Can I cut few feet of the main line?

heatingFun

Plan to finish a family room in basement. cannot hide the water heating main line in that area. I am thinking about cut off few feet main line and hide those branch lines (refer to the picture please). is that ok for my heating system? thanks,

Gordan

It's not that simple.

What you've drawn appears to be a one-pipe hot water system, also called a "diverter tee" or "monoflo tee" system. The spacing between the supply and return tees (or, more precisely, the pressure drop) is critical to make sure that the system continues to work properly. There are ways to make this work, but it's not trivial.

heatingFun

thank you for your warning

yes, you are right. It is a monoflo tee system. How about if I keep the distance between the last supply tee and the first return tee when I shortent he main line?

Ironman

Your Drawing...

Is showing one rad piped mono flow and one piped parallel return. Which is right?



Are the rads above or below the main?

heatingFun

all are mono flow

All the cast iron baseboard radiators are mono flow setting. They are all above the main line.

Anthony Possidento

OK

I believe you won't have any problems.

Mark Eatherton

Monflo Installation instructions...

Things you wanted to know, but probably didn't...



http://www.bellgossett.com/Press/BG-monoflo.asp



http://www.bellgossett.com/literature/files/14.pdf



http://www.bellgossett.com/literature/files/602.pdf



http://www.bellgossett.com/literature/files/699.pdf



It has been my experience that air removal from the heat emmitters is the hardest thing to do with these systems. You can not force purge the system. Each radiator must have a high point vent, and the piping serving the emitter should pitch upwards (ever so slightly) to that point. Purging is done with all pumps off. In other words, bottom fill, top vent.



ME

heatingFun

thank you for your links

They are really helpful. I will read them all asap. thanks

heatingFun

thank you for your links

They are really helpful. I will read them all asap.

I have a question about the monoflow system.

in my original monoflow system the suply and return line was not connected each other at the end. Last year we converted oil to gas and moved the boiler from one end to another end, no other changes. The plumber connected the supply and return main line at the end. Which way is correct or better, make the main line a loop or don't make it a loop?

thanks,