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Thetford Toilet Cassette Maintenance
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Thetford Toilet Cassette Top Tip
Before we start discussing maintenance of the Thetford toilet cassette, did you know you can buy a freshen up kit which comprises of a new toilet seat and a new cassette. So, if you’ve just bought a second hand caravan and don’t want the hassle of using something someone has been happily sitting on and depositing into for years, you can get lovely clean new stuff. So, no need to read the rest of this article, just buy one of these… ( Make sure you buy the correct one )
Thetford 9338262*
- With adapter c250 c260
- Style: Vehicle specific
- Country of origin is Spain
- The package dimensin of the product is: 11.4lbs
Sale
Thetford 2334062 Caravan Motorhome Cassette Fresh Up Kit C200*
- Holding tank for Thetford C200 series ( capacity 17 liters )
- The Toilet fresh-up Set is an easy and economic way to make a used Cassette Toilet as good as new
- The set includes: Seat & Cover and Waste-holding tank with wheels!
Thetford 5164262 Camping Toilet Fresh-Up Sets for C-400*
- Auto accessory
- Easy to use
- Premium quality
You didn’t buy one? Read on my friends…..
Unlike the toilet at home, it’s not a flush and forget affair. Things need doing and doings need getting rid of. It’s not just some magic hole where everything just disappears into never to be seen again. Unless of course you work at a sewage farm, where you’d see it again everyday. Toilets are a serious matter and they are not to be sniffed it, so let’s take a look at one.
The toilet cassette is this thing right here:
Thetford Toilet Cassette Parts
Looking at the Thetford toilet cassette there’s a number of parts. No need to memorise them all, unless you’d like to…(Your specific toilet may differ to the one shown below)
Firstly, the pour out spout (29) where you empty the loo from. Remove the cap (28) and poor out the contents. The cap is also a measure.
Just below the spout is the handle, where you can hold the cassette.
Below that is a large circle (4 waste holding tank plate) with an orange knob (1 blade opener), this operates the flap, which you open to flush water through to give it a good clean after emptying. Before doing that though you need to remove the flap by sliding it towards the handle. This whole piece can also twist out for even easier cleaning, probably at the end of the season.
There are obviously two wheels (32) and at the top is a pull out handle, which makes it easier to get the the disposal point. Lastly, is the little orange button at the bottom. When emptying you can press this and it lets air in to help move the contains quickly through the pipe
Pink, Blue or Green Fluid?
You may have seen toilet fluid, it comes in different colours, but which colours are used where?
Pink is to be added to the water that flushes to toilet
Green and Blue do the same thing. It’s added to the toilet cassette and breaks down all the nasty stuff in there. Green, as you can probably guess is more environmentally friendly. Blue contains all sorts of chemicals. Where you need to be careful is when a site uses something like a septic tank which breaks down toilet stuff naturally. Don’t use blue in this case, only green. If in doubt either use green or ask.
Thetford Toilet Cassette – Cleaning
Water can be used to flush clean the thetford toilet cassette through and it’s probably advisable to wear some kind of rubber gloves, better safe than sorry. There are various toilet cleaners you can use, but we mainly flush with water thoroughly
Bestseller No. 1
Thetford 30459CO Toilet Fluid and Rinse Concentrate Duo Pack, Blue & Pink, 1.53 Litre*
- Duo pack containing a 780ml bottle of Aqua Kem Blue Lavender concentrate and a 750ml bottle of Aqua Rinse concentrate; Aqua Kem Blue; Powerful and easy to use toilet fluid for the waste holding tank; Outstanding odour control; Liquifies waste for easier tank emptying; Reduces gas build-up; Aqua Rinse Plus; Forms a protective layer to block build-up and bacteria; Highly effective for a smoother flush; Improved formula keeps flush water clean
Bestseller No. 2
Thetford Toilet Bowl Cleaner 750ml Chemical Caravan Boat Motorhome*
- Thetford Toilet Bowl Cleaner 750ml Chemical Caravan Boat Motorhome
- Brand : Thetford
- Product type: CLEANING AGENT
- 750.00 ml Pack of 1
- cleaning spray cleaner clean motorhome boat toilet potti caravan chemical motorhomes portaloo living exterior outdoor boats outdoors bowl
SaleBestseller No. 3
Thetford 20566AK Bathroom Cleaner Spray – 500ml – Green*
- For all plastic surfaces including the outside of the toilet
- Guaranteed perfect hygiene
- Active foam removes limescale deposits
- Gives a beautiful shine
SaleBestseller No. 4
Thetford Aqua Kem Rinse Concentrate, 0.75 litres*
- Contents: 750 ml.
