As a qualified spark, I really struggle in the plumbing department. It's why you're on more money than us ;)
The drainage in our rear garden is pretty dire. The lawn is regularly saturated in water, so when the weather picks up I'm going to spend a couple of days putting in a french drain or something similar. The problem is, the only viable place to get rid of the excess water is by integrating the new drainage into the soil pipe that runs down the rear wall of the property from the 1st floor bathroom. Not ideal, but practically there is nowhere else to channel the water.
I was thinking of fitting a 110mm boss clamp to "T" off the soil pipe, but I have a size issue. My drainage pipe is going to be either 60, 80 or 100mm wide. Am I right in saying that if I use a boss clamp I'm limited to about 40mm? How would I best overcome the issue of different pipe sizes?
I've looked at various adapters but I cant find any that would be an appropriate size. Help!
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