Originally Posted by Avns1s
Only rainwater should run into the soakaway. Grease and Detergent from sinks, washing machine, etc., line the sides of the soakaway with a film / crust that water cannot penetrate, hence the backing up.
You'll have to replumb those drains, i'm afraid.
Thought that might be the case alright. It probably also means that I've already started to clog up my soak pit and may have to go digging there too as I've no way to clean out that. Ba**s of a job!
On the brighter side, changing my washing machine shouldn't be too bad. There's a foul water stack outside a different wall in the utility that I should be able to tap into. Hopefully just a matter of a 40mm core bit and a couple of fittings. Bathroom sink is another matter...
On a slightly similar train of thought, if I were to put in a sink in my utility with a waste disposal unit for food scraps etc., can I run this straight into my foul water line? Any known problems with these?