Thetford Lip seal for Thetford Toilets (23721) image 1

Thetford Lip seal for Thetford Toilets (23721)

£12.85(inc VAT) £16.99
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Cassette lip seal suit Late Thetford toilets. This is the large seal that fits on the top of the cassette tank.

Suitable for the following Thetford toilets produced after 15 June 2000.
  • Thetford C2
  • Thetford C3
  • Thetford C4
  • Thetford C200
  • Thetford C400


Thetford part number 23721.

EAN-13 : 8710315549812

3 FAQs on the Thetford Lip seal for Thetford Toilets (23721)

I have a 2000 swift caravan with a swivel toilet I need a new top seal is a post 2000 one going to fit
Yes it is.
Hi Tom Last year I purchased my Bailey caravan and have a problem with the c200cs cassette toilet. With the cassette blade closed fluid in the bowl leaks slowly into the cassette housing. I changed the lip seal but still have the same problem. The lip seal I purchased was for the pre-2000 model as I thought this would be right, but am now wondering if the previous owner changed the cassette to the later model. Is there a way I can tell the difference between the 2 cassettes. Thanks Bryn
The seal that you should have for this toilet is our part 229428 Thetford part 23721, If you have purchased the pre 2000 seal then you have the incorrect seal.
I have a Thetford 200 plunger flush toilet pink solution appears too leak very slightly around the joints of the holding tank
If you are referring to the waste holding tank then it is very unlikely that the joints are leaking. It is more likely that the lip seal at the top of the tank is worn which will allow a small amount of pink liquid to run down the outside of the tank and end up at the tank joint area. first thing is to replace the seal, our ref. 129428.

131 Customer Reviews on Thetford Lip seal for Thetford Toilets (23721)

Fits As It Should

by Sgt. Oddball (11 Aug 2024)
4 star review(4/5)
Thetford lip seal for toilet, part no 33721. Arrived from luesureshopdirect in good time, and is a perfect fit. This is for the later model of Thetford cassette toilets, being slightly thinner than the old ones. Check which model you have (it goes by year) before you buy. Easy to fit, 8 screws, a clean, rescrew, job done. It's actually surprising how these seals wear, you'll see when you compare the old with the new. No more leaks when carrying!

Excellent Service From This Company

by Mike Smith (27 Feb 2024)
5 star review(5/5)
As with previous orders, an excellent service from this company. After ordering, I realised that I had a voucher and so emailed them asking how I could use the voucher. They helped me cancel the original order, reorder using the voucher and then refunded VAT (I live in Jersey). Cost of p&p also extremely reasonable. Very helpful, prompt and friendly service.

Maintenance

by Mr Anthony Buttling (15 Jan 2024)
5 star review(5/5)
The price and delivery was excellent after the xmas break, the cassette was leaking however now it does not, 30minute job max, enough said really not a pleasant job but essential

Cassette Service

by Jim Taylor (16 Oct 2023)
5 star review(5/5)
Thought it was time for a service and clean up for the cassette. Watched a few videos on how to change the seals, seems straightforward. New seal and blade after I soaked the cassette over night. Good as new and cheaper than replacing the cassette. Thetford parts and chemicals used, all came apart as per the video and went back together perfectly.

In Stock And Fast Delivsry

by Tony King (10 Oct 2023)
5 star review(5/5)
Goods in stock, good price, easy to order, fast delivery.

Good Delivery

by Mr Bulpett (26 May 2023)
5 star review(5/5)
Package arrived a day early on Sunday .

Thetford Cassette Toilet Lip Seal

by Jack Ditchburn (06 May 2023)
5 star review(5/5)
Does what it says on the tin. Very prompt delivery service. Would recommend the product and the company.

Quick And Easy.

by James Floyd (18 Jan 2023)
5 star review(5/5)
Quick and easy replacement and definitely improves the fit.

Refurbishment

by Wales (13 Sep 2022)
5 star review(5/5)
Excellent quality, sorted leaks

Toilet Seel

by Mr James (25 Aug 2022)
4 star review(4/5)
Was delivered as soon as in stock

Just The Job

by -- Select -- Mrs Earle (12 Feb 2022)
5 star review(5/5)
Arrived quickly and fitted perfectly.

