The Brew Cabin

I've got a disused (I think) soil pipe that is not connected to anything apart from the drainage system below ground. At the other side of the house is a soil pipe connected to one toilet that is open to the outside at the top. Can I cut the old cast iron pipe and cap it without causing a problem to the system. What should I look out for to see that the pipe is not needed. Eventually I will remove the pipe completely when the drive is done.

cheers

I assume the CI pipe you're proposing to sever is the old disused pipe? If so, and if it is unused, then yes; you can cut and cap it. However, if it is acting as a vent for the FW system or downstream connections, then you'll either have to leave it in place or provide an alternative vent. The only way to check whether it's 'live' is to excavate and follow it to where it connects to the rest of the system.

Thanks for getting back Tony, I'm pretty sure it does go straight into the system, but it's 15 ft high and does not have any pipework coming out of the house above surface, I've sealed the top with plastic to see if by doing this a problem will occur up the way and so far nothing. Does this shed any more light on it?.

It's not just the above ground connections you need to consider; if there are any connections below ground, they may be using the soil pipe as a vent, and, if you remove the stack, you may need to provide an alternative air admittance balancing vent. Do you think the whole line is dead?