Thetford 70200 Box Mount System with Grey Water Bypass Its heavy-duty transfer pump macerates waste, sending it long distance - even 20 feet uphill - to a dump; Easy to install and use Permanent connection saves handling and setup time, and keeps you clean Long-lasting 1 inch discharge hose stretches to 21 feet, yet retracts to 7 feet long to save storage space Drip Cap keeps you clean 3 inch x 24 inch inlet, 21 feet retractable discharge hose with sewer nouncezle and cap, Wiring included, Box Mount System