Mystery Fitting: M# VWU-10

bob_46

I'll take a guess, B&G or similar triple duty valve.

Cheeze-Tech

Anyone Know of a Tee fitting M# VWU-10

I ran into a mystery fitting I wondered if anyone was familiar with M# VWU - 10. It is a tee located after the system pump (outlet side) which is pumping away from the boiler. There are three loops in the system. The supply line comes in the bottom of the tee, with one loop coming off the side of it and the supply to the other two coming off another. There is a 3-4" stem coming out the top with what looks like a % scale. They body of the tee is covered in asbestos so I can't get any other details off it. This is on a commercial system and the piping is around 2". My guess is it dates back to the mid 1960's. Long story, but we are having a serious system flow issue and wondering if the mystery fitting is related to it. Any info is appreciated.

Cheeze-Tech

VWU - 10

Yeah I call B&G after looking on their website, and the person I talked to just said never heard of one. No "let me check". Just "never heard of one".

bob_46

Triple duty

The number on the valve may just be a casting number and might not mean anything. If it's a triple duty valve it is a balancing valve, a flow control valve and an isolation valve. What color is the casting?

Cheeze-Tech

The only part of the valve I can see is the cap (top). I believe it was red. The M# comes from the stem. I had seen a triple duty valve on b&g's website, but am not familiar with them. My experience is with residential hydronics. Would there be anything inside it that could break loose and cause flow problems. I know a flow control valve has a float in it. The system pump acts like it is free wheeling. There was a short period where we did have good pressure differential across the pump, but then it dropped back off.