I've always been led to believe that surface water should never be drained to a septic tank on the grounds that it flushes the tank through too fast - is that wrong or has the policy on this changed in recent years ?
We're all on septic tanks where I live and I'm surprised to see that the drains for an extension my neighbours are having built are all being run into the same pipe. I'm particularly interested as I'm going to have to re-do some of my down pipes shortly and running them into the drain from the bathroom would be much easier than re-establishing a soak-away.
Rob