Storm water drainage regs

[booner]

Hi, i have to run all drainage in on a very large newbuild, the front of the house has 8, yes 8 downpipes due to the roof layout, my question is does each and every trapped hopper for storm only have to feed into its own manhole or can i use "y"s on the run, and not have 8 covers showing along with the foul ones as well!!just trying to save the man a few quid but obviously itll have to pass building control when he visits! Thanks

 

[booner]

Also, been a while since i did this stuff in an official capacity, are rockers outside manholes still mandatory or where they more for clay pipe??

 

[denso13]

my question is does each and every trapped hopper for storm only have to feed into its own manhole

No, but check with BC first. They may have a different view.

 

[Nige F]

Do they even need a trapped hopper (gulley) ? surely goes to a soakaway.

 

[noseall]

Hi, i have to run all drainage in on a very large newbuild, the front of the house has 8, yes 8 downpipes due to the roof layout, my question is does each and every trapped hopper for storm only have to feed into its own manhole or can i use "y"s on the run, and not have 8 covers showing along with the foul ones as well!!just trying to save the man a few quid but obviously itll have to pass building control when he visits! Thanks

Y or T junctions OK on rainwater...

Water3

• noseall
• 10 Nov 2019

Congon1

• noseall
• 19 Jul 2018

...and you can rod from the bottle gullies.

 

[booner]

Do they even need a trapped hopper (gulley) ? surely goes to a soakaway.

Not for smells but isnt it advisable for trapping dirt off the roof, over time there will be a build up‍

 

[noseall]

Do they even need a trapped hopper (gulley) ? surely goes to a soakaway.

We always fit them, otherwise all the roof crud and silt, shortens the life of the soak-away.