Good point we've found a few local engineers on the gas safe site that are qualified to work on unvented so will give them a ring in the morning.
Cheers.
Hi
We have a megaflo cylinder and today noticed our heating hadn't come on. Checking the cylinder the pressure was almost zero and there was a slow drip drip drip leak from the top of the black plastic component - does anybody know what this is and why it might be leaking?
Many thanks.