Connecting to a Rising main

[wunderjah]

Have been approached regarding connecting a 2nd pipeline into a proposed foul Sewer Main. - I can only see this occuring by several ways:
1. connecting the extra pipes under pressure using another pump station.
2. finishing the first pumped section into a wet well then using a 2nd pump station to pump all flows plus new flows onwards.

Is there any way of having a connecting section of pipe to the main rising main trunk without having to build another pump station?? Can anyone shed some more light on this subject??

Thanks

 

[dicksewerrat]

If the first pipe is under pressure, the second must also be under pressure. the second must have more pressure to force more q into first pipe. this may give you back flow. Use the second pump station idea.

Richard A. Cornelius, P.E.

http://WWW.amlinereast.com

 

[wunderjah]

Unfortunetly, we are looking at connecting the 2nd pipe using the initial method, you mentioned back flow, is there a way of avioding this (design or pipe angles etc?)
Thanks for your Help..
we are using HPPE pipe at SDR 17.