Hi all,

Having decided on a Glow-worm 30cxi combi, I have hit further problems.
It's to replace my Potterton Netaheat and associated tanks.

Problem 1: I don't know where the gas pipe goes into this boiler. Can
anybody advise? There are four pipes for heating and water, coming from
the floor, but nothing else. Could they be coming through the wall /
fixing jig at the back?

I need to know the diameter, to make sure that it's suitable for the
Glow-worm. I'm assuming that I can't just tell the diameter by looking
at the model of boiler.

Problem 2: The heating send / return pipes are 22mm. Glow-worm tell me
that they need to be upgraded to 28mm. Is there any basis for this
claim? If so, does this mean running new pipe throughout the flat? I'm
not sure where these 22mm pipes go to at the moment - the radiator pipes
are 15mm. It's an open system with header tank.

Hope that someone can help me unravel this.

Antony