Relocated Radiators on Monoflo system, not getting heat to moved

Joe becker

Brad, thanks for your reply
Each radiator has it's own set of T's.
Zone 1 now has one original radiator and one 17' base board cast iron radiator that has 20' of 3/4 pex tubing from the 1"x3/4 T's
Zone two I added two radiators from existing T's, each about 20'
I had a local plumber here, said my pump is under sized it's a 007, I bled about a gallon from zone 1 and started to draw some heat but did not get as hot as it should, same result from zone two, bled alot of water (no air) and drew some heat, but it did not get hot.
What do you think about upgrading the pump ?

Joe becker

Monoflo systems

I built an addtion to my house, relocated 3 radiators by running longer lenths off the T's to the new radiator location(20' +/-), bled the air out but not getting heat to relocated radiators.I have 4 zones, zone one LR,DR. Relocated DR radiator. Zone 2, relocated 2 radiators and they don't get hot, existing ones do, zone 3& 4 are good

Brad White_141

Distance

The distances to the new radiators is longer than the pressure differential generated by the monoflow tees. This may be one case where you need a monoflow tee on both supply and return, not just on return. Do the three new radiators share a set of tees or does each radiator have it's own?

If your existing main is "loaded" and a new set of monoflow tees might be too much in series, you might also split the new radiators onto their own zone with others of similar occupancy.

One hopes the new more remote radiators will share a zone with others of like distance and pressure drop. Freed from sharing flow and pressure with the others, these new remote radiators have a chance to perform. You got it, though. It is not likely an air problem.

Joe becker

Distance/monoflo system more info

Thank you for your reply, zone one has onlt the LR and relocated DR cast base radiators(small zone) Zone 2 feeds 3 BR, 2 existing baths, plus 2 relocated units. My supply is 1" x 3/4 T's. I ran 3/4 od pex to the new locations eliminating 90's.I had a local plumber here and said "maybe" my pump is under sized, I have a "007" feeding 4 zones.( It's been working good now for 8 years)I took about a gallon or so of water and did draw some hot water to zone one.What do you think of upgrading the pump ?