In a pumped radiator circuit, in long horizontal-ish stretches of pipework (say 15mm dia), what's the maximum typical rise/fall before air pockets become persistent (aren't moved on by pumped flow) and cause noise/gurgling, and before air locks prevent flow?
Apologies if this is a common query, but I've not figured out how to phrase the question such that I can get an answer via Google.
I'm expecting that it's something like >3-9cm for air pockets to persist, and >10-30cm for air locks to occur.
I appreciate it can depend upon the pump...
I'm considering the use of soft copper pipe, manually unwound from coils, which can end up being a bit wiggly, and moreover, I can't be sure the successive floors it'll be going along are all exactly the same height (and this is without intervening radiators to capture stray air).
Apologies if this is a common query, but I've not figured out how to phrase the question such that I can get an answer via Google.
I'm expecting that it's something like >3-9cm for air pockets to persist, and >10-30cm for air locks to occur.
I appreciate it can depend upon the pump...
I'm considering the use of soft copper pipe, manually unwound from coils, which can end up being a bit wiggly, and moreover, I can't be sure the successive floors it'll be going along are all exactly the same height (and this is without intervening radiators to capture stray air).
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