Monoflow Tee questions???

Tim_50

I have a diverter tee system that I re-configured last year. I moved 2 radiators to adjacent walls and completely removed 2 others. I capped off the 4 tees from the radiators I removed and installed regular tees for the 2 new radiator locations. All the existing and newly installed radiators heat up as they are supposed to do.

I would like to add 2 additional radiators to the system and want to confirm that I should use monoflow tees and not regular tees, even though regular tees seemed to have worked for me the last time????

How can I identify if the existing tees in the system are monoflow tees? Are there special marking I should look for?

Also, should I remove the regular tees that I installed last year and replace them with monoflow tees even though they seem to work?

Thank you in advance for your help.

Brad White

Case of Mono?

Flow?

I would have to see a diagram for me to get a better picture, but can offer this:

If you remove a radiator from a diverter-tee system, you should interconnect the pipes with a bypass. This bypass will allow the system to think it is still serving a radiator and the flow split will keep the pressure drop down. To not do this forces 100% of main flow though the tees without a break. These add up. One or even two may not be a problem but to remove without bypassing will have an effect on system hydraulics in some way.

I am not certain if you have true brand-name Bell and Gossett Mono-Flo tees. If you do, there is a flow arrow and a red ring. The red ring goes toward the middle of the two pipes. If you use two Mono-Flow tees for a high-resistance branch, the rings face each other.

If you have another brand, you will have to look. You may ALSO have an insert cone placed into a regular tee. These common fittings are soldered in place and look like a regular tee from the outside. They are the bane of troubleshooters... you have to cut the pipe absent an ultrasound....

But the bottom line is, if you are getting flow out of standard tees in a diverter tee system, I would think that the supply tee and return tee have some intervening tees between them. Standard tees without much restriction between them would not divert flow to the branch otherwise.

If you have this condition, sell tickets priced somewhat lower than a trip to Lourdes.