Thetford Toilet

by Philip Moore (06 Jan 2022)
5 star review(5/5)
I have used one before on my caravan to prevent leakage did the job perfectly.

Thetford Toilet Cassette Seal

by Jonathan Spinks (10 Sep 2021)
5 star review(5/5)
Arrived quickly, easy to fit using the supplied instructions, although I recommend taking photos before dismantling the toilet cassette as there are subtle variations compared to the instruction photos. New seal has fixed our leak so very pleased.

Did The Job

by Steve Shaw (22 Jun 2021)
5 star review(5/5)
Original part, delivered quickly and easy to fit using supplied instructions. Fixed the leak too.

Seal

by ian (17 Jun 2021)
5 star review(5/5)
had a leaking toilet fitted seal and now i dont have a leaking toilet

Thetford Lip Seal

by Ga Mitchell (22 Apr 2021)
5 star review(5/5)
Brilliant product as the old one's were getting a bit old and needed renewing....great. The service was exceptional and very helpful also very easy to buy from. Well done.

Satisfied Customer

by Mr Chris otoole (11 Mar 2021)
5 star review(5/5)
Delivery was early,contained, Lip seal, Thetford blade opener, thetford vent button assembly Yellow . Refurbished my holding tank and everything went well. excellent service prompt delivery, and quality items,What more can you expect

Perfect

by David (26 Jan 2021)
5 star review(5/5)
Perfect Lip Seal for Thetford Toilet. Easy to replace. Excellent service.

Perfect Replacement

by Chris Brooks (27 Aug 2020)
5 star review(5/5)
I ordered this seal from Leisure Shop Direct and it was delivered 2 days later, very impressed with the speed of delivery. I fitted it in about half an hour followed the very accurate instructions and it did the job perfectly and cured the leaky toilet cassette. Slightly on the pricey side, but it is a genuine Thetford part.

A Good Freshen Up Was Needed!!

by H Mayne (26 Mar 2020)
5 star review(5/5)
These are really simple to swap over!! A good refresh means no smells come up and it now doesn’t leak when you carry it!! Leisure shop direct offered a good efficient service and I would have no hesitation recommending them!

Caravan Thetford Cassette

by Carpman (26 Nov 2019)
5 star review(5/5)
So easy to fit A+

Original Part

by Keith Ohara (17 Nov 2019)
5 star review(5/5)
Easy to install

Does Exactly What It Says.

by Mick H (16 Nov 2019)
5 star review(5/5)
Did the job a treat. Easy to install if you follow the instructions.

Cassette Seal

by D H J Ashdown (13 Nov 2019)
5 star review(5/5)
Quick delivery and easy to fit with full instructions provided and appears to stop leaking when the cassette is removed for emptying

Rubber Seal

by Derry Wilson (01 Nov 2019)
5 star review(5/5)
original OM equipment

Just The Job

by Tom (22 Oct 2019)
5 star review(5/5)
Just as it says in the description

Replacement Seal Does The Job

by Adrian Hunt (05 Oct 2019)
5 star review(5/5)
Replacement part. Does the job.

Replacement Of Leaking Toilet Seal

by Martin (22 Sep 2019)
5 star review(5/5)
Easy to replace and has stopped the leaks

Quick Delivery

by Jack Slade (15 Sep 2019)
5 star review(5/5)
Fast delivery item was genuine.

Not Easy To Unscrew To Fit Once That Done Ok

by Anthony (08 Sep 2019)
5 star review(5/5)
Once fitted ok

Very Quick Delivery From Co.well Packaged And Came As Stated.

by Anne Aberdeen (07 Sep 2019)
5 star review(5/5)
Used it to sort a leak in our motorhome cassette toilet.

Like For Like Replacement - Good Value

by Dl (29 Aug 2019)
5 star review(5/5)
Does what it says

Perfect Fit, Did The Job

by Dave Nicholl (23 Aug 2019)
5 star review(5/5)
Perfect fit, did the job

Great Replacement Seal

by Steven E. (23 Aug 2019)
5 star review(5/5)
Perfect replacement , stopped leaks

Easy And Quick Job Fits Perfectly

by Steve-m. (08 Aug 2019)
5 star review(5/5)
Fitted perfectly and resolved the leak issue in my caravan

Quick Delivery

by Richard M. (04 Aug 2019)
5 star review(5/5)
Works well.

