Hydronic piping layout

brwmst

I am remodeling my basement, and want to add a new zone to

my existing hot water baseboard system. 

My question regards piping. There are two door ways that need to be

navigated to complete the loop. In past discussions I have been told that I can

not run pipe over one door header, then back down and over a subsequent door header.  Is this correct?  I do not have an issue cutting the slab and running

the copper through an insulated chase.





Any input would be greatly appreciated.

icesailor

Hydronic piping in cellar:

What reasons did they give you for it not working?

I'd like to know what I have been doing for years thatworks and doesn't work now and what changed.

brwmst

Justification for issue

The answer I received was vague and had little to do fluid

flow theory and mechanics.  Insufficient

pump head was not mentioned either. I was told that would add excessive noise.

Nothing relating to hammer, cavitation, just noise.  If this is completely unfounded and you have

had numerous successes running pipe up and over doors, I will gladly do it.

NRT_Rob

the only reason I could think of

is that they could be air traps if you had air problems.



Good purging and a good quality air separator along with good "pumping away" practice could make that a non-issue.

brwmst

Pumping Away

Thanks everyone for the input.



What does "pumping away" refer to?.

kcopp

Pumping away....

means to have the system circulator pumping away from the extrol/diaphragm tank. This arrangement is better because it allows the system to run at a pressure that will keep air more or less in solution and not bubble out into the piping creating air locks and noise. Many systems are pipied w/ the circ on the return side of the boiler effectively pumping  toward the extrol tank.