Center End Drain - RV waste holding tank, includes a 3" spigot fitting and four level sensors installed. Constructed of tough ABS plastic for long service life. All seams are solvent welded and have a 1.25" mounting flange. Tough ABS plastic Includes 3" spigot fitting Four level sensors pre-installed Solvent-welded seams Designed for quick and simple installation MODEL NO - 12425