www.phcppros.com/articles/7940-josam-adjustable-roof-drains
Josam Adjustable Roof Drains
August 1, 2018
Roof drains with four different methods for height adjustment include a fixed extension, threaded adjustment with sealant, adjustable extension rods and threaded O-Ring adjustment. The LEVELEZE threaded adjustable extension offers an adjustable height at 4 ΒΌ-inches on the O-Ring adjustable roof drain. Multiple options are available for an unlimited top-level adjustment to accommodate various insulation thicknesses.
Josam