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Radiant PEX connections?
- Based on the description of my system, I was told I likely have an old/converted gravity system.
- The boiler is directly connected to the black iron pipe (BIP) trunk lines with copper. (See photo)
- I need to reconnect two radiators so I may have heat for the upcoming season.
- The 3/4" BIP connecting lines were removed because the connections need to be relocated up into the joist bay.
- There's a total of 8 connections with runs not more than 10 ft. from the trunk lines to the 3/4" BIP pipes going to the upper floors.
- I want to use PEX to replace the BIP (especially since I've cut up the BIP to use it elsewhere).
- Is there oxygen-barrier PEX-A compatible with expansion fittings available for sale and if so where? (I.e., I've search for it and can't find it so "yes" isn't a useful answer; I'm looking for a link to purchase.)
- Can oxygen-barrier PEX-Al-PEX be used with regular crimp fittings that I use on potable applications?
- Can oxygen-barrier EVOH PEX be used with regular crimp fittings that I use on potable applications?
- Lowe's offers oxygen-barrier PEX-C. Can this be used with expansion fittings?
- Lowe's offers oxygen-barrier PEX-C. Can this be used with crimp fittings?
- Should brass fittings be used in radiant applications to the exclusion of poly ones?
- I do not have the wherewithal to put a dielectric fitting on the existing connection (see photo) there right now (assuming they make them that big), but do I need them to connect from the BIP lines to brass PEX fittings?
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