Rhino I 4" Bottom Drain No AirThe Rhino II brings commercial quality to your pond at an economical price. All Rhino drains are made from Schedule 80 PVC and designed by computer generated machine fabrication and are thermal welded by hand to assure top quality dependable welds. All Rhino drains can be installed with extreme confidence in any application by beginners and experts alike. A bottom drain can be said to be one of the most important parts of a pond installation. Not