steel pipe

In a bedroom of a 1930's house there is what I assume is an old capped town gas pipe. I assume that it was for a gas heater which would have been removed many years ago. The house has a modern natural gas supply to the kitchen only (ground floor), feeding the boiler and cooker. The bedroom is...

The photo shows the main junction of pipe work in our property and all my questions centre around the steel cold water feed pipe and its unions. The water comes from the meter, under another room about 4m run from the meter and emerges in this room behind this panelling. The water then passes as...