Fitting Thread sizes
I have an Uponor EP heating manifold. The loop male thread connections are listed as R20.
I want to make sure, before ordering, that Caleffi Fitting 5/16" PEX Loop Fitting for Manifolds is compatible.
The supplier was unable to confirm. These are half the price of Uponor's and I need 10.
Thanks in advance for any help.
Comments
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It is my understanding that R thread is the same as — or very similar to — British Parallel Pipe Thread — BPPT. It is NOT interchangeable with NPT. Not sure what thread the Caleffi manifold uses ( @hot_rod ?)
Br. Jamie, osb
Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England1 -
Thank you, from the research and information I could find, I believe you are correct.
The only information on the Caleffi thread is : 3/4". no other information is provided.
Thanks again.
0 -
the R20 thread is a standard, straight thread, but the shape of the tailpiece and o ring can vary from brand to brand, where it seals into the manifold
The Caleffi has both a taper and o ring, so it is fairly universal
Also, the part that goes into the pex has a slight taper and an o ring for pex that may have a large id
Bob "hot rod" Rohr
trainer for Caleffi NA
Living the hydronic dream0
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