Septic tank

WIAWSNB

knittingnanny1102 said:

WIAWSNB said:

As you surmise, how could the presence of the old ST still affect the outflow? Any contents would have been flushed away by now, surely, and it was probably fully emptied when the TP was installed in any case. It is now just a clean water reservoir.

Worst case would appear to be that you'd need to by-pass the ST with a length of pipe! Ok, a bit more involved, but hardly an issue, I'd have thought. 

But, like you, I am only speculating. I, personally, wouldn't be concerned, since if an issue with this setup was ever pointed out, the solution should be cheap and simple.

That fact you have a new TP is a big plus, obvs

Yes the new treatment plant is great.  Not all that easy to stick a new pipe on protected ground.. but I get your point.  I was just worried about if the old tank started to leak or collapsed in on itself or something similar 

In which case, surely a relatively simple task to bypass that tank? The inlet and outlet pipes will be at their correct relative heights, so theoretically only need bridging?
I'm assuming that the old ST served 'your' property, possibly from when it was first built? In which case, I think you can be completely confident that an easement has been gained to allow this to continue - tho' always worth confirming.
If there remains any uncertainty over this 'easement' issue, then I think an indemnity policy from the vendor should be requested. This would surely be a cheap and simple document, but it also means you mustn't explore this issue yourself, and make the owner of the land aware (tho' they presumably already know...)
Yeah, Catch 22. Just ask the vendor for confirmation!
If it leaks or collapses, then it'll need fixing as it would do in any case. The right to discharge via that land is the big issue, but almost certainly you have this.

Section62

WIAWSNB said:

In which case, surely a relatively simple task to bypass that tank? The inlet and outlet pipes will be at their correct relative heights, so theoretically only need bridging?

The problem - if I've understood correctly - is that diging in the area around the septic tank would require special consent and the involvement of an archaeology service (£££££).  If it turns out there is something significant where you want to put the pipe then the pipe won't be going there. Full-stop, no arguments or discussion to be had.

But as I mentioned above, there shouldn't be a need to bypass the tank.  If it is deemed to be a problem then just fill it with concrete up to the pipe invert level and turn it into a simple inspection chamber.  Zero digging required.

BikingBud

Can a pipe not be run across the top of the tank from inflow to outflow, in essence just flowing straight over the tank and the void backfilled with suitable ballast or aggregate.