Sanitary service connection to carrier pipe inside a steel casing pipe
Sanitary service connection to carrier pipe inside a steel casing pipe
(OP)
We're in the design phase of a sanitary sewer upsizing/replacement project. The new sanitary sewer will be 36" and 30" diameter PVC. Steel casings (bored and jacked) are planned along several runs to help minimize disruptions/impacts to local businesses.
Two existing sanitary services need to be reconnected to the proposed upsized sewer. These services are located along the proposed steel casings pipes.
Question: Is there a clean way to re-connect an existing sanitary service lateral to a 36"/30" PVC carrier ppe inside a 54"/48" steel casing? Casing spacers will be used, so the voids between the casings and carrier pipes will not be filled with pea gravel or grout. More specifically, is there a way the service re-connections can be made that will ensure watertight connections at the sanitary service riser / steel casing wall interface? For service connections to large diameter mains, we generlally specify an Inserta Tee fitting.
I'd be very grateful for insights anyone could offer.
Thanks.
Two existing sanitary services need to be reconnected to the proposed upsized sewer. These services are located along the proposed steel casings pipes.
Question: Is there a clean way to re-connect an existing sanitary service lateral to a 36"/30" PVC carrier ppe inside a 54"/48" steel casing? Casing spacers will be used, so the voids between the casings and carrier pipes will not be filled with pea gravel or grout. More specifically, is there a way the service re-connections can be made that will ensure watertight connections at the sanitary service riser / steel casing wall interface? For service connections to large diameter mains, we generlally specify an Inserta Tee fitting.
I'd be very grateful for insights anyone could offer.
Thanks.





RE: Sanitary service connection to carrier pipe inside a steel casing pipe
Is there a reason that boring and jacking casing pipe is being used instead of pipe bursting?
RE: Sanitary service connection to carrier pipe inside a steel casing pipe
After thinking things over a little more...maybe the casing could be cored - large enough to install an inserta tee and then a flexible saddle tee installed on the on the casing....