- Sanitary concentrate for flush water, additive concentrate for fresh water tank.
- Small and powerful: A powerful, highly effective, two and a half times concentrated sanitary fluid for the waste-holding tank of cassette and portable toilets.
SaleBestseller No. 5
Thetford 30619CX Aqua Kem Concentrated Blue Toilet Fluid, 780 ml*
- Powerful and easy to use concentrated toilet fluid for the waste holding tank
- The 780ml concentrated bottle is equivalent to a standard 2 litre bottle
- Outstanding odour control and helps to reduce gas build-up
- Liquifies waste for easier tank emptying
- 1 dose lasts up to 5 days
Thetford Toilet Cassette – Maintenance
As this is the title of the article, we’d better get around to some maintenance. Other than keeping it clean there’s not a great deal to do. You need to lubricate the seal on the part that opens underneath the toilet bowl. You can use olive oil, just open the door by twisting the knob beside the hole and use olive oil to lubricate the seal. You can also use Thetford Seal Lubricant
Thetford Siliconenspray*
- Regular application on the valve seal ensures its flexibility and durability
- Thetford Lubricant Spray
- Brand: Thetford.
There is a possibility that the float may get stuck, toilet paper can get stuck around it and make it stick in the “full” position. To clear this open the sliding cover that covers the hole half way and push in an anti clockwise motion to remove the plastic casing that holds the seal. (See our video below) This way you can get access to the float which is in one of the corners, just have a feel around (with gloves on) and see if you can free the float. Don’t force it. It in doubt just fill it with water and give it a little shake to dislodge any loo roll.
The handle can come loose. Simply pop the top of the handle off, but getting a blunt knife in the gap, just below the word “Thetford” and it will expose screws. You can re tighten these and pop the piect you just popped off back in place.
Thetford Toilet Cassette Spares
Bestseller No. 1
Thetford 9339362 Fresh-Up Set C250, C260*
- Waste holding tank with wheels
- Seat And Cover
- Works with C250 and C260
Bestseller No. 2
Thetford Screw measuring cap 25810-78*
- Country of origin: Netherlands
- Package weight: 7.2 kg
- Package dimensions (L x W x H): 225.0 x 121.0 x 74.0 mm
- Colour: yellow
Bestseller No. 3
YUCKMZ Compatible with Thetford Toilet Cassette C250 C260 Spare Holding Waste Tank Mechanism Replacement 5072706*
- Reference Part Number: 5072706,50727-06
- Fitments: Compatible with Thetford C250 & C260 SC250/260 Spare holding tank mechanism
- Premium Material: This Toilet Waste Tank Mechanism is made of high quality material to ensure stable performance and durability.
- Please compare your original before buying to check if this toilet waste tank kit is what you need.
- The Waste Tank Mechanism is easy to disassemble and assemble, just turn to remove old one and vice versa,requires no tools and is easy to use.
Bestseller No. 4
cantondz Compatible with Thetford Toilet Cassette C250 C260 Spare Holding Waste Tank Mechanism Replacement 5072706*
- Fitments: Compatible with Thetford C250 & C260 SC250/260 Spare holding tank mechanism
- Reference Part Number: 5072706, 50727-06
- Premium Material: This Toilet Waste Tank Mechanism is made of high quality material to ensure stable performance and durability.
