Recent content by Mike Drew

Hi Fitter. Yes, green lines go to the ceiling and are the same that we’re labeled red and blue in the prior pictures. Only difference since those pictures is the direction has been reversed, so what was red is now the return, blue is supply, and all arrows should point the other way. When you...

Dana, thanks again for your help here. After 2 separate additional visits the install folks said the system needed to be switched back to its original direction. With that done the pumps run MUCH more quietly now, and system performance is maybe marginally better. But it still feels like a...

Closed the valve to the basement loops tonight and cycled through the various pump settings. No noticeable change to the system. Water still only getting to the system pump at 90ish degrees

Thanks Fitter. I’ll close off the basement loop and see what impact it has when I get home tonight. The B and C radiators (new basement radiators) do both heat up. They reach essentially the same temp as the upstairs rads. The B and C radiators are below the monoflow main. They’re floor level...

The T's are all wrapped in asbestos insulation, so I can't verify the directions of the arrows. The existing pumps have 3 settings (L/M/H) but I've tried all combinations between the 2 pumps with no meaningful difference in results. As to why is this my problem, you're right. I 100% plan on...

Thank you Dana and Fitter for your responses! Dana... I may not be following 100%, but I'm pretty sure the system is set up with 1 common supply and 1 common return, with all of the supply after the hydraulic separator. I've added 2 new pictures that hopefully give a better view. In both...

Hello! Apologies in advance for the long post, and thank you so much for any help provided! My home has 10 main floor radiators and 1 basement radiator, all cast iron and all fed by a monoflo system. We just had an old 1940's radiator (roughly similar to this one) replaced by a Navien NHB-80...