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Pex-al-pex to CI radiators
Fred Rappuhn
Member Posts: 107
When running pex-al-pex to cast iron rads, what is the preferred method? Connect the pex directly to radiator. Or use a transition piece through the floor like as pipe nipple and have the pex connector under the floor. All my supplies will be through the floor, some will have no access from below.
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Comments
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Please explain this better: " All my supplies will be through the floor, some will have no access from below." What about your returns?0
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Supply and returns on first floor has access from below in basement. 2nd floor I will have have to cut floor for access. Concerned about a connection that would be concealed if I connected to a pipe nipple as a riser. Do they make a decorative sleeve to cover pex? Guess I should mentioned the returns!!
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How far off the floor? If the connection is short or close just run the tube right to the radiator. Protective sleeves if you like. Should be able to find the PAP adapter or connector to a valve.
If the rad is up off the floor a foot or so, copper tube will be a straighter option, connection below floor is not a problem with the correct fitting.
PAP direct to the rad eliminates a transition fitting.Bob "hot rod" Rohr
trainer for Caleffi NA
Living the hydronic dream0 -
It might be less trouble to cut the ceiling below those second-floor rad connections, rather than the floor above. Might be easier to repair.—
Bburd0 -
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