Everything You Need To Know About Your Caravan’s Toilet

The caravan toilet is the system nobody wants to talk about and everybody needs to understand. It’s one of the first things that separates a comfortable caravan from a basic camping setup, and mismanaging it is the fastest way to create an unpleasant (and potentially expensive) situation. The good news: modern caravan toilets are hygienic, easy to manage, and far less unpleasant than most people imagine.

Types Of Caravan Toilets

Cassette Toilet

The most common type in Australian caravans. A permanently installed toilet bowl with a removable waste cassette underneath, accessed via an external hatch. When the cassette is full (typically 17 to 22 litres), you remove it, wheel it to a dump point, empty it, rinse it, and replace it. A couple using the toilet for everything gets 3 to 5 days from a standard cassette. The Thetford C220 and C260 series ($800 to $1,500) are the most common factory-fitted units. The Dometic CTS 3110 ($700 to $1,200) is the main alternative. Aftermarket upgrades to a Thetford C260 with swivel bowl are popular for improving comfort.

Composting Toilet

Separates liquids and solids. Liquids go into a removable container; solids go into a composting chamber with a medium (coconut coir or similar) that absorbs moisture and breaks down waste. No chemicals required. No water needed for flushing. Emptying is less frequent and less unpleasant than a cassette. Growing in popularity for off-grid travel. The Nature’s Head ($1,500 to $1,800) is the most established brand in Australian caravans. The Separett Villa 9215 ($1,300 to $1,600) is a strong alternative with a simpler design. The Cuddy Composting Toilet ($800 to $1,000) is a more affordable newcomer gaining traction.

Gravity Flush (Black Water Tank)

A domestic-style toilet that flushes waste into a black water holding tank underneath the van. The tank is emptied at a dump point via a valve or pump-out. More common in motorhomes and larger caravans than in standard tourers. Feels most like a home toilet but requires access to dump points and careful tank management.

Portable Toilet

A standalone unit (not permanently installed) with an integrated small waste tank. Common in camper trailers and pop-tops that don’t have a built-in bathroom. Functional but limited capacity (10 to 12 litres). The Thetford Porta Potti 365 ($250 to $300) is the most popular model with a 15-litre waste tank and proper flush. The Dometic 976 ($200 to $280) is a solid alternative.

Managing Your Toilet

Use the right chemicals. Cassette toilets require chemical treatment to break down waste and control odour. Use a chemical designed for caravan cassettes (Thetford Aqua Kem, Dometic PowerCare). Don’t use household toilet cleaners; they can damage seals and don’t work in a cassette system.

Use caravan-safe toilet paper. Quick-dissolve toilet paper breaks down in the cassette and prevents blockages. Standard household toilet paper can cause issues. Most caravan accessory stores stock it.

Empty before it’s full. An overfull cassette is heavy, awkward to handle, and risks spillage. Empty when it’s three-quarters full. A sensor or indicator on the cassette shows the level.

Clean the seals. The blade seal between the bowl and the cassette needs to stay lubricated and clean. Apply seal lubricant (Thetford Seal Lubricant) periodically to keep it functioning properly and prevent odour leakage.