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Enjoy comfort and convenience on the water with the Thetford Porta Potti 550P MSD, a premium portable marine toilet designed for boats, RVs, and off-grid use. This top-of-the-line model features a piston flush system for powerful, reliable flushing and a sealed holding tank to control odors and prevent leaks. As an MSD-compliant (Marine Sanitation Device) toilet, it meets U.S. Coast Guard requirements for use on boats when properly secured and operated in accordance with local regulations.
The Porta Potti 550P offers a high-profile, home-style seat height for added comfort, along with a built-in battery-powered level indicator that lets you easily monitor fresh water and waste tank levels. Its durable, easy-to-clean construction and secure locking system make it a dependable sanitation solution for cruising, weekend trips, and overnight stays on board.
MSD Capability: Equipped with a 1.5" threaded pump-out fitting, allowing it to be permanently plumbed to a deck waste fitting.
Piston Pump Flush: Features a smooth, easy-to-use manual piston pump that delivers a powerful, thorough rinse every time.
Contemporary Styling: Modern white and grey aesthetic with an integrated lid latch to keep the unit secure during rough transit.
Large Capacity: One of the largest holding tanks in the Porta Potti lineup, reducing the frequency of pump-outs.
Level Indicators: Features easy-to-read tank level indicators for both the fresh water (flush) tank and the waste holding tank.
| Feature | Specification |
| Model Number | 92856 (550P MSD) |
| Waste Tank Capacity | 5.5 Gallons (21 Liters) |
| Fresh Water Capacity | 4.0 Gallons (15 Liters) |
| Flush Type | Manual Piston Pump |
| Seat Height | 16.5" (42 cm) – Comfortable, full-height seating |
| Dimensions | 17.6"H x 15.2"W x 17.7"D |
| Empty Weight | Approx. 11.5 lbs |
| Material | Durable, high-gloss easy-clean plastic |
(1) Thetford Porta Potti 550P MSD Unit
(1) MSD Fitting Kit (For permanent pump-out connection)
(1) Sample Pack of Aqua-Kem Waste Digester
(1) Sample Pack of Aqua-Soft Toilet Tissue
Owner’s Manual and Installation Guide
Note: Permanent mounting hardware and deck pump-out hoses are typically sold separately to match your specific boat or RV layout.
Boats, yachts, and small cabins
RVs and camper vans
Camping, tiny homes, and remote locations
Part Number: 92856
Condition: New
Category: Marine Sanitation / Portable Toilets
Manufacturer : Thetford Marine
Ships within 48 hours · Estimated delivery Jun 26 - Jul 1
US$40
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