Vacuum Sewer System in HDPE 2

[Engineerd]

I asked this same question a few months ago, but didn't get any responses. I am designing a vacuum sewer system out of 6" HDPE SDR 11 pipe. The service lines from individual homes are 2" HDPE SDR 11. AirVac recommends connecting the service line to the main with a 6"x6"x2" HDPE 45deg. wye. In the future, as more houses connect to the system we will have to connect new services. I would like to do this without having to shut down the system and cut into the main to install the 6x6x2 wye. Does anyone know of a 2" 45deg. electrofusion saddle or a repair clamp/sleeve with a 2" 45deg. nipple? Other suggestions would be appreciated.

 

[BigInch]

I don't. I think a cut-in on 45º is a bit problematic.

BigInch-born in the trenches.

http://virtualpipeline.spaces.msn.com

 

[MikeHalloran]

You already know where the houses are, or will be. Put the wyes in now, and plug the branches.



Mike Halloran
Pembroke Pines, FL, USA

 

[rconner]

wow, I guess due to me not being familiar with same 2" sounds like some very small sewer pipe, particularly if this is unsetttled sewage (if you have not already done so, you might want to confirm jurisdictional requirements)

 

[redbridge]

I would cut the line and add wyes as services are added. You would just have to shut the main vacuum station down for a few minutes to make make the tie-in. I am curious as to why you are using a vacuum sewer system?

 

[Engineerd]

This is an above ground aluminum utilidor system in a small village in Alaska. The soils are too poor to do gravity or buried sewer lines. Our best option right now is to fabricate a 6"x2" HDPE 45 deg wye with a flange adapter on the 2" branch. We are going to install these fittings at each lot with a blind flange on the services that aren't going to be connected right away. When future services are needed (new homes) we will just cut into the main and install the same fitting with EF couplings. Thanks for your responses.

 

[civilperson]

How do you protect against freezing?