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Thetford C400/C250/C200 C2/3/4 WC Cistern Gasket 23721 - Picture 1 of 1

Thetford 23721 Cassette Toilet Lip Seal

4.84323 product ratings
camperflash (2167)
97.1% positive Feedback
Price:
£32.03
+ £16.68 postage
Estimated delivery Fri, 25 Jul - Mon, 4 Aug
Returns:
14 days return. Buyer pays for return postage. If you use an eBay delivery label, it will be deducted from your refund amount.
Condition:
New
It is compatible with models from year of manufacture 06/2000 onwards, thus ensuring a simple and safe installation for your exhaust devices. Thetford C400/C250/C200 C2/3/4 Toilet Cistern Seal 23721.

About this product

Product Information

This Thetford Cassette Toilet Lip Seal has been designed to fit various popular models of recreational vehicle toilets from Thetford, including the C200 and C250, the C400, C2, C3, and C4. With a diameter of 110mm and sturdy construction, this durable cass

Product Identifiers

BrandThetford
MPN23721
EAN8710315549812
GTIN8710315549812
UPC8710315549812
ModelC2
eBay Product ID (ePID)20032581492

Product Key Features

Vehicle TypeCampervan & Caravan

Dimensions

Weight59g
Length11cm

Additional Product Features

Item Sub-TypeToilets
Sub-TypeToilets
TypeToilet Lip Seal

All listings for this product

Buy it now
New
For Thetford Toilet Lip Seal Replacement 23721 Fits C200 C250 C260 C400 Cassette
item 1 For Thetford Toilet Lip Seal Replacement 23721 Fits C200 C250 C260 C400 Cassette
£7.40
Free postage
For Thetford Toilet Lip Seal Replacement 23721 Fits C200 C250 C260 C400 Cassette
item 2 For Thetford Toilet Lip Seal Replacement 23721 Fits C200 C250 C260 C400 Cassette
£7.43
Free postage
OEM Thetford Cassette Lip Seal Part 23721 C200 C250 C260 C400 Toilet Replacement
item 3 OEM Thetford Cassette Lip Seal Part 23721 C200 C250 C260 C400 Toilet Replacement
£7.47
Free postage
OE FOR Thetford Cassette Lip Seal C250-C260-C200-C400 Toilet 23721 n Replacement
item 4 OE FOR Thetford Cassette Lip Seal C250-C260-C200-C400 Toilet 23721 n Replacement
£7.48
Free postage
OE FOR Thetford Cassette Lip Seal C250-C260-C200-C400 Toilet 23721 n Replacement
item 5 OE FOR Thetford Cassette Lip Seal C250-C260-C200-C400 Toilet 23721 n Replacement
£7.56
Free postage
For Thetford Toilet Lip Seal Replacement 23721 Fits C200 C250 C260 C400 Cassette
item 6 For Thetford Toilet Lip Seal Replacement 23721 Fits C200 C250 C260 C400 Cassette
£7.63
Free postage
For Thetford Cassette LipSeal 23721 C200/C250/C260/C400 Toilet Caravan Motorhome
item 7 For Thetford Cassette LipSeal 23721 C200/C250/C260/C400 Toilet Caravan Motorhome
£7.67
Free postage
For Thetford Cassette LipSeal 23721 C200/C250/C260/C400 Toilet Caravan Motorhome
item 8 For Thetford Cassette LipSeal 23721 C200/C250/C260/C400 Toilet Caravan Motorhome
£7.73
Free postage
OEM Thetford Cassette Lip Seal Part 23721 C200 C250 C260 C400 Toilet Replacement
item 9 OEM Thetford Cassette Lip Seal Part 23721 C200 C250 C260 C400 Toilet Replacement
£7.73
Free postage
CARAVAN AND MOTORHOME THETFORD TOILET SEAL 23721 not a copy
item 10 CARAVAN AND MOTORHOME THETFORD TOILET SEAL 23721 not a copy
£10.78
Free postage
Genuine Thetford Cassette Toilet C200 C2 C3 C4 Lip Seal 23721 **1St CLASS POST**
item 11 Genuine Thetford Cassette Toilet C200 C2 C3 C4 Lip Seal 23721 **1St CLASS POST**
£15.75
Free postage
Thetford 23721 Cassette Toilet Lip Seal C2 C3 C4 C200 C250 C260 C400 C500
item 12 Thetford 23721 Cassette Toilet Lip Seal C2 C3 C4 C200 C250 C260 C400 C500
£16.65
Free postage
Genuine Thetford Cassette Toilet C2 C3 C4 C200 Lip Seal 23721 Caravan
Almost gone
item 13 Genuine Thetford Cassette Toilet C2 C3 C4 C200 Lip Seal 23721 Caravan
£16.65
Free postage
Genuine Thetford Cassette Toilet C200 C2 C3 C4 Lip Seal 23721 POST JUNE 2000
item 14 Genuine Thetford Cassette Toilet C200 C2 C3 C4 Lip Seal 23721 POST JUNE 2000
£16.90
Free postage
Thetford Cassette Toilet Genuine C2 C3 C4 C200 Lip Seal Caravan Camping
Almost gone
item 15 Thetford Cassette Toilet Genuine C2 C3 C4 C200 Lip Seal Caravan Camping
£17.33
Free postage
Thetford Cassette Lip Seal 23721 Toilet C2 C3 C4 C200 Caravan Motorhome
