Max Length for toilet and bathroom waste pipes?

[chelseablue1979]

Please help. We are currently looking at a project to convert our existing bathroom into a bedroom, with a new bathroom being created on the opposite side of the property.

We have significant issues with installing a new soil stack and considering running bath/toilet/ sink waste pipe on the outside wall of the property down to the existing soil stack as this will enable us to achieve the required fall for a soil waste pipe with a total length of approx 7m. Looking at the building regs part H it appears a max length of 6m exists for branch connections, but the document also makes reference to exceeding this distance if the pipe itself is ventilated? I am assuming this is in addition to normal soil stack ventilation?

Does anyone have any experience with a similar situation if so any advice would be gratefully received.

 

[seco services]

extend waste by adding air admittance valves to the pipework.

 

[chelseablue1979]

extend waste by adding air admittance valves to the pipework.

Thanks for the reply. Soryr to be cheeky but do you also know if I will need to involve building control/regs if I am not installing a new soil stack and merely plumbing in to the exisiting stack?

 

[seco services]

yes your changing the room.