Grate Extender for Deck Drains Thread Size:3.5" Threads Simple Retrofit Design: The insert

Simple Retrofit Design: The insert design slides easily into your existing drain pipe for a hassle-free installation

and efficient water removal for your parapet wall

Heavy-Duty 16 oz

and 6" drain sizes to accommodate various commercial roof drain requirements and drainage system specifications across different building types and roof areas

Seamless Basin

Grate Extender for Deck Drains Thread Size:3.5" Threads Simple Retrofit Design: The insertExtends 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.