They worked fine until I needed to change the circulator. Could not find an exact replacement gasket and Supply House was of no help. Ordered what I thought was the closet gasket and made by Grundfos. Center hole was a smaller diameter. Even so I tried to use them but they would not seal. The tiny circular flange area is laughable. I even tried tightening the flanges multiple times until they actually started to bend and they still leaked. I can also state that when they were brand new both of the shaft gaskets were leaking badly. I had to tighten the packing nuts multiple times before they finally stopped leaking. I'm replacing these with a fixed flange style because they will work with any standard gasket including the square ring seals that come with most circulators.
Tiger
Bakersfield, VT
5 months ago
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Great
As advertised, fast delivery
BD Heating
Skokie, IL
4 years ago
Verified Buyer
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A Great Idea.
These valves are extreemely space saving and I have used them for years on many boiler systems.
Boiler Fanatic
Van Wert, Ohio
6 years ago
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No
Worst flange valves I ever used. Just have a thin ring where it seals to gasket. Horrible design.
PH
WI
8 years ago
Verified Buyer
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