whats going on ARGHHH

[Centralheatking]

Sometimes things are not what they seem - now - gatevalves if there are any on the system might seem open fully but when they fail shear between the gate and the wheel head
shaft just where you cannot see.

It might be that one has sheared partly open/closed........centralheatking

 

[obseen16]

cheers for that central heatking, i was wondering if the pump valve had sheared half open but the spindles turned and stopped when the valve was fuly open so im guessing not, however i think i might take the pump off and have a look when i next go over there whilst the systems drained down. it wont hurt to look i guess 🙁