Also Fits C500 Series

by Mr Ritzema (01 Aug 2019)
5 star review(5/5)
As other reviewers have said, the seal seems to be pricey for what it is. Not the most pleasant job as the valve mechanism needs to be dismantled on the Thetford C500 series of toilets after first removing the complete valve unit from the holding tank. I put a smear of Vaseline on the new seal. which has completely cured the effluent leak.

It Is The Real Thing.

by Mike (18 Jul 2019)
5 star review(5/5)
A good genuine part with easy to follow instructions included.

Just What We Needed

by John Jefferis (17 Jul 2019)
4 star review(4/5)
Easy to work out which product to order, prompt response.

No Probs

by Hunter (25 Jun 2019)
5 star review(5/5)
Delivered fast and I fitted it in 30 seconds .

Good

by wayland (05 Jun 2019)
5 star review(5/5)
seal fitted and solved the problem, good service from leisures shop

Thetford Seal

by Casper (26 May 2019)
5 star review(5/5)
First class product and easy to fit. However, I stress not to over tighten. Most important.

Seal

by Bill (04 May 2019)
5 star review(5/5)
good product

Replacements

by Mr kinseyowen (27 Mar 2019)
5 star review(5/5)
Fair price for genuine part

Mr

by Currier (06 Mar 2019)
5 star review(5/5)
very easy to identify the correct seal for our toilet from the website

Easy To Fit

by Dave (27 Feb 2019)
5 star review(5/5)
Perfect replacement for original seal, with full instructions included for installation. Easy to do and completed within 15 minutes.

Brilliant Job

by Mrs Angela Morris (15 Dec 2018)
5 star review(5/5)
Toilet tank is like new again.

What A Cover-up

by Jc Skinner (12 Dec 2018)
5 star review(5/5)
works perfectly

Cassette Seal Replacement

by Mr Munro. (09 Nov 2018)
5 star review(5/5)
When i received the seal i took it and the cassette out to my workshop and replaced the old one for the new which took me about 10 mins after i had a quick look at the fitting instructions which were excellent job done.

Lips Sealed

by Robbo (03 Nov 2018)
5 star review(5/5)
Easy to fit and does the job.

Does What It Says On The Package

by Eb (27 Oct 2018)
5 star review(5/5)
As before it's made for the job

Replaced Lip Seal In C200

by Dave (08 Aug 2018)
5 star review(5/5)
Good quality and easy to fit

Lip Seal C260

by Mr Griffiths (03 Aug 2018)
5 star review(5/5)
Prompt delivery. Instructions ok but be careful to note loose washers falling out (so you know where to put them back) and the slot location of the flapper/flapper arm. Seal all fitted now and works well.

Lip Seal

by P beckett (03 Aug 2018)
5 star review(5/5)
Great and easy to fit.

Lip Seal

by steve (15 Jul 2018)
5 star review(5/5)
great service.

Five Stars

by Dazzer4572 (09 Jul 2018)
5 star review(5/5)
Good product with clear fitting instructions.

Five Stars

by Les (09 Jun 2018)
5 star review(5/5)
Easy DIY replacement

LIP SEAL FOR THETFORD (23721) C200, C250, C260 AND C400 TOILETS

by Ian (24 Apr 2018)
5 star review(5/5)
Easy to fit though photographs in explicit instructions could be more helpful - when everything is black, it is difficult to distinguish between parts. Also, it was very difficult to swivel the assembly to remove - you need more leverage than the lid provides, a piece of wood worked perfectly. Delivery was very quick.

Exactly As Advertised

by Mullman (24 Apr 2018)
5 star review(5/5)
This item arrived quickly, and thanks to the detailed illustrated instructions, I was able to fit it to the toilet cassette.

Spare Part For Cassette Toilet

by Robert Beard (19 Apr 2018)
5 star review(5/5)
Spare part promptly supplied with good fitting instructions.

Lip Seal

by Mike Todd (21 Feb 2018)
4 star review(4/5)
Would have had 5 stars but for a glitch on the web site that meant I had to ring to check order received OK and not twice. Otherwise the order was dispatched and received very quickly.

