View Full Version : VS2 Balance Valve Q.
03-19-2009, 01:31 PM
Is the cup seal on these valves supposed to have a small hole in the top?
03-19-2009, 01:34 PM
sure why not, as long as there isn't a leak your fine
03-19-2009, 03:17 PM
But does it come stock like that?
I don't see how it wouldn't leak if there is a hole in the cup seal
03-19-2009, 03:54 PM
its supposed to be there and i think it won't leak since the valve pin is in the way
03-20-2009, 08:35 PM
I'm pretty sure there is, if it isn't leaking I wouldn't worry about it though.
03-21-2009, 08:30 PM
The hole is there for a reason. The valve pin has a channel drilled through it to channel pressure into the second chamber of the valve body. you cannot use a regular cup seal as replacement. There'a very small o-ring that seals the cup seal as well.