Thetford Fresh Up Sets refurbish a cassette toilet in a caravan, motorhome, or campervan using two new parts: a brand-new waste-holding tank and a new toilet seat with lid. Both arrive in one box, ready to fit without tools. The range covers every current Thetford cassette toilet sold in the UK over the last 25 years, from the swivel-bowl C200 to the latest bench-style C500. Owners typically fit one after buying a second-hand vehicle, when an ageing cassette starts to smell despite cleaning, or to carry as a spare on longer trips. All sets are genuine Thetford and carry a three-year warranty.Which Thetford Fresh Up Set fits my cassette toilet?
Find the data badge underneath your waste-holding tank or on the bottom of the cassette and read the Cxxx model code. Match it to the corresponding set: C200, C220, C250/C260, C2/C3/C4, C400, or C500. C2/C3/C4 toilets also need a left-hand or right-hand choice based on which side the cassette removes from.
The collection covers six toilet families, each with its own cassette shape and seat profile. The C200 set fits swivel-bowl toilets with the distinctive yellow cassette and a 17-litre waste tank, common in compact caravans and campervans. The C220 set suits comfort-orientated installations with an 18-litre wheeled cassette and a 2 x 90° rotating bowl. The C250/C260 set fits plastic-bowl swivel toilets with the orange-handled 17.5-litre cassette, also referred to by some retailers as the C234 family. The C2/C3/C4 set is the bench-style replacement and is the only set in the range that requires a left-hand or right-hand variant. The C400 set serves the more recent bench cassette toilets with a 19.3-litre tank fitted with three level indicators, and the cassette can be converted between left and right configurations. The C500 set fits the latest bench cassette toilets with a 19.7-litre tank.
Three customer groups buy Fresh Up Sets most often. Buyers of used caravans and motorhomes fit one straight after purchase to skip a deep clean of someone else's waste tank. Full-timers, festival-goers, and free campers run a second cassette to double their capacity between dump points. Owners of vehicles eight to ten years old replace tired cassettes when the seat starts to discolour, the lid hinges loosen, or persistent odours linger after cleaning. Many also buy alongside Thetford toilet chemicals, Aqua Soft toilet paper, Seal Lubricant Spray, and the Twusch porcelain inlay to complete a full bathroom refresh.
Selecting the right set comes down to four checks. First, identify your toilet model from the data badge, since cassettes from one series will not fit another. Second, for C2/C3/C4 toilets, sit on the toilet and check which side the external wall is on (wall on your left means a left-hand set; wall on your right means right-hand). Third, look at your existing seat material - the seats supplied in plastic-bowl Fresh Up Sets do not fit ceramic bowl variants like the C263 or C403 ceramic versions. Fourth, decide between entry-level (C200) and premium options (C400, C500) based on what you have. Mid-range sets covering C220, C250/C260, and C2/C3/C4 are the highest-volume sellers.
The most common ordering mistake is skipping the data badge check, leading to incompatible cassette dimensions. The second is choosing the wrong hand for C2/C3/C4 toilets, which is not returnable once fitting has been attempted. If your toilet was made before June 2000, your lip seal specification differs from current models and may need separate replacement (part 23721 for post-2000 toilets). Apply Thetford Seal Lubricant Spray to the lip seal before fitting the new cassette - this prevents the rubber drying out and reduces odour migration. Fresh Up Sets do not include flush mechanisms, blade assemblies, or mounting brackets, so check these for wear before installation. Keep the old cassette as a spare for emergencies once the new one is in place. Returns of sanitation products are not accepted once installation has been attempted, so confirm the model and hand before ordering.How many caravans and motorhomes are there in the UK?
The UK has well over three-quarters of a million touring caravans and motorhomes in active use, and is Europe's third-largest leisure vehicle market with just under 26,000 new registrations in 2025. Motorhome registrations rose 20.2% in 2024, and the caravan and motorhome manufacturing sector contributes over £1.8 billion to the UK economy each year. Thetford cassette toilets remain the dominant sanitation solution across this fleet.