item 16 Thetford Cassette Lip Seal 23721 Toilet C2 C3 C4 C200 Caravan Motorhome
£17.49
Free postage
Genuine Thetford Cassette Toilet C2 C3 C4 C200 Lip Seal 23721 1ST CLASS POST
item 17 Genuine Thetford Cassette Toilet C2 C3 C4 C200 Lip Seal 23721 1ST CLASS POST
£17.90
Free postage
THETFORD CASSETTE TOILET LIP SEAL REPLACEMENT FOR TOILETS BUILT AFTER JUNE 2006
item 18 THETFORD CASSETTE TOILET LIP SEAL REPLACEMENT FOR TOILETS BUILT AFTER JUNE 2006
£17.95
Free postage
GENUINE THETFORD REPLACEMENT LIP SEAL FOR CASSETTE TOILETS MADE SINCE JUNE 2006
item 19 GENUINE THETFORD REPLACEMENT LIP SEAL FOR CASSETTE TOILETS MADE SINCE JUNE 2006
£17.95
Free postage
Thetford CASSETTE LIP SEAL post 06/00 Part No 23721
Last one
item 20 Thetford CASSETTE LIP SEAL post 06/00 Part No 23721
£17.99
Free postage
GENUINE THETFORD TOILET CASSETTE LIP SEAL POST JUNE 2000 PART NO 23721 CARAVAN
Last one
item 21 GENUINE THETFORD TOILET CASSETTE LIP SEAL POST JUNE 2000 PART NO 23721 CARAVAN
£18.00
Free postage
Thetford Cassette Toilet Lip Seal - After 2000 - C2, C3, C4, C200 Caravan 23721
item 22 Thetford Cassette Toilet Lip Seal - After 2000 - C2, C3, C4, C200 Caravan 23721
£18.10
Free postage
Lip seal for Thetford (23721) Toilets
item 23 Lip seal for Thetford (23721) Toilets
£18.64
Free postage
THETFORD C2/3/4/200 CASSETTE CARAVAN MOTORHOME TOILET LIP SEAL AFTER 2000 23721
item 24 THETFORD C2/3/4/200 CASSETTE CARAVAN MOTORHOME TOILET LIP SEAL AFTER 2000 23721
£17.20
+ £1.50 postage
Thetford Cassette Toilet Lip Seal Aft. 2000 for Caravan Motorhome Boat
item 25 Thetford Cassette Toilet Lip Seal Aft. 2000 for Caravan Motorhome Boat
£16.85
+ £1.99 postage
Genuine Thetford Cassette Toilet C2 C3 C4 C200 Lip Seal 23721 Caravan
Almost gone
item 26 Genuine Thetford Cassette Toilet C2 C3 C4 C200 Lip Seal 23721 Caravan
£19.00
Free postage
Lip Seal Thetford cassette caravan toilet SC234 C200 C400 and C250 23721 TLS2
Last one
item 27 Lip Seal Thetford cassette caravan toilet SC234 C200 C400 and C250 23721 TLS2
£19.55
Free postage
Thetford Cassette Toilet Lip Seal Caravan or Motorhome SC234 C200 C400 C250 TLS2
Almost gone
item 28 Thetford Cassette Toilet Lip Seal Caravan or Motorhome SC234 C200 C400 C250 TLS2
£19.95
Free postage
Thetford Cassette Toilet C2 C3 C4 C200 Toilet Lip Seal After 2000 Genuine Part
item 29 Thetford Cassette Toilet C2 C3 C4 C200 Toilet Lip Seal After 2000 Genuine Part
£20.83
Free postage
THETFORD CARAVAN CASSETTE TOILET LIP SEAL POST JUNE 2000 - NEW
item 30 THETFORD CARAVAN CASSETTE TOILET LIP SEAL POST JUNE 2000 - NEW
£17.20
+ £3.85 postage
Thetford Cassette Lip Seal Caravan Motorhome Toilet SC234 C200 C400 & C250 23721
item 31 Thetford Cassette Lip Seal Caravan Motorhome Toilet SC234 C200 C400 & C250 23721
£21.39
Free postage
Thetford Lip Seal for Thetford Toilets C2 C3 C4 C200 C220 C250 C260 C400 & C500
item 32 Thetford Lip Seal for Thetford Toilets C2 C3 C4 C200 C220 C250 C260 C400 & C500
£21.50
Free postage
Thetford SC234 Lipseal
item 33 Thetford SC234 Lipseal
£22.28
Free postage
lipseal 23721 Thetford narrowboat, barge, yacht, cruiser.
item 34 lipseal 23721 Thetford narrowboat, barge, yacht, cruiser.
£18.15
+ £4.75 postage
GENUINE THETFORD TOILET WASTE TANK LIP SEAL - 23721
item 35 GENUINE THETFORD TOILET WASTE TANK LIP SEAL - 23721
£22.99
Free postage
Thetford Cassette Lip Seal fits C2 / C3 / C4 / C200 / C220 / C250 / C400 / C500
item 36 Thetford Cassette Lip Seal fits C2 / C3 / C4 / C200 / C220 / C250 / C400 / C500
£23.24
Free postage
DCC 23721 Thetford CASSETTE LIP SEAL post 06/00,Black,110 mm
item 37 DCC 23721 Thetford CASSETTE LIP SEAL post 06/00,Black,110 mm
£26.68
Free postage
Thetford Lip Seal for Thetford Toilets
item 38 Thetford Lip Seal for Thetford Toilets
£26.99
Free postage
Thetford Cassette Lip Seal 23721 Caravan Motorhome
item 39 Thetford Cassette Lip Seal 23721 Caravan Motorhome
£23.74
+ £3.45 postage
Thetford C2,3,4/C200 lip seal
item 40 Thetford C2,3,4/C200 lip seal
£24.00
+ £3.95 postage
Thetford lip seal
item 41 Thetford lip seal
£24.99
+ £3.95 postage
Thetford C400/C250/C200 C2/3/4 WC Cistern Gasket 23721
item 42 Thetford C400/C250/C200 C2/3/4 WC Cistern Gasket 23721
£32.03
+ £16.68 postage
listings for this product

