Thetford Porta Potti 365 vs 345: Which Is Better? (October 2026)

On this page (7 sections)

1. Porta Potti 365 vs 345: which should you choose?
2. How does the 345's lower height affect fit?
3. What do the tank capacities and indicators tell you?
4. How do the piston pumps compare?
5. When is the 565E Curve a better fit?
6. How should you set up and care for either toilet?
7. Is the Porta Potti 365 or 345 the better buy?

For porta potti 365 vs 345, choose the 345 if you need a lower portable toilet with known tank capacities. Choose the 365 if its taller shape suits your space and you can plan without published capacity figures.

Both use a manual piston pump.

The 365 is 16.3 inches tall and weighs 4 kg. The 345 stands 12.99 inches tall, weighs 3.8 kg, and has a 12 L waste tank with a 15 L flush-water tank.

The 565E Curve is a separate option if you want electric flushing and indicators for both tanks. It is taller and heavier than either manual model.

Porta Potti 365 vs 345: which should you choose?

Choose the 345 for a shorter body and tank figures you can use to plan refills and emptying. Choose the 365 when its taller profile works better in your space.

The 365 and 345 both use a piston pump, so flushing type does not decide this comparison.

The 345 suits compact storage areas, buyers who want stated tank capacities, and people who value a visible waste-tank level. Its flush-water tank has no level indicator, so you still need to keep track of that supply yourself.

The 365 suits buyers whose available space accommodates its taller body and who are comfortable choosing without stated tank capacities. Skip it if known tank volumes or an indicator are essential to your trip planning.

For more choices across the category, see our portable camping toilet guide. It can help you decide whether either of these models fits your needs.

How does the 345's lower height affect fit?

The 345 is about 3.3 inches shorter than the 365, making it the more promising choice for a low storage compartment. Measure the full space and the path into it before choosing either model.

The 345 measures 330 mm high, 383 mm wide and 427 mm deep. The 365 is 16.3 inches high, 15.08 inches wide and 16.81 inches deep, so compare each model's dimensions in the same units.

Check for enough room to place and use the toilet, and to access it for care. A close fit can make routine tasks awkward even if the body itself fits inside the compartment.

The weight difference is only 0.2 kg. If you expect to move the toilet often, consider the overall setup, including where you'll store it and how you'll reach it.

Who should pick the 345 for a low space?

The 345 is the better starting point when height is the main constraint. It is still important to check its width and depth, since a low profile alone does not guarantee that it fits your storage spot.

Choose the 365 only if its extra height fits with room to position and use it. Skip both until you measure if the compartment is tight or hard to reach.

What do the tank capacities and indicators tell you?

The 345 gives you stated capacities for both tanks and an indicator for the waste tank only. The 365's capacities and indicators aren't stated, so choose the 345 if those planning details matter to you.

The 345 has a 15 L flush-water tank and a 12 L waste tank. The waste indicator helps you monitor that tank, but it won't show how much flush water remains.

Plan where you'll refill and empty the toilet before a trip. Don't assume the two tank volumes mean the same number of uses: actual timing depends on how the toilet is used and the maker's care instructions.

Our guide to emptying a portable camping toilet explains how to plan for this task. Follow the instructions for your specific model when handling and cleaning it.

How do the piston pumps compare?

Both the 365 and 345 use a manual piston pump, so neither has an electric-flush advantage. Pick between them based on fit and tank information, then read the model instructions before first use.

With a manual flush, you operate the pump yourself. Set the toilet on a stable, level surface and make sure you can reach the parts needed for normal use and care.

Don't overfill a tank or guess at an emptying method. Follow the model's instructions for preparing, using, emptying and cleaning it, and wash your hands after handling waste or tank parts.

Read our guide on how to use a portable camping toilet before your first trip. It covers the basic routine so you can plan where the toilet will sit and how you'll manage it.

When is the 565E Curve a better fit?

Consider the 565E Curve if you prefer an electric flush and want indicators for both tanks. Skip it if you need the shortest or lightest of these three choices.

The 565E Curve stands 17.64 inches tall and weighs 5 kg. It has a 21 L waste tank, a 15 L flush-water tank, and indicators for both tanks.

That extra capacity information and electric flush may suit a setup where those features matter more than compact storage. Measure first: it is taller and heavier than the 365 and 345.

If privacy is part of your plan, read our camping toilet privacy tent guide. Check the toilet and tent dimensions against the place where you intend to use them.

How should you set up and care for either toilet?

Set the toilet on a stable, level spot with room for use, refilling, emptying and cleaning. Before you leave, confirm the model's instructions and identify a suitable place to handle the waste tank.

At home, measure the storage area and route from storage to use. On site, choose a private, level location that keeps the toilet easy to reach without blocking a walkway or taking up a space needed for other gear.

Prepare the toilet as its instructions direct, including filling the flush-water tank if required. Use the piston pump as instructed, keep track of supplies, and avoid forcing parts or pouring unapproved cleaners into the tanks.

After use, empty and clean the toilet according to its instructions. Secure it for transport, and wash your hands after handling the toilet or waste tank.

Common mistakes include buying based only on height, overlooking width and depth, assuming the 345 has a flush-water indicator, and guessing the 365's capacity. Measure the spot and use the published tank details where available before deciding.

Is the Porta Potti 365 or 345 the better buy?

Pick the 345 if you want a lower body, known tank capacities and a waste-tank indicator. Pick the 365 if its taller shape fits your setup and the missing capacity figures don't prevent you from planning.

Both use a manual piston pump.

Choose neither until you have checked the available floor area and clearance. If electric flushing and indicators for both tanks matter more, compare the 565E Curve and confirm that its larger body suits your storage space.

For a wider view of the category, start with our portable camping toilets guide and use the Thetford Porta Potti 365 review for more detail on the 365. The right choice is the one whose dimensions, operation and tank information suit your routine.

Frequently asked questions

What is the main difference between the Porta Potti 365 and 345?

The 365 is taller at 16.3 inches, while the 345 is 12.99 inches tall and weighs 3.8 kg compared with the 365's 4 kg. Both use a piston pump.

The 345 has stated tank capacities and a waste-tank level indicator.

Its flush-water tank is 15 L and its waste tank is 12 L.

Does the Porta Potti 345 show both tank levels?

No. The 345 has a level indicator for its 12 L waste tank, but no indicator for its 15 L flush-water tank.

If you want to see both tank levels, consider the 565E Curve, which has indicators for its flush-water and waste-holding tanks.

Which Porta Potti is lighter, the 365 or 345?

The 345 is slightly lighter at 3.8 kg, compared with the 365 at 4 kg. The difference is 0.2 kg, so body height, tank information and the space available may matter more to your choice than weight alone.

Should I consider the Porta Potti 565E Curve?

Consider the 565E Curve if you prefer an electric flush and want a stated 21 L waste-tank capacity. It also has indicators for both tanks.

At 17.64 inches tall and 5 kg net, it is taller and heavier than either the 365 or 345.