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Copper tube thickness for near boiler
rsilvers
Member Posts: 182
in Oil Heating
I see that black steel 1-1/2 is about $8 a foot. Copper L is $10. Copper K is $15.
Which copper would you use to connect the boiler to a hydro separator and then to make manifolds to feed the zone pumps? L or K?
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Comments
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I use type m cu. Are you sure you need 1.5" piping?0
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If I used 1.25 inch I would have about 4.75 fps of water velocity and extra head if I used a 20 degree delta. It would work but the boiler has 1.5 inch threads.
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1-1/4 type M would be workable,a 25 delta would be an option also to lower the flow rate a bit. Nothing sacred about a 20 delta😗Bob "hot rod" Rohr
trainer for Caleffi NA
Living the hydronic dream0 -
I know. 4.6 fps if I do a 20 degree drop.It’s ok, but at the edge. I may end up doing a 25 degree drop but won’t know until it is done and pump settings are being programmed. It’s hard to calculate as it will be outdoor reset.0
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The are some engineers that will push 5 fps velocity in hydronic systems. Above 5 you start to get some hissing noise. Like when an outside faucet is running full flow.Bob "hot rod" Rohr
trainer for Caleffi NA
Living the hydronic dream0 -
There is certainly no reason to use type K copper; that is heavy wall, normally used for underground service.—
Bburd0 -
Yeah. I learned that is the case. I bought L.
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