Interesting Monoflo Question

Uni R_2

"Q: Could I turn the diverter tee around so the cone points toward the flow and use it as the first tee instead of the second?

A: You could, and it will work because the same principle applies: the diverter tee increases the pressure drop along the main and creates flow in the branch.

However, with the cone facing into the flow, the water will be a bit more turbulent and, if you're using enough tees, you might have to use a larger circulator to overcome the additional pressure drop caused by the turbulence. That's why most old-timers put the diverter tee on the return side with the wide end of the cone facing the flow."

Unknown

Just wondering,

I have a 2 zone M/F system w/CIBB. I use H/B V110 ZVs and each main is 1" steel pipe.
The system was originally installed w/supply side(cone facing flow) single M/F tees.
I`m installing(finally) my own Prestige boiler and was wondering if anything (other than reducing any velocity noise) would be gained if I reversed the flow along the mains?
It should still work, but if nothing be had I`ll leave it that way.
Thoughts?

Dave

Big Ed_4

Monoflow

I always put the tees on the return because I was taught it works better. Never knew the reason ( noise you say). But seen them installed on the supply with no problem.

What I would do if there was no problem before ,is keep it flowing in original direction. Just to play it safe.

I would also change it to two circulators and ditch the zone valves at this point.

Bruce_26

Return Side

As I recall, return side installation of the Monoflo or Taco venturi was the recommended location in the 50's. The location on the return should give you a higher BTU output. There are tables to compute the BTU output based upon the circuit and branch diameters and other variables. I always thought that they were an elegant system that required some thought and preparation prior to installation.

Unknown

Thanks guys,

ya I know monoflo`s are better on the return side, but was just curious if anything would be gained otherwise.
Was just wondering.

Dave

Ken Field

Might be my imagination

but I seem to have less air problems in baseboard and convectors when the tees are on the return side of the radiation. I think it could be because the first tee looks like an an air scoop.

Ken F.

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