- The Waste Tank Mechanism is easy to disassemble and assemble, just turn to remove old one and vice versa,requires no tools and is easy to use.
- If you have any problem in our products, please feel free to contact us. We will try our best to give you a satisfied answer within 24 Hours
Bestseller No. 5
Thetford C200 Series Fresh Up Kit Replacement Cassette with Toilet Seat Caravan Motorhome*
- Fresh-up set C200
- With wheels and handle
- Consists of: toilet seat with lid, waste tank with wheels and handle
Bestseller No. 6
DCC Camping Products 301/069 Automatic Valve Cassette No. 23722-74*
- White River Outdoor have a lifetime of experience and enthusiasm for all things outdoor
- Country of Origin: Netherlands
- Model number: 301/069
- The package dimension of the product is : 14.9″L x10.6″W x5.1″H
Bestseller No. 7
Thetford SC250/260/400/500 Blade*
- Sliding plate for waste tank C250 / C400
- Manufacturer no. 50731
Bestseller No. 8
Spare Holding Waste Tank Mechanism Compatible with Thetford Toilet Cassette C250 C260 SC250 5072706*
- Fitments: Toilet Waste Tank Kit are Compatible with Thetford C250, C260, SC250
- Reference Part Number: 5072706, 50727-06
- Tight Sealing:The lid has a sealing ring. When you press the yellow button, the sealing washer’s arm locks it in place, keeping smells from escaping
- Easy Installation: The toilet waste tank mechanism can be easily disassembled and reassembled without any tools. Simply twist to remove the old one and replace it with a new one.
- After-sale guarantee:If you have any problem in our products, please feel free to contact us. We will try our best to give you a satisfied answer within 24 Hours
Bestseller No. 9
Thetford CARAVAN CASSETTE TOILET TANK SLIDING COVER*
- The sliding cover will fit C2, C3 and C4 models
- Item Package Length: 23.8 cm
- Item Package Width: 13.0 cm
- Item Package Height: 8.2 cm
SaleBestseller No. 10
23721 Replacement Toilet Lip Seal 110mm Compatible with Thetford Cassette Toilets C200 C250 C400 C500 C2 C3 C4 – Caravan Motorhome Toilet Waste Tank Seal, Thetford Toilet Spares and Cassette Seal Fix*
- [Compatible with Thetford RV Toilets] Designed for Thetford RV cassette toilet models C200, C250, C400, C500, C2, C3, and C4 made after June 2000. This thetford rv toilet cassette seal replaces part 23721 and restores optimal sealing in waste systems.
- [Precise Fitment for Reliable Sealing] This replacement toilet lip seal features an outer diameter of 110mm and inner diameter of 80mm, offering a secure fit for compatible waste tanks. Always verify measurements before purchasing thetford toilet spares.
- [Essential Thetford RV Toilet Parts] Whether fixing leaks or maintaining your system, this thetford rv toilet parts cassette seal helps preserve hygiene and prevent odours in RVs, campervans, and caravans. A must-have among reliable thetford rv toilet parts.
- [Direct Replacement, Easy Installation] No tools or special skills required. This 23721 toilet seal is a direct replacement for old, damaged or worn seals in Thetford toilet cassettes—keeping your system leak-proof and fresh during all your travels.
- [Durable and Caravan-Ready] Made from long-lasting, chemical-resistant materials, this thetford rv toilet cassette lip seal withstands regular use and sanitation treatments—ideal for caravan owners seeking dependable thetford toilet spares.
Thetford Cassette Toilets – Full Range
Thetford Toilet Cassette Maintenance Our Video
For a practical video on replacing your Thetford toilet cassette seal, see the below
*Last update on 2025-11-14 / Affiliate links / Images from Amazon Product Advertising API
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2 responses to “Thetford Toilet Cassette Maintenance”
Why does the maintenance video not play, I’m having trouble with the full light not working
Sorry you’re having issues, it plays ok for me? You could view from our youtube channel too.
Re light, it could be that the “float” is stuck? Try giving the cassette a good rinse out, may dislodge it.