Drainage over footings

[vik2001]

Can a private drain sewer pipe be run over the footings.  I've already had the concrete laid in a trench. We want to run it over and then do block work, will lintil over it.

 

Can this be done or is it to late because foundations have been laid?

[nod]

Yes 

You would never run a drain underneath your footing 

[vik2001]

So what I meant is private drain above the top of the foundation at floor level.

 

 

[nod]

14 minutes ago, vik2001 said:

So what I meant is private drain above the top of the foundation at floor level.

 

 

Yes

[JohnMo]

50 minutes ago, vik2001 said:

So what I meant is private drain above the top of the foundation at floor level.

 

 

Not sure how else you would do it. Block work and lintel over, pea gravel around pipe...

 

Assume you mean by private drain, you mean waste pipes from your own house and not some other buildings? Another buildings waste would be rerouted around the new foundation not through or under it.

[vik2001]

Yea private as drains only serve my house. I'm bit worried having everything underground for all my services. I have a manhole in front driveway, going to create a access chamber into back of garden. Need to figure out how bathroom and kitchen will all connect up underground to main drain

[JohnMo]

28 minutes ago, vik2001 said:

Yea private as drains only serve my house. I'm bit worried having everything underground for all my services. I have a manhole in front driveway, going to create a access chamber into back of garden. Need to figure out how bathroom and kitchen will all connect up underground to main drain

Why hasn't your architect not already planned this out and structural engineer not done the supporting drawings?

[Temp]

4 hours ago, vik2001 said:

So what I meant is private drain above the top of the foundation at floor level.

 

 

 

So you have fully filled trench foundations and want to run your soil pipes over the top? Above ground? 

 

 

[vik2001]

7 hours ago, JohnMo said:

Why hasn't your architect not already planned this out and structural engineer not done the supporting drawings?

No none of this was done for drainage. 

 

4 hours ago, Temp said:

 

So you have fully filled trench foundations and want to run your soil pipes over the top? Above ground? 

 

 

 

Correct,  got access to main sewer drain and need to run it over the top above ground going over foundations. Need to p shingle and compact hard-core in the area.  Was just seeing if it's to late as foundations have been laid.

[joe90]

What does you’re BC say ?

[vik2001]

9 minutes ago, joe90 said:

What does you’re BC say ?

He's very awkward private bc.

 

Anyone got any ideas how to run it pls,  just want to get a idea before I get a builder to do...

 

[joe90]

1 minute ago, vik2001 said:

just want to get a idea before I get a builder to do...

Any decent builder should be able to advise the best way to do this, difficult from plans as we need elevations as well.

[saveasteading]

2 hours ago, vik2001 said:

Was just seeing if it's to late as foundations have been laid.

It is a standard thing in the building regulations. If nobody is dealing with this for you, your builder doesn't know , and you don't know, then I'm a bit concerned about quality.

[Russell griffiths]

We need a picture 

you say above the foundation, that’s ok, but then you say above ground, that’s not ok. 
 

they can go above the foundation, but below floor level and below dpc level. 

[vik2001]

Yea it's above foundations, but below floor level 

[joe90]

Yet you say….

.

8 hours ago, Temp said:

So you have fully filled trench foundations and want to run your soil pipes over the top? Above ground? 

 

4 hours ago, vik2001 said:

Correct

🤷‍♂️

[joe90]

All this info is available on the internet 

The minimum depth of any drain is 600mm.Once all the underground drains are laid, Building Control will need to see them and may ask for an air test to be carried out. Once the drain installation is approved the trenches can be backfilled, but first more granular fill is required at least up to the top of the pipes.

[Temp]

6 hours ago, vik2001 said:

Correct,  got access to main sewer drain and need to run it over the top above ground going over foundations. Need to p shingle and compact hard-core in the area. 

 

Is there a danger of it freezing if not deep enough?

 

Old houses frequently have cast iron stacks on the outside of the building so it was probably allowed in the past. 

 

One issue Is that stack should have a large radius vertically mounted bend at the bottom. Not sure how you would do that. 

 

How wide are the footings and how many pipes do you need to cross's them? Could you core drill a hole through them? 

[vik2001]

Yes the more I think about it this design may not work with this design and I see it running into problems. Where do I get specialist help from?

[joe90]

3 hours ago, vik2001 said:

Where do I get specialist help from?

As said above your BC will advise on what he will accept but before that draw us a diagram (cross section) showing heights of ground, foundations etc and many here will advise.  Did you not have any drawings showing this?

 

Edited June 1, 2024 by joe90

[joe90]

On 29/05/2024 at 22:22, vik2001 said:

I'm bit worried having everything underground for all my services.

What do you think everyone else does 🤷‍♂️

[vik2001]

No I don't have any drawings this is why I'm in such a mess. The original private drain has had its manhole taken apart and dismantled. Just unsure of how to proceed. 

The previous builder made a right mess of things and left me in a pickle...

[saveasteading]

10 minutes ago, vik2001 said:

No I don't have any drawings

Do a sketch then. It does not have to be skilled or smart. And / or photo.

[vik2001]

Sorry for bad drawing. It's a side extension which butt's up to neighbous fence. I don't have much room to fit a soil stack on side for toilet where bathroom is. I have a flat roof going on to.

Plan was to extend the private drain by 10m to back of garden for a new chamber/manhole for rodding.

 

I try and get some height levels

[vik2001]

On 30/05/2024 at 10:01, joe90 said:

All this info is available on the internet 

The minimum depth of any drain is 600mm.Once all the underground drains are laid, Building Control will need to see them and may ask for an air test to be carried out. Once the drain installation is approved the trenches can be backfilled, but first more granular fill is required at least up to the top of the pipes.

 

From the invert to ground level I got 390mm, and the drain needs to run a 10m distance. I take it this can't be done?