Wirsbo Manifold

Eryn

I have 7 pin valves in this manifold that are seized.  Are these valves the ones that are obsolete or can I still get them?  Doesn’t say Uponor on the manifold or any numbers so not sure. Any help appreciated! 

EdTheHeaterMan

Have you tried exercising those valves?

Eryn

Yes.  They are seized pretty good. 

hot_rod

They are very hard to push down, you can’t do it with a finger. Try the side of a hammer or linesmen pliers, some flat hard surface. It’s rare for them to freeze solid.
Yes you can buy replacement assemblies.

Eryn

hot_rod said:

They are very hard to push down, you can’t do it with a finger. Try the side of a hammer or linesmen pliers, some flat hard surface. It’s rare for them to freeze solid. Yes you can buy replacement assemblies.

This is one of 5 manifolds.  The other 4 manifolds I am able to push the pin.  The 7 on this one are seized on the down position……will try tapping on them as you advised.  Would a little bit of wd40 be a bad idea? 

hot_rod

Loosen the upper brass hex nut. That is a packing nut. Then try some WD 40. A vice grip to try and pull the pin up.

You would need to drain the system, but you could remove them all and clean the stems of scale deposits.

hot_rod

Different brand, but they all assemble the same way. A scotchbrite pad is on way to clean the stems. Remove the spring clip and the stem can be completely removed for cleaning.

The tiny O-rings, under the spring, can get hard or go bad, then the stems will leak. A few folks here have found replacement O rings at auto parts stores.