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Frequently Asked Questions
What's included in a Thetford Fresh Up Set?A Thetford Fresh Up Set contains a brand-new waste-holding tank and a matching toilet seat with lid, packaged together in one box. Wheeled-cassette variants (C200, C220, C250/C260, C2/C3/C4, C400, C500) come with integrated wheels and a pull-out handle on the tank. The set does not include flush mechanisms, blade assemblies, mounting brackets, or toilet chemicals, which remain part of the original toilet base unit.How do I identify which Thetford Fresh Up Set I need?Look for the data badge underneath your waste-holding tank or on the bottom of the cassette itself. It shows a model number starting with C, such as C200, C220, C250, C260, C400, or C500. If the badge is missing, identify visually: the C200 has a tall yellow cassette and a swivel bowl, the C2/C3/C4 has a wider bench-style base, and the C400/C500 are the most modern bench toilets. For C2/C3/C4 you also need to check which side the cassette removes from to choose left-hand or right-hand.What's the difference between a left-hand and right-hand Fresh Up Set?Left-hand and right-hand refers to which side of the vehicle the cassette is removed from, and this only applies to the C2/C3/C4 set. Sit on the toilet inside the caravan or motorhome. If the external wall is on your left, you need a left-hand set; if it's on your right, you need a right-hand set. This determines the orientation of the pour-out spout and emptying mechanism. Ordering the wrong configuration means the cassette will not fit correctly into the toilet base.Will a new Fresh Up Set fit my older Thetford cassette toilet without wheels?Yes. Thetford redesigned the C200 and C2/C3/C4 cassettes to include wheels and a pull-out handle, and kept the overall external dimensions the same as the older non-wheeled versions. The newer wheeled cassettes are a direct replacement for older wheel-less models in the same series. If your toilet was manufactured before June 2000, your lip seal specification is different and may need separate replacement using part 23721.How do I fit a Thetford Fresh Up Set?Installation is tool-free for most models. Remove the existing seat by releasing the hinge pins at the rear, then fit the new seat using the same fixings. Apply Thetford Seal Lubricant Spray to the lip seal on the toilet base before sliding the new waste-holding tank into the cassette compartment, ensuring it locates against the back stop and the safety catch engages. Add the correct dose of toilet chemical and around 2-3 litres of water via the pour-out spout before first use. Total fitting time is usually under ten minutes.What are the waste tank capacities for each Fresh Up Set?The C200 cassette holds 17 litres, the C220 holds 18 litres, the C250/C260 holds 17.5 litres, the C2/C3/C4 holds 18-19 litres depending on variant, the C400 holds 19.3 litres, and the C500 holds 19.7 litres. The C400 cassette is fitted with three level indicators and most other modern tanks have an LED warning when emptying is needed. Typical capacity equates to roughly four to five days of use for two people.Can I use a Fresh Up Set as a spare cassette?Yes, many owners buy a Fresh Up Set specifically as a spare waste-holding tank. Carrying a second cassette doubles your capacity between disposal points, which is useful at festivals, on extended free camping trips, and at remote pitches where facilities fill quickly. The spare seat and lid that come with the set can be stored as backup parts or fitted alongside the new tank. A Thetford Cassette Carry Bag is available separately for protected transport and storage.Why buy a Fresh Up Set rather than just a replacement cassette tank?A Fresh Up Set bundles the waste-holding tank with a new seat and lid at a lower combined price than buying both items separately. If your cassette is over five years old, the seat and lid usually show wear, discolouration, or loose hinges at the same time as the tank. Buying the components individually only makes sense when one part is genuinely fine and you need to replace just the other.Do Fresh Up Sets come with a warranty?Genuine Thetford Fresh Up Sets carry a three-year manufacturer's warranty when fitted to a compatible toilet and used in line with Thetford's care guidelines. The warranty covers manufacturing defects in materials and workmanship. Damage caused by bleach, household acids, harsh cleaners, or non-Thetford toilet additives is excluded, as these can degrade plastic surfaces and rubber seals.Can I return a Fresh Up Set if it doesn't fit?Unopened Fresh Up Sets in original packaging can be returned within the standard returns window. Once installation has been attempted, returns of sanitation products are not accepted for hygiene reasons - this is industry standard across all UK leisure retailers. This makes correct model identification essential before ordering, especially when choosing left-hand or right-hand for the C2/C3/C4 set. Check the data badge on your existing cassette first.Does the seat in a Fresh Up Set fit ceramic toilets?No. The seat supplied in a Fresh Up Set is designed for plastic-bowl Thetford cassette toilets only. Ceramic-bowl models such as the C263 and C403 ceramic versions use a different seat profile and fixing arrangement. If your toilet has a ceramic bowl, source a ceramic-compatible seat separately and buy the replacement cassette tank as an individual spare part rather than the full Fresh Up Set.When should I fit a Thetford Fresh Up Set?Fit a Fresh Up Set when the cassette is around eight to ten years old, when persistent odours remain after cleaning with Thetford Duo Tank Cleaner, when the seat hinges loosen or discolour, or when the cassette develops hairline cracks. Buyers of second-hand caravans and motorhomes often fit one straight after purchase regardless of the cassette's age, simply for hygiene reasons. Thetford also recommends replacing the lip seal every four to six years as part of routine maintenance.
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