adaptor fit on the supply or return? The style that directly connect Pex type A expansion fittings? I see they have a quick release fitting adaptor of some sort.
3. Are they less expensive than the brass units?
4. Are they currently available? I searched for over an hour today, and did not find them for sale anywhere.

My thought is to buy one of the polymer units for some circuits that will only have Pex tubing connected to them, and no steel radiators, etc.

Thanks for any help that comes my way!


  • Cody350Cody350 Posts: 8Member
    edited August 2019
    The 671 series manifolds were actually discontinued last year.

    Let me know if you have any other questions.
    Cody Mack
    Caleffi North America
Sign In or Register to comment.


It looks like you're new here. If you want to get involved, click one of these buttons!