Hot Water Pressure from Combi very very low

[aim001]

Hi All, Can someone please give me some advice. I have a Worcester combi boiler ( oil fired). My hot water pressure has slowly got very bad, to a dribble. Th epressure gauge is normally around 1 bar. I picked up the expansion vessel and discovered it is full of water....is this normal or is this the problem.

many thanks...Aim001

 

[Mike Jackson]

The expansion vessel is on the heating circuit not the hot water so has no relevance to this problem.

You're looking at a blockage, possibly scaling of the heat exchanger.

Mike

 

[migoplumber]

need your boiler make to give further advice.

shaun

 

[stevetheplumber]

almost certain to be a scaled up domestic heat exchangerreal bithch to change on some older worcesters
exspansion vessel not relevant to this problem but yes it will contain water while the system is preasurised

 

[Pataing]

Just sorted a similar problem, removed ball valve from hot water pipe to kitchen sink and was rammed with scale. Likewise valves to other appliances. Worth a check at least.

 

[Starship1]

Same problem. check here.
http://www.ukplumbersforums.co.uk/plumbing-forum/2733-hard-water-area-heat-exchanger.html