Grate Extender for Deck Drains Thread Size:3.5" Threads These hammered copper stamping circles

These hammered copper stamping circles are absolutely gorgeous

and musty odors with strategically placed copper foundation vents

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

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

Grate Extender for Deck Drains Thread Size:3.5" Threads These hammered copper stamping circlesExtends 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.