Installing a ground floor toilet and I am trying to find out what the maximum distance this can be from the main drains ,its going to be directly connected to drain ,not to a soil stack ,all I can find in the regs is the maximum drop allowed on this setup which is it has to be less than 1.3 m from floor of toilet to invert of drain ,nothing is mentioned about maximum distance .it will be about 9 m from drain with a fall of 1-40 .