Replacement Lip Seal

by Mary Bargh (20 Jan 2018)
4 star review(4/5)
Haven't yet used this seal for our Thetford C402 C cassette toilet as our caravan is stored in France. But I am sure it will be ok.

Thetford Spare Parts.

by Mr Watton. (12 Nov 2017)
5 star review(5/5)
Great product , price & super service.

Does What It Says

by Alan Simmonds (04 Oct 2017)
5 star review(5/5)
Arrived promptly, easy to fit and does the job, not much else to say

Five Stars

by Amazon Customer (12 Sep 2017)
5 star review(5/5)
Product was as described.

Five Stars

by Grandma. (04 Sep 2017)
5 star review(5/5)
Excellent it fitted our cassette toilet perfectly.

Five Stars

by Liz Trowbridge (27 Aug 2017)
5 star review(5/5)
Completely satisfied with the product and prompt delivery.

Does What It Should.

by Braedog (23 Aug 2017)
4 star review(4/5)
Did the job as required. Easy to fit.

Lip Seal

by G Holmes (09 Aug 2017)
5 star review(5/5)
Complete kit with easy to follow directions; does the job.

Toilet Cassette Seal

by Dave Baker (08 Aug 2017)
5 star review(5/5)
Original part, delivered fast. Will use this site again.

Lip Seal For Thetford C200 Toilet

by Mr Hastings (11 Jul 2017)
5 star review(5/5)
Excellent delivery, very good price and so easy to fit. Toilet now back in use!

Five Stars

by Amofan. (04 Jul 2017)
5 star review(5/5)
Received in good package. Quick and easy to replace the old one with easy to follow fitting instructions.

Fast Delivery

by Jonesy (23 Jun 2017)
5 star review(5/5)
Fast delivery arrived as promised

Thetford Lip Seal

by Terry (24 May 2017)
5 star review(5/5)
What can I say. Genuine article Prompt delivery, fitted perfectly, good fitting instructions, very happy.

Useful Replacement

by Mr. Wood (09 May 2017)
5 star review(5/5)
Changed whilst replacing blade. Fits fine.

C200 Lip Seal

by Miss Fincken (11 Apr 2017)
5 star review(5/5)
easy to fit, done the job

Perfect Fit.

by Vic Beacham (05 Apr 2017)
5 star review(5/5)
Perfect fit. Thetford were suggesting a different part no.,which appeared to be available from the USA only. Not so, this was the one.

Lipseal Replacement

by Alan (21 Feb 2017)
5 star review(5/5)
Good product but after 8 years Hard open cassette on doing so Damaged mechanism inside Now had to replace a new Cassette at a cost of £90

Thetford Lip Seal

by Brian M (30 Jan 2017)
5 star review(5/5)
Excellent service. Fitted easily, very pleased with the product.

Lip Seal

by Paul (02 Nov 2016)
5 star review(5/5)
It was what I ordered and expected

Does The Job

by Mr Scally (26 Oct 2016)
5 star review(5/5)
Product arrived on time, complete fitting instructions included in packet. Easy to fit as long as you are fairly good at DIY.

Toilet Seal

by Mrs S A Moore (25 Oct 2016)
5 star review(5/5)
quick and easy service

Quality Product

by Mr McAuley (11 Oct 2016)
5 star review(5/5)
Amazingly quick service which meant my loo was quickly back in action.

Kevin Dickson

by kevin dickson (09 Oct 2016)
5 star review(5/5)
service was excellent arrived the next day

Replacement Lip Seal

by Peter Campbell (08 Oct 2016)
5 star review(5/5)
Quick delivery.Good instructions and easy to fit.

Happy With Service

by Mr Singleton (02 Oct 2016)
5 star review(5/5)
Just as ordered

Can't Complain...

by Peter Hough (22 Sep 2016)
5 star review(5/5)
Arrived the following day - good product, did the job!

LIP SEAL FOR THETFORD C200, C250, C260 AND C400 TOILETS

by Rev Bywater (13 Aug 2016)
5 star review(5/5)
It arrived very quickly and was very easy to fix. The instructions were nice and clear. The price was good too.

Five Stars

by Amazon Customer (09 Jul 2016)
5 star review(5/5)
Product is as described and of good condition.

