Inspection port

[Tim22]

Hi all
I would like to install a small inspection port in my holding tank but am concerned about the best method to prevent it from leaking when closed. The tank is polyethylene.

thanks for any suggestions

Tim

 

[Capt jgw]

I wouldn't do it. Nothing sticks to polyethylene so you'll have a hard time sealing it. And when the vent clogs you'll be putting pressure in the tank. The consequences are too icky to think about.

 

[Peggie Hall HeadMistress]

It can be done and it's actually easy to do...Beckson makes retrofit kits to add inspection ports to PE tanks. No "glue"...use a hole saw to create the right size hole...the flange is secured using screws. A rubber gasket creates the seal. A rubber o-ring on the cap seals it. All of this is included in the kit. O-ring should be replaced every few years.

Google "Beckson holding tank inspection ports"...you'll find 'em at retailers all over the place, even Amazon. SeaLand has them under their own brand name, but for a lot higher price than you can find as Beckson's own brand name.

Why would adding an inspection port make any difference if the vent should clog (which won't happen if you maintain the vent)?

 

[Tim22]

Peggy
Thanks for the Beckson tip. I picked one up today and will install it over the weekend.

Tim