The compact design of the GB1 makes it a perfect fit for under-the-sink installations. It can be installed above grade (on the floor) or buried below grade (compatible with FCR1 riser to bring system to grade). The triple outlet feature allows for installation flexibility, including the ability to connect an unused outlet for remote pumpout (PP1 compatibility). More Features: Rugged polyethylene tank body Built-in Flow Control Cartridge™, easy to remove for cleaning (Learn More) Includes plain end fittings to connect to 2" and 3" pipe Listed by IAPMO to ASME A112.14.3 and CSA B481.1.