Grate Extender for Deck Drains Thread Size:3.5" Threads Heavy Duty ABS Cyclolac Dome

Heavy Duty ABS Cyclolac Dome Strainer: The included heavy-duty ABS Cyclolac dome strainer effectively filters out leaves

Seamless Basin

and musty odors with strategically placed copper foundation vents

Available with optional brass elbow

and efficient water removal for your parapet wall

Grate Extender for Deck Drains Thread Size:3.5" Threads Heavy Duty ABS Cyclolac DomeExtends thread pattern grates an additonal 2". These grate extenders can be threaded into each other to reach any desired height. Two sizes to choose from 2" thread pattern for our: 4" & 5" Round Grates, and 5"x5" grates 3. 5" thread patter for our: 6" Round, and 6"x6" grates.