Recent content by billstokes

Thanks very much for your reply, Mick. The connections to the open vent tank are correct according to the advice I've seen, and heating engineers who've looked at it think it's OK. I'd have noticed if there was a leak other than a very slight seepage. There aren't any underfloor pipes, it's...

I have a c/h system with a Vaillant Ecotec Plus 418 system boiler. The boiler has one water circuit which is externally divided for rads and water by 2 motorised valves. The system is open vented. Most of the system is pretty old, was here when we moved in about 12 years ago, and probably dates...