Medium-sized portable toilet for RV, marine, camping, and emergency use. 4.0-gallon fresh water tank, 3.2-gallon waste tank, piston pump flush, cover-lock, level indicator, integrated pour-out spout. 16-1/2" L x 15" W x 13-7/16" H. Previously known as Thetford part number 92814.
The Thetford 50021 is the Porta Potti 345 — the mid-range model in Thetford's world-leading Porta Potti portable toilet lineup. Previously known as Thetford part number 92814, this is the same proven portable toilet under an updated part number. The Porta Potti 345 sits between the compact 145/165 series and the larger 365/465 models, offering a practical balance of tank capacity, flush count, and portability that suits most RV, marine, camping, and emergency applications.
The 4.0-gallon fresh water tank and 3.2-gallon waste tank provide approximately 33 flushes per fill — enough for a weekend camping trip without needing to empty. The piston pump flush delivers a consistent rinse to the bowl, and the sealed valve system keeps odors locked in the holding tank until it's ready to empty. A built-in level indicator shows when the waste tank is approaching capacity, the integrated pour-out spout makes emptying cleaner and more controlled, and the cover-lock keeps the unit sealed during transport.
• 1x Thetford Porta Potti 345 portable toilet • Seat and cover assembly Recommended accessories (sold separately): • Thetford Aqua Kem toilet chemicals (fresh water tank + waste tank) • Thetford Aqua Rinse Plus (odor and flush treatment)
1. Close the slide valve between the upper and lower tank 2. Separate the lower waste tank from the upper unit by pressing the release button and twisting apart 3. Carry the lower tank to a dump station, toilet, or designated waste disposal site 4. Rotate the integrated pour-out spout into position and empty the tank 5. Rinse the tank, add fresh water and toilet chemical, and reassemble Check the level indicator regularly to anticipate when emptying will be needed.
• 92305/92306 — Porta Potti 135/145: Compact, 2.6 gal waste, ~50 flushes (electric pump) • 92360 — Porta Potti 335: Mid-small, 3.2 gal waste, manual flush • 92814 / 50021 — Porta Potti 345: Medium, 3.2 gal waste, ~33 flushes (this item) • 92820 — Porta Potti 365: Larger, 5.5 gal waste, ~50 flushes, rotating pour-out spout • 92811 — Porta Potti 465: Largest, 5.5 gal waste, electric pump flush For most RV and weekend camping use, the 345 or 365 are the most popular choices. Choose 365 or 465 for longer trips or more users.