OATEY 271675 Cherne® 2in. Monitor Well™ Locking Plug

Yes. The Cherne Monitor Well locking plug in the 2 inch (50 mm) nominal size is sized to seal Sch. 40 piping, and the 2 inch and 4 in. sizes will also seal schedule 5 plastic pipe. It seats inside the casing rather than threading on, so you need the inside diameter of the well casing to match the nominal size.

It is rated to 6.5 psi (0,45 bar), which is equivalent to a 15 ft. (4.5 M) head of water. That is a monitoring well seal rating, not a test plug rating for pressure testing a line, so don't use it where you need to pump a system up.

Yes, Oatey states the Cherne Monitor Well locking plug meets all EPA requirements for locking plugs. That is what makes it the usual choice for underground storage tank observation and monitoring wells at fuel sites.

The yellow chromate-coated locking latch accepts Cherne's solid brass padlock or a No. 2 Master padlock. The padlock is a separate purchase, so add one to the order if the well needs to be secured.

That is what it is built for. The top and bottom plates are chemical- and petroleum-resistant Estaloc plastic, the seal is a petroleum resistant nitrile o-ring, and the carriage bolt is stainless steel. Standard rubber mechanical test plugs with an ordinary gasket will swell and fail in that service.

No. A mechanical test plug is a temporary device for pressure testing or blocking a line during construction. The Cherne Monitor Well locking plug is a permanent, lockable well seal: it keeps water, debris and tampering out of a 2 in. monitoring or observation well, holds back 6.5 psi (0,45 bar) of head, and takes a padlock. If you're testing a DWV system, you want a standard mechanical test plug instead.

Order Oatey part 271675. It is the 2 in. (50 mm) Cherne Monitor Well locking plug, finished green, which is the color convention crews use to spot a monitoring well cap in the field.