Introduction
The Thetford Porta Potti 365 is a high-quality, durable, and convenient portable toilet designed for use in various settings such as RVs, camping, boating, and other outdoor activities. Its compact design and efficient piston pump flushing system ensure a comfortable and hygienic experience. This manual provides detailed instructions for the proper setup, operation, maintenance, and troubleshooting of your Porta Potti 365 to ensure long-lasting performance.
Components
The Porta Potti 365 consists of two main sections: the upper section (flush water tank and toilet bowl) and the lower section (waste holding tank).
Upper Section

This image shows the complete Thetford Porta Potti 365 portable toilet with its lid open, revealing the toilet bowl and the flush water tank cap. The model number "365" is visible on the side.
- Toilet Seat and Cover
- Flush Water Tank: Holds clean water for flushing.
- Piston Pump: Manual pump for flushing.
- Fill Cap: For adding flush water and treatment.
Lower Section

This image displays the lower section of the Thetford Porta Potti 365, which is the waste holding tank. It features the waste outlet and the handle for carrying.
- Waste Holding Tank: Collects waste.
- Waste Outlet: For emptying the tank.
- Level Indicator: Shows when the waste tank is full.
- Vent Button: Releases pressure during emptying.
- Sliding Valve: Separates the upper and lower sections and seals the waste tank.
Setup and Assembly
Separate the two sections: Ensure the sliding valve is closed. Release the latches on the back of the toilet to separate the upper section from the lower waste holding tank.
This video demonstrates how to separate the upper and lower sections of the Porta Potti 365 by releasing the rear latches and lifting the top part. It also shows how to reassemble the unit.
Prepare the waste holding tank: Remove the waste outlet cap and add the recommended amount of Thetford waste tank treatment (e.g., Aqua Kem Blue) and 1-2 liters of water. Replace the cap securely.

This image shows the waste holding tank with its handle extended, ready for transport or emptying. The waste outlet is visible on the side.
Fill the flush water tank: Open the fill cap on the upper section and add clean water. For optimal hygiene and odor control, add Thetford flush water additive (e.g., Aqua Rinse). Close the cap securely.

This image provides a top-down view of the Porta Potti 365, highlighting the flush water tank cap in the open position, ready for filling.
Reassemble the toilet: Align the upper section with the lower waste holding tank and secure the latches until they click into place. Ensure a tight seal.
Operating Instructions
Before use: Ensure the sliding valve is in the closed position to prevent odors and splashing.
To use: Open the sliding valve by pulling the handle forward. After use, close the sliding valve by pushing the handle back.
Flushing: Press the piston pump handle down firmly and release to flush the bowl. Repeat as necessary until the bowl is clean.
Maintenance and Cleaning
Regular maintenance is crucial for the longevity and hygienic operation of your Porta Potti 365.
Emptying the Waste Holding Tank
Check the level indicator: When the indicator turns red, the waste tank is full and needs to be emptied.
Separate sections: Ensure the sliding valve is closed. Release the latches and separate the upper section from the lower tank.
Transport the waste tank: Carry the waste tank to a designated disposal point (e.g., RV dump station, public toilet). Use the integrated handle for easy transport.
Empty the tank: Place the tank on the ground, rotate the waste outlet pipe upwards, and remove the cap. Press the vent button while emptying to prevent splashing and ensure smooth flow. Rinse the tank with water if desired. Replace the cap and close the vent button.
Cleaning
Clean the toilet bowl and exterior with a mild, non-abrasive cleaner. Avoid harsh chemicals that can damage plastic or seals.
Periodically clean the sliding valve and rubber seals with Thetford Seal Lubricant or silicone spray to maintain flexibility and prevent leaks.
For thorough cleaning, Thetford offers specialized cleaning products for both the waste and flush tanks.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Poor flush performance | Low water level in flush tank; clogged pump; air in pump. | Refill flush tank; clean pump mechanism; prime pump by pumping several times. |
| Odors escaping | Sliding valve not fully closed; waste tank full; insufficient waste treatment. | Ensure valve is closed; empty waste tank; add more waste treatment. |
| Leaking from waste tank | Damaged or dry rubber seal; waste outlet cap not secure. | Lubricate or replace rubber seal; ensure cap is tightly closed. |
Specifications
- Model: Porta Potti 365
- Part Number: 92820
- Color: White
- Product Dimensions: 16.81"D x 15.08"W x 16.3"H
- Material: Plastic
- Item Weight: 8.8 Pounds (approx. 4 Kg)
- Flushing System: Piston pump
- Waste Tank Capacity: 5.5 Gallons (approx. 21 Liters)
- Flush Water Tank Capacity: 4 Gallons (approx. 15 Liters)
Warranty and Support
The Thetford Porta Potti 365 comes with a LIMITED WARRANTY. For specific warranty details, claims, or technical support, please refer to the warranty card included with your product or visit the official Thetford website. You can also contact Thetford customer service for assistance.
For more information and product support, visit the Thetford Store on Amazon.