Sealing sanitary manholes from the inside
Sealing sanitary manholes from the inside
(OP)
Can anyone tell me how to effectively seal a sanitary manhole from the inside? I have about 8 MHs full of water.
I'm pretty sure ground water is infiltrating through the barrel joints and or pipe connection in several of these new manholes. The contractor tells me He used rubber gaskets around all the barrel joints. So unless they twisted during installation, Im not really sure what is going on. The manholes are still under warranty but I'd hate to have him dig them all up.
Putting concrete around the inside of the barrel will almost certainly fail due to the direction of ground water forces.
Important to seal because it is a forcemain system and the manholes house the valves and air-relief componants.
I'm pretty sure ground water is infiltrating through the barrel joints and or pipe connection in several of these new manholes. The contractor tells me He used rubber gaskets around all the barrel joints. So unless they twisted during installation, Im not really sure what is going on. The manholes are still under warranty but I'd hate to have him dig them all up.
Putting concrete around the inside of the barrel will almost certainly fail due to the direction of ground water forces.
Important to seal because it is a forcemain system and the manholes house the valves and air-relief componants.





RE: Sealing sanitary manholes from the inside
Richard A. Cornelius, P.E.
WWW.amlinereast.com
RE: Sealing sanitary manholes from the inside
RE: Sealing sanitary manholes from the inside
Checkout there website..
RE: Sealing sanitary manholes from the inside
RE: Sealing sanitary manholes from the inside
If it is in warrantee, and you spec the solution and it fails, you've probably just taken over responsibility. Check with your lawyer, but I think I am correct.
If you just tell the installer they don't meet spec - you certainly have a hydro. test spec'ed, and that test certainly requires watertightness to be demonstrated - the installer must try things until they do.
Remember: The Chinese ideogram for “crisis” is comprised of the characters for “danger” and “opportunity.”
-Steve
RE: Sealing sanitary manholes from the inside