Drain pipes for garage rainwater

[robgraham]

The garage is having a makeover, including getting guttering. What pipe do I use for the underground run to the outlet for the septic tank ?

Thanks

Rob

[The Natural Philosopher]

You don't run rain water to a septic tank. I hope you meant that you are running the pipe to where the outlet of the tank itself goes..

It should go to a soakaway..or of you are really lucky and the health and safety lot haven't seen it, into a ditch.

4" standard pipe is adequate.

[Nigel Molesworth]

[Mr Fixit]

why do you need to run the garage rain water to your septic tank rain water goes to a soak away ?

[robgraham]

I did realise that all of you would read this as my running the drain into the septic tank - I did try to make it clear I was going to the

**OUTLET** from the tank as I'm not that daft. Rant over.

The septic tank runs into a local stream - yes I know that is not approved of now but it's 80 years old and no-one has bothered me about it. A soak away means a lot of digging and it seems much more sensible to run into the local burn - are there rules against this ? Regardless of that, if I do a soak away what piping do I use - seems a bit unnecessary to use 4" drain pipes.

Rob

[John Rumm]

It does not take much moss etc to block a smaller pipe. I would have thought it much simpler to be able to fit and forget rather than have to keep clearing it etc.

[Nigel Molesworth]

Shame your English wasn't better then.

Either use 4" pipe, or 3" flexible. If the run is less than a metre, you could get away with down pipe.

[Chris Bacon]

He said: "The garage is having a makeover, including getting guttering. What pipe do I use for the underground run to the outlet for the septic tank?"

Not too difficult to understand.

[robgraham]

Thanks Chris !

Rob

[Nigel Molesworth]

Totally ambiguous. He meant to say: What pipe do I use ... to the outlet OF the septic tank

Whereas what he said implies: What pipe do I use ... to the outlet for the septic tank INPUT

Hence all the confusion.