losing pressure with Ferroli Optima 901

Looks like you have a problem with the heating system - see the SealedCH FAQ.

There is probably a leak on the cold water main under the house. How much of a problem this is will depend on where it's leaking.

possible to by-pass the pipes that are in the ground or inside walls s that we don't have to start digging up

-- gillian

You might be able to narrow this down by listening directly to the pipework. Take a bit of wood of suitable length, how long depends how accessable the pipes are, place one end on the pipe or fitting and the other end other against you ear (the little flappy bit at the front bent over is useful for stopping the wood going up your ear canal). You should be able to hear the "singing" listen in various places from the street stop c*ck, internal stop c*ck, ball valves on tanks other taps etc. The louder the noise the closer you are to the leak. It's also possible to listen to the ground if you have a hard surface such as paving stones, concrete, tarmac or the like.

thanks Dave I'll try tha

-- gillian