Waterproofing underground pits
Waterproofing underground pits
(OP)
Aside from specifying a water sealant, what are other ways of waterproofing pipes that penetrate an underground sump pit? Would flanges on either side of the pipes be the answer? Also, with an underground concrete vault, should additional drainage pipes or pressurized slab be specified to prevent water from infiltrating from the sides and below?





RE: Waterproofing underground pits
http://www.press-seal.com/Product/CAST-A-SEAL%2080...
For pipes, you can use water stop rings:
https://www.google.com/search?q=water+stop+on+pipe...
If you have an existing pit, grouting would work. Try Avanti Grout:
https://www.avantigrout.com/images/stories/product...
RE: Waterproofing underground pits
another option that I have used
RE: Waterproofing underground pits
One way is to insert sleeves with puddle flanges or flanges at the end which you can seal with sealant. The pipe you seal with something like link seal http://www.gptindustries.com/products/link-seal-mo...
As with all things you generally get what you pay for. Any location which has a permanent or quite high water table on the outside needs some really good seals otherwise failure after a couple of years is common as is failure of the pipe if / when settlement of either part occurs.
My motto: Learn something new every day
Also: There's usually a good reason why everyone does it that way
RE: Waterproofing underground pits
http://www.gptindustries.com/products/link-seal-mo...
I have also seen them install a "Concrete Collar" as an addition on the outside of manholes, this is typically just a block on concrete dropped all around the connection.
If your worried about joints leaking you could also use "Blue Skin" this is a waterproof membrane installed around manhole joint to prevent water infiltration over time.