One-piece spun Aluminum body with Heavy-Duty dome strainer & clamping ring for years of long-lasting durability.  Featuring the USMS DS (Double Seal) No leak mechanical Water-Tite seal (Patent pending)!  Currently Standard Retrofit Roof Drain is designed to mechanically expand both the Upper Seal to tighten firmly to the drain’s stem and the Lower Seal to the inside of the actual drainpipe in which it is inserted, simply by turning 4 screws perpendicular from one another, each an equal number of turns so that it seals evenly to both the drain itself and the actual drainpipe.

Material:  Aluminum

Drain Body: 11 Gauge (.125) spun aluminum

Flange:  17.5″ diameter with sump area

Clamping Ring:  Cast aluminum

Dome Strainer:  Cast aluminum

Stem:  12″ length

Available in 3″, 4″, 5″, & 6″ sizes

USMS DS Water-Tite Seal (Patent pending) with adjustment tool included in package.

2″ & 8″ sizes also available with double-O-ring seals.