hi yes it is a combi - eco tec pro 28 valiant also when I run any cold water in the house the pressure drops and then when the water is stopped the boiler sounds like it is refilling
hi, last week my boiler pressure had dropped and was 0.6, I have an ecotec pro28...a friend topped it up for me which was tricky as the valve (screwdriver one) wouldn't close again...the pressure is now 2.6 - help! also since then my water upstairs (boiler is in cupboard in bathroom) is tasting...