Utility room drainage

[JPM]

I am converting my garage to a utilty room and i need advice on drainage. A washing machine and sink will drain via a 40mm pipe through the outside wall at 50mm above ground level. The nearest drain is the access chamber which is 90 degrees from the wall opening at a distance of 8 metres. Is it possible to use a 40mm pipe from the wall opening to the access chamber at the correct fall and cement the pipe into the access chamber wall. If so what would i need to lay the pipe on and cover it with? (decking will be built over the area in question). If this is not possible what is the easiest way (and cheapest) to drain the room?

[Tony McC]

Install a hopper and trap on the outside wall, at 150mm below dpc, and pipe up to the AC in the usual way - underground. Arsing about with 40mm pipes "cemented" into the AC will compromise your home's compliance with Building regs, which could be a sticking point if you ever come to sell the property.