All Wall Drain No-Flush™ Urinal Models Install Like Flushed Urinals To The To The Standard 2†(52mm) Drain Line Via A Gasket And Flange. No Adaptors Needed! All Wall Drain Units Have A Closed Urinal Bottom To Avoid Vandalism. No Need To Buy Separate Costly Bottom Covers. All Of Our Urinals Have A Full 2†(52mm) Interior Drain Line. This Allows Easy Line Cleaning And Access If Needed. Urinal Does Not Need To Be Removed From Wall For Snaking. Saves Time! No Gaskets Or O-Rings Needed On EcoTrap Inserts. Simple Pressfit! The EcoTrap Unit Removes Completely For Servicing And Change-Out. No Taking Traps Apart For Cleaning And To Reassemble!