Bespoke Inspection Chamber?

[dnoble]

I have a long (55m) run from house to mains sewer in road 

We laid 110mm pipes with appropriate drops (for  foul and surface/roof water) next to each other in trench. 

Building inspector checked and said fine. 

Called next day and said " by the way you need an inspection chamber every 22m" (therefore 2 and need to include both pipes).

This is going to be very fiddly to retrofit (builder hadn't done a run this far before and didn't know of this rule)

Also inspection chambers all seem to have radial pipe entrance. 
I need one 300-500mm accross with 2 parallel pipes in the bottom. 

I cant find such a thing online. 

Is the only option building one out of blocks or something??

 

[Jeremy Harris]

A quick search seems to throw up several with opposing inlet/outlets:

 

https://www.plasticdrainage.co.uk/cs320-inspection-manhole-chamber-set.html

 

https://www.drainagepipe.co.uk/products/complete-inspection-chamber-sets/300mm-mini-inspection-chamber-complete-set-unique/300mm-mini-inspection-chamber-complete-set/

 

maybe two of the smaller ones can be set side,by side, offset down the run by a metre?

[Jeremy Harris]

Just seen this, the image on the top left on the Polypipe website:https://www.polypipe.com/inspection-chambers

 

Might be able to get two of those almost side by side.

[Mr Punter]

I understood that it was 45m between inspection chambers. I also think you could just put a rodding eye for the foul and not bother with the surface water. Ask Marley or Polypipe technical for backup if required. Easier to send them a drawing than mess with digging up drains.

[dnoble]

Hi Jeremy, thanks. That last one looks like a possibility if they are building regs passable. Yes otherwise the offset option squeezed in might work, though you'd have to chop a bit out to accommodate the uninspected pipe

[Jamie998]

23 minutes ago, Mr Punter said:

I understood that it was 45m between inspection chambers. I also think you could just put a rodding eye for the foul and not bother with the surface water. Ask Marley or Polypipe technical for backup if required. Easier to send them a drawing than mess with digging up drains.

I agree - I am pretty sure 45m from IC to IC.  Table 13 of Part H.

[dnoble]

Th ebuilding insepctor was pretty clear you needed one for any run over 22m. 

Could you provide a link? I've just looked at table 13 part H it isn't very obvious what applies to me. It mentions 22 and 45m 

 

https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/442889/BR_PDF_AD_H_2015.pdf

[LA3222]

1 hour ago, dnoble said:

Th ebuilding insepctor was pretty clear you needed one for any run over 22m. 

Could you provide a link? I've just looked at table 13 part H it isn't very obvious what applies to me. It mentions 22 and 45m 

 

https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/442889/BR_PDF_AD_H_2015.pdf

On the left hand side of that table you have a list of various access points....along the top you have the lost of 'to' access points.

 

So....inspection chamber shallow 'to' inspection chamber is 45m.

 

Not trying to be patronising...thats how I read the table.  Maybe others read it differently?

 

I'm not sure how IC to IC is ever 22m?