Roger wrote:
The message
from "Tim Downie" contains these
words:

We don't have a smell of gas (unlike the time another BG engineer
who supposedly had tested our system cocked up) but I've decided to
invest in a manometer to see if I can isolate the leak.

What sort and where from?

A Monument one like this one.

http://www.amazon.co.uk/gp/product/B...F8&me=&seller=

I got mine in B&Q (same price) but if you get one there, make very sure that
the rubber connecting tube in in the pack with it. Two out of the three in
stock in my local store were missing their tubes. (Light fingered plumbers I
guess).

Tim