Quality materials and superior construction differentiates the Rhino over other Spindrifter type drains. A few of the problems associated with the Spindrifter have been alleviated in the Rhino design including:
Thicker flanges and liner attachment ring that will not flex or crack
All attachments are machine fitted for extra strength with no need for gap filling
All joints are hand welded resulting in more strength than the speed welds used on the Spindrifter
3" height over the horizontal discharge port for more concrete over the horizontal discharge port (the Spindrifter requires a collar to increase the height over the drain)
Direct pipe connection into the air bladder (the Spindrifter requires you to snake an air line through the pipe)
Rhino air drains contain an air check valve to prevent water entering the air line
Rhino drains are American made and cost less than the Spindrifter!
Rhino Series I drains are vertical discharge in your choice of 3" or 4" pipe. The Rhino II air drain is 4" ported, horizontal discharge.