I have some old central heating to upgrade. Some of the pipework is probably imperial. Can somebody kindly confirm that connections can be as follows:
Half-inch to 15mm : use an ordinary 15 mm compression fitting.
Three-quarter-inch to 22 mm : Use an odinary compression fitting but swap the olive to a special one. (BES part no. 9055 on page 142)
Am I right in thinking that this is fine for gas as well as water?
Am I right in thinking that I cannot use solder fittings, even for half-inch?
BES have a rather expensive part (no 7826 on page 141) specifically for joining three-quarter inch to 22 mm. Should I be using this?
Thanks in advance.
Geoff