Bunging open vented system

[Tommo25]

question for you veterans, what are your tips and tricks for when you don't get a good vacuum when you bung the tank. (Sometimes its not a round hole, sometimes hexagonal or got little tabs on it preventing a good seal).

I've cut an isolation valve in on the outlet in the past, however sometimes there isn't room for this.

I've heard of something about using a plastic bag?

Thanks

 

[Ben-gee]

22 push fit stop end on vent, rubber bung in outlet - odd shapes use a carrot.

 

[king of pipes]

Had some success with these we as plumbers have to improvise from time to time a short length of over flow wedged against it and the inside tank of the tank worked for me . Kop

 

[Tommo25]

22 push fit stop end on vent, rubber bung in outlet - odd shapes use a carrot.

I've not heard of using a carrot, may be worth a try, I'm guessing the carrot will swell slightly to create a better seal

 

[Ben-gee]

I think it’s more than if you have lugs on the outlet they will cut slots into the carrot, and the general wedge shape works like the bungs .