Would that not make the pipe 4.75inch? Im just measuring across. The clay soil has been there 35years so i thought it might of been an imperial measurement or something?
Thanks for the reply.
Hi,
Im adding an extension to my existing property and am trying to do as much of the work myself as possible.
I need to add a new soil pipe to the rear. Im wanting to tap this into the existing clay soil. The existing pipe is 5.5inch though and i can only get pipework and attachments to...