Most of our sinks, baths, washing machines etc drain into the old rainwater system which drains we know not where.

We've been told under the new regulations they must all drain into the victorian septic tank before January 2020 or we risk fines and jail.

https://www.gov.uk/guidance/general-...-surface-water

But there's a risk of foul gases coming into the house through all these new connections.

Could we have extra U Bends at ground level near the new connections?

Or how can it best be done?

george