Tony F.

by Mr Francis (08 Jul 2016)
5 star review(5/5)
Easy to install, and delivery was better than expected next day with standard delivery option.

Thetford Seal

by Peter B (08 Jun 2016)
5 star review(5/5)
It's a Thetford genuine spare part, so works fine. good delivery and price. More impressive is the Thetford technical web site that shows you exactly how to change the seal - takes ten minutes tops, very useful.

Five Stars

by William Lee (22 May 2016)
5 star review(5/5)
good product at a good price.

Ideal Replacement Seal

by Tomcat (24 Apr 2016)
5 star review(5/5)
Does the job.

Mr

by T Wright (08 Mar 2016)
5 star review(5/5)
This product was purchased to replace the original seal on my Thetford Cassette and delivery was excellent,about 24 hours from ordering.

Five Stars

by Amazon Customer (02 Dec 2015)
5 star review(5/5)
What can I say. It does what it does.

LIP SEAL FOR THETFORD C200 Toilet

by John Palkin (04 Nov 2015)
5 star review(5/5)
Sorted the problem I had. Good quick delivery.

Lip Seal For Thetford C200

by chip pg (15 Oct 2015)
5 star review(5/5)
This cured an embarrassing leak. Easy to fit. Expensive but fast delivery.

Lip Seal For Thetford C250 Toilet Waste Tank

by moonbeam (29 Sep 2015)
5 star review(5/5)
As usual superb service by leisureshopdirect. The seal arrived within the period one would expect for delivery. Other reviewers of this item did note that the item is easy to fit by following the instructions that come with the seal. The only problem I found with the C250 model, it was very difficult to unscrew the plate by the method described so I eventually had to use a rubber mallet to knock the half entered slide so releasing the screw eventually. Otherwise an easy operation for a competent person. Fitted like a glove and genuine Thetford seal.

Lip Seal Thetford C250 Tank

by Barry Kirke (17 Sep 2015)
5 star review(5/5)
Fast delivery. Very easy to fit with the instructions included. Also gives you the chance to give the tank a good clean. Our van is coming up to five years old and I would have changed the seal sooner if I had known how easy it was. Very highly recamended.

C250 Lip Seal Replacement

by Mr Cornforth (18 Aug 2015)
5 star review(5/5)
I used this 23721 cassette lip seal seal successfully for a 6 year old C250 toilet that had started leaking from the bowl to tank joint. The instruction sheet was clear, but since you have to delve into the innards of the tank I suggest you give it a good clean first ! You will also need a spray can of thetford seal lubricant. The removable circular panel on the top of the tank can be pretty tight to turn - a piece of hardwood of the right width gave more leverage than the suggested method of using the plastic closure flap.

Five Stars

by Mrs A L Campbell (17 Aug 2015)
5 star review(5/5)
Good product, good service

Thetford Cassette Lip Seal

by Tortevite (25 Jul 2015)
5 star review(5/5)
Original seal was 12 years old so confirms Thetford product quality. New seal was fitted in minutes and problem solved.

Thetford Toilet Lip Seal

by Mr Millichamp (09 Jun 2015)
5 star review(5/5)
The toilet seal arrived on time and was fitted in less than 5 minutes. It was very easy to fit using the excellent instructions. What more can I say.

Toilet Cassette Lip Seal

by FM02MZO (20 May 2015)
5 star review(5/5)
I only ordered it to carry as a spare just in case we needed it. The price was reasonable and delivery quick

Five Stars

by Tinkerbell (04 May 2015)
5 star review(5/5)
fitted perfectly no more leaks

Five Stars

by Dave The Rave (06 Apr 2015)
5 star review(5/5)
good deal

Mr

by honeysucklebill (20 Dec 2014)
5 star review(5/5)
First class service as expected top of cassette flooding so the Thetford Lip Seal had to be replaced without too much delay. ordered and received very quickly well done Leisuresalesdirect

Thetford Lip Seal

by Mr Hurley (28 Nov 2014)
5 star review(5/5)
Delivered promptly, excellent service.

