We have a problem with an old Victorian pipe that's leaking. The pipe comes from a reservoir, runs under our house, and used to feed an old swimming pool which was decommissioned, as far as I know, in the 60s. The reservoir is not on our property, and the site of the old swimming pool is also on someone else's property. The pipe is definitely not used any more, but seems to be full of water and leaking. It's about
1" diameter iron and is very rusty in places. The reservoir is probably 30m higher than our house, so the pressure could be considerable.I want to cap this pipe upstream of our house where it runs through some woodland, but I'm sure I won't find a standard fitting to do the job, so it needs some improvisation.
I've dug a hole around the pipe and I'm thinking that I could hammer the pipe flat to try to stem the flow, then cut it slightly downstream and try to bung the end with something (cement / silicone sealant / plumbers' putty), but I'm worried that if the flat section of pipe lets water through then there will be a build up of pressure behind the bung which will cause it to fail.
Any suggestions?