The Reliance Portable Toilet Model 4822 has a 3 gal/12L fresh water tank and 6 gal/23L holding tank with a comfortable seat height (standard toilet seat height of 17) with larger and deeper toilet bowl for added comfort. It has an innovative T slot flush nozzle directs water around whole bowl to ensure efficient draining of waste, a high end injection piston pump provides even greater flushing efficiency (and is replaceable). Waste holding includes an exhaust valve and waste level indicator. Waste holding tank also features a swivel emptying spout for easier emptying and clean-out. The toilet can be affixed to a flat surface using the x-shape base bracket (sold separately). It has a 325 lbs weight capacity, dimensions: 16.5 x 16 x 17 and 13 lbs. Model 4822e as optional single push electric flushing nozzle. Uses 8 AA batteries.