Mr C M Paul

by Caravaner (24 Nov 2014)
5 star review(5/5)
brilliant service

Four Stars

by Alvan (22 Nov 2014)
4 star review(4/5)
Good service and price

Thetford Caravan Toliet Lip Seal

by Mr Claxton (04 Nov 2014)
5 star review(5/5)
Does what it says on the tin. Easy to fit in 5 to 10 minutes. Great price and quick delivery.

Tetford Lip Seal

by TARMAC (08 Oct 2014)
5 star review(5/5)
Fast delivery - product instructions were good

What A Buy

by vanman (06 Aug 2014)
5 star review(5/5)
easy to fit good instructions thank you

O King

by Mr King (22 Jun 2014)
5 star review(5/5)
all good

Thetford C200 Etc Lip Seal

by Mr Townsend (27 Oct 2013)
5 star review(5/5)
Looks good quality - not yet fitted as just wanted a spare.

Thetford C200 Lipseal

by Caravaner (30 Aug 2013)
5 star review(5/5)
Speedy delivery time. Easy to fit after reading very clear instructions, worked correctly.

Strightforward Fitting

by wsalk (06 Jul 2013)
5 star review(5/5)
No skill required just a few screws which need a No. 1 point Posidriv / Philips screwdriver

Nothing But Embarasing Than A Leaky Cassete 2

by llangatwgnedd (04 Jul 2013)
5 star review(5/5)
Good instructions and well documented with pictures of replacing the item. Make sure you have purchased the Thetford lubricant or equivalent to keep the seals in good condition and ease of operation. Well packed with quick delivery and reasonable postage rates.

Toilet Seal

by Sammo (11 Jun 2013)
5 star review(5/5)
very good efficient service.

Thetford Spares

by BobW (10 Apr 2013)
5 star review(5/5)
Promptly deliverd and to spec.

Five Stars

by Steve (22 Mar 2013)
5 star review(5/5)
good

Lip Seal For Thetford Cassette Holing Tank

by Mr Hesslegrave (11 Jan 2013)
5 star review(5/5)
Exactly as it said it would do. Easy to fit by following the enclosed instruction sheet, but, as expected, a rather messy job and needed protective gloves due to the cassette tank earlier contents. Used the lubricant seal as recommended when re-assembling and that made the job so much easier

Thetford Lip Seal

by Mr Harrison (25 Oct 2012)
5 star review(5/5)
Excellent service, item well packed and delivered

Thetford Toilet Lip Seal

by Mr Kinselley (22 Aug 2012)
5 star review(5/5)
arrived before time and in perfect condition

Thetford Seal

by Paul (12 Aug 2012)
5 star review(5/5)
rexcieved in two days. Excellent

Thetford Lip Seal

by Oscar (17 Jul 2012)
5 star review(5/5)
The Thetford lip seal was exactly as described and fitted well. Thank you for your very efficient service.

Thetford Toilet Lip Seal

by Mr Woodcock (16 Jul 2012)
5 star review(5/5)
Came with easy to follow instructions. Fixed the leak that I had. What more could you ask?

Thetford Toilet Lip Seal

by trackerrob (26 Aug 2011)
5 star review(5/5)
Bought the Thetford toilet lip seal as a replacement due to heavy limescale deposits on the original. Usual high Thetford quality, coupled with excellent service from Leisureshop Direct. Easy to fit.

Lip Seal For Thetford C200, C2,C3 & C4 Toilets

by Dangles (02 Aug 2011)
5 star review(5/5)
Lip seal for Thetford C200, C2,C3 & C4 Toilets . The original is begining to look worn so this is a just-in-case spare. Looks identical to the factory fitted one so no doubt it will do the job.

Great Service

by Caravaner (19 Feb 2011)
5 star review(5/5)
Good quality, excellent service from Leisureshop, they give me great advice on the phone as well.

P Driscoll

by Caravaner (06 Jul 2010)
5 star review(5/5)
Worked well
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If you’ve changed your mind about keeping your purchase, please return it in its original condition with proof of purchase and we’ll exchange or refund it. Unless faulty, this should be within 30 days of receiving your order. By original condition, we’d expect this to mean that you’ve kept packaging and labels, and that the item is undamaged and unused.

For further information of how to return your item, please visit the "Returning an Unwanted/Faulty/Damaged Item" section on our Help Page.
  Did you know we have been established and have been in the caravan and motorhome industry for over 50 years?

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