Bedding thickness for foul drainage pipe: how thick?

[ToughButterCup]

My recent re-aquaintace with the mark 1 shovel, MOT1, and Glacial Till has made me much more cautious about how deep to dig my foul drain trench.

Its not a matter of popping down to fetch red diesel any more .....

 

I have found these two YT videos very helpful

Osma's guidance  (at 4:05)

and this

gentle bit of mickey taking ...

 

How much shingle needs to be put under the drainage pipe? The guy from Osma says 100mm; is he right? I can't find any guidance that says it must be 100mm.

[Vijay]

This says 100mm too https://www.pavingexpert.com/drain02

[Russell griffiths]

I’m putting normal diesel in the digger, breaking my heart and bank account 

£60 this week already 

 

100mm by the way. 

[Oz07]

4 minutes ago, Russell griffiths said:

I’m putting normal diesel in the digger, breaking my heart and bank account 

£60 this week already 

 

100mm by the way. 

What size you using? I got a solid 3 days graft out of a little e10 for less than 20 quid in white

[Russell griffiths]

9 minutes ago, Oz07 said:

What size you using? I got a solid 3 days graft out of a little e10 for less than 20 quid in white

This is for dumper and digger, digger probably only uses 10 litres a day, but I’ve been sat on it for the last fortnight and will be for the next couple of weeks. 

[dnb]

41 minutes ago, Russell griffiths said:

I’m putting normal diesel in the digger, breaking my heart and bank account 

 

Me too. But the red here was close to £1/litre unless you could find space for a 500 litre tank before the virus kicked off, so not much difference.

 

I am doing 100mm for the drains as in diagram 10 part b in Approved Document H

 

 

[JFDIY]

You need to befriend your local farmers, bet they'll sell you a few gallons. 

[joe90]

32 minutes ago, JFDIY said:

You need to befriend your local farmers, bet they'll sell you a few gallons. 

yup, my friendly farmer sold me 50 litres at 55p per litre, (I did round it up a few quid as the local garage that normally sold red charges 80p per litre). 

[Russell griffiths]

1 hour ago, JFDIY said:

You need to befriend your local farmers, bet they'll sell you a few gallons. 

I can get it, I’m just trying to avoid people 

i can go to Tesco and pay at the pump. 

 

Poor ol @AnonymousBosch sidetracked his topic, sorry mate. 

[ToughButterCup]

21 minutes ago, Russell griffiths said:

[...]

Poor ol @AnonymousBosch sidetracked his topic, sorry mate. 

 

Its me that's the Plonka.

I really shouldn't be asking questions where the answer is in plain sight.

As penance.... here's  H1 Page 17 

 

and I attach the relevant Approved Document (H1)

 

H_FoulWater.pdf

[Temp]

The gravel also makes it easier to level the bottom of the trench. I think it would be hard to keep the bottom of the trench flat enough to allow much less than 100mm.

[Miek]

Worth considering the pipe bedding material. Where I live pea shingle (6mm) is £25/t but graded limestone 'pipe bedding' which is basically 6-10mm clean is only 18/t. Better check with your building inspector but mine was happy with either. I'm laying around 100m of it so it does make a difference. 

[Oz07]

Even better recycled crushed concrete 10mm clean where I am 10 quid a tonne

[Miek]

On 13/04/2020 at 08:43, Oz07 said:

Even better recycled crushed concrete 10mm clean where I am 10 quid a tonne

Delivered? That's Cheap

!

[Oz07]

Collected loose