WEIL-McLAIN CGA Repair on Monoflo system.

[@khw71471]

Beautiful repipe!

[@doug995.]

The pump and zone valves are normally better on the return side of the boiler as the water is cooler on the equipment. Good job.

[@Rainmaker88]

Debateable if that was ever the case but now a days there’s 0 reason to not pump away

[@johnguerrero4305]

Why are all plumbers stuck on having the circ pump on the supply?!!! I swear it drives me nuts!!! Weil McClain clearly lists two locations on their boiler, you can have the circ. Pump: on the supply and on the return. They will re-pipe the whole boiler to make sure the pump is on the supply!! In 35 years of installing boilers, I’ve never installed a pump on a supply and I’ve never had flow issues! Please stop!!!

[@jeffreyjohn2037]

It doesn't matter where the circulator is. Just make sure that you have a good air separator.

[@JamesSmith-rl7nb]

Bas location for make up water??? Injection should be on supply line after pump discharge to insure air removal from purge station on return line or pump inlet

[@jeffreyjohn2037]

You obviously don't know what you're talking about. Regards, third generation oilman guru and steam heating contractor.

[@ianwilson1986]

I need this set up only difference is my pump is on the supply

[@moresmores9172]

do monoflow systems with finned tube baseboards react well to purging or dou you have to vent each baseboard?

[@jpheatingcoolingllc.6620]

It depends on the purging setup and how large the system is. On this system I was able to purge all the air at the boiler because I setup the purge the way I wanted it and the system itself was small. But most of the times on a repair the boiler has a basic purge setup that is pretty useless so it usually requires purging each loop at the radiation to get all the air out.

[@ML-lg4ky]

What was the complaint for changing the piping? Airbound?

[@jpheatingcoolingllc.6620]

Yes

[@mikev.1034]

👍👍

[@stifflers69mom1]

Dose a mono flow system mean that it’s only one zone?

[@ML-lg4ky]

No Name mono flow is the term used for special fittings that feed supply and return water to the emitters off 1 loop.

[@stifflers69mom1]

Mike L thank you

[@stevestratton1888]

After the repiping you did on this boiler you probably wouldn’t even have to purge, the new air separator and pump location would most likely be enough to eliminate any air in the system on its own.

[@jeffreyjohn2037]

Wrong. You must purge the system. You 🤡