Forgive the naivity of this question but is there such as thing as a
100mm Strap Boss, I've only seen 40mm ones.The reasoning being that I wish to join a 100mm horizontal toilet waste to a 100m vertical drain (coming out of the ground) as low to the ground as possible. The only thing I've seen is a spigot which has the join a couple of inches above the bottom.
Thanks in advance.
Charlie