Replacing mechanical flapgate valves with the fabric-and-elastomer CheckMate eliminates a lot of maintenance related to corrosion-induced failure. To install, insert the valve into the pipe, then clamp into position from the upstream or downstream end. All-rubber unibody design prevents offending odors from backing up while letting water discharge as needed. Available in 4- to 72-in. sizes.

Red Valve Co./Tideflex Technologies