worcester boiler 28cdi

[donametchi]

hi. my friends boiler is dripping water from the diverter valve assembly.it is also increasing in pressure at the gauge when the system is running i,ve checked the pressure in the expansion vessel and it,s 2 bar.the system is also blowing off occasionally at the tundish.before i change the diverter valve has anyone got any ideas.thanks donametchi

 

[ollski]

Not really the leaking diverter will almost certainly need a new valve unless you like endless ****ing about. Did you take all the pressure out of the system before you checked the expansion vessel?

 

[donametchi]

no the system was sitting at 2bar.would the system pressure rise if diverter valve was gubbed?

 

[Gasman1015]

The system pressure will rise whilst system is running , this is normal.

Pressure should be set at 1.2 bar

If yours is already 2 bar, then pressure relief will kick in when it rises to 3 bar.

Nothing to do with the leak on the divertor.

 

[donametchi]

if
the diverter valve is leaking.would the system still blow off via tundish?
or is there a secondary problem?

 

[Gasman1015]

Nothing to do with the leak on the divertor.

 

[pannierstan]

You need to check the expansion vessel with NO pressure in the system AND an open end.
That way when you start to pump the air in the water that is in there will have somewhere to go otherwise you end up with all sorts of crap reading.

Your expansion vessel is definatly flat or knackered

Stan

 

[ChrisR]

see the faq re pressures

 

[stavros007]

I had a leak on my diverter valve,had to replace the complete valve £80, not to bad - had it fitted in 30 mins - used to lose a lot of water per day,have kept old one to replace old o rings etc,plumber quoted £250 !!!
Boiler is only £700 new!!