Rob R. wrote:One thing I should point out, "Monoflow" is the trade name of the system that Bell & Gossett developed. The technical name for this type of system is a diverter tee system. Taco had their own version of this, and there might be others.
Ron, my uncle's house has a system very similar to yours. His has a 1.25" line that comes out of the boiler and goes all the way down to the opposite end of the basement, from there it splits into two 1" lines which follow the perimeter of the house back to the boiler. If you wanted to control each half of the loop independently, you could do that with two zone valves and two thermostats.
Rob you are right I was wrong as mine also splits into two 1" loops, not a 1.25" and a 1" as I stated before. When my grandparents bought this house 50 some years ago there was a gas boiler with a big red Bell & Gossett circulator and one thermostat, The B&G has been replaced with a Taco.
As of now the left loop goes to the bedrooms, laundry room and bath room and it also has 3/4" loop going to a radiator in the basement. The right loop goes to the living room and then the dinning room. I want to make the right loop zone 1 and the left loop zone 2. As the bathroom is last in line on the left loop I am going to cut it out and make the bathroom zone 3 because I want the bathroom hotter than the bed rooms. Zone 4 will be the radiator in the basement I will make it a dump zone for the COAL GUN .
The spa room will be zones 5 & 6 do to its size and the fact I heat the spa and the swim tank with home made heat exchangers I will install two zones in the spa room.
Each zone will have a circulator and a thermostat as needed, I am going to use circulators instead of zone valves as I have the circulators.
Can I make a 1.50" "manifold" coming off the boiler and take each zone off of it with a ball valve before and after each circulator ??