Sealing cistern overflow pipe
#1
07-30-21, 12:23 PM
Join Date: Jul 2021
Posts: 3
Upvotes: 0
Received 0 Upvotes
on
0 Posts
Sealing cistern overflow pipe
I have a seeping leak between the concrete cistern wall and the Schedule 40 plastic overflow pipe when the cistern is 100% full, and want to confirm that white 3M5200FC will be a suitable material to fix it with. I plan to chisel a small V-groove on the outside and fill it with adhesive when the water is well below the bottom of the pipe and the joint is dry.
#2
07-30-21, 01:09 PM
Group Moderator
Welcome to the forums.
I don't how well that will stick to concrete..... 3M sealant
I would think you could use hydraulic cement too.
I don't how well that will stick to concrete..... 3M sealant
I would think you could use hydraulic cement too.
#3
07-30-21, 01:13 PM
Group Moderator
Is there any way you can get inside the cistern to try and seal so the water pressure helps to hold the sealant in place?
#4
07-30-21, 03:46 PM
Join Date: Jul 2021
Posts: 3
Upvotes: 0
Received 0 Upvotes
on
0 Posts
Afraid not able to access inside the cistern. And not sure I want to chip out a large enough square-sided channel for hydraulic cement to work properly. (V-groove NG for hydraulic cement.) May test adhesion on a non-critical concrete surface, though.
Mostly worried about water contamination but probably small worry since it's almost a foot away from the water in the cistern.
Mostly worried about water contamination but probably small worry since it's almost a foot away from the water in the cistern.
#6
07-30-21, 05:05 PM
Group Moderator
Mostly worried about water contamination
If it's only extra potable water..... so what.... let it leak out.
#7
07-31-21, 05:04 AM
Join Date: Jul 2021
Posts: 3
Upvotes: 0
Received 0 Upvotes
on
0 Posts
Contamination would be from diffusion from the adhesive into the drinking water. The problem I want to solve is that mold/mildew grows on the wet surface of the wall where the water drips out. Unsightly.
