have you ever seen one of these?

pardon_my_ignorance

I ran into a "Flow Stat, #400" manufactured in Brooklyn, N.Y. I've never seen one and wonder if anyone can tell me more about it and it's function/operating features. It was originally installed sometime in the early sixties. A Taco 571 valve, with t'stat, is immediately downstream from it, but don't know if they are competing with each other (the taco could have been a later add-on). thanks

STEVEusaPA

Do you have a pic. Sounds like a check valve.

pardon_my_ignorance

i do have 2 pics, if i can figure out how to send them to you

Ironman

pardon_my_ignorance said:

i do have 2 pics, if i can figure out how to send them to you

Click on the portrait icon above the dialogue box to upload pics from your device.

pardon_my_ignorance

here is a 2 picture file. thanks for your input