Large views of the hinge detail inside
of a 4963 Mainline Backwater Valve

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4963 gate hinge socket

Hinges Sockets on the bottom of the 4963 valve body on the inlet side of the valve. The opening is slightly narrower than the hinge pin portion of the yellow gate so the pin must be carefully pressed in to spread the socket without breaking the pin.

gate hinge socket detail

Detail view of Hinge Socket.

gate hinge improperly seated

Yellow Hinge Pin of Gate not yet seated into the Hinge Socket.

4963 gate hinge pins properly seated in hinge

Yellow Hinge Pin of Gate properly seated into the Hinge Socket.

insert gate

Crude Diagram showing how to properly seat Hinge into Socket.