Dranjer F-R2 Retrofit Floor Drain

Description

Dranjer sump cover and floor drains provide a one valve for water to pass through. This will inhibit foul odors from rising out of the sump or floor drain. If a radon mitigation system is installed these Dranjers will stop air from drawing down through the sump cover. This is important to increase the radon system's pressure under the floor and to stop treated air from the house being drawn out which can greatly increase energy consumption.
The “F-Series” Dranjer™ products are designed to be used in homes where sub-slab ventilation has been included as a radon mitigation technique.  These valves will not open at less than 1.25” of negative pressure yet allow for water flow.
F-R2 is a retrofit model designed for floor drains.
A flexible rubber flange attaches to the hard plastic portion of the seal.  Hold the Dranjer under the
existing
strainer plate.  Push the strainer plate with the Dranjer back into the drain opening.  Friction among the sides of the strainer plate, the Dranjer, and the ring in the floor holds the Dranjer under the cover plate. Trim off the rubber that extends past the ring.  You have retrofitted the Dranjer in existing construction.
Fits drain pipes 2” or larger.