Safety information

Ratings and reviews

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4.8
323 product ratings
  • 287 users rated this 5 out of 5 stars
  • 27 users rated this 4 out of 5 stars
  • 6 users rated this 3 out of 5 stars
  • 0 users rated this 2 out of 5 stars
  • 3 users rated this 1 out of 5 stars

Would recommend

Good value

Good quality

Most relevant reviews

See all 265 reviews
  • by tango5591
    27 Sep, 2023Most favourable review

    Genuine Thetford 23721 Toilet Lip Seal

    A genuine replacement 'Thetford' lip seal that is located at the top of the toilet waste tank that seals the divided part between the interior toilet and the detachable waste tank. Just ensure that the lip that the seal sits on and the recess it fits into is thoroughly clean before fitment which should provide a perfect secure seal. However, rather a difficult item to review really but after fitment of the replacement lip seal I didn't encounter any issues regarding leaks as the waste tank was tested with plain cold water first prior to fitting the waste tank back into the caravan waste tank compartment.

    Verified purchase: YesCondition: New

  • by mikwilso-67
    17 Jun, 2020Most critical review

    Good fit

    Fitted it in 2 minutes. Not sure why there was a note attached saying it was a genuine part but repackaged for ease of posting but it appeared to be in the original packaging but with I but the see-through part removed and covered in cling film ! Did the job though

    Verified purchase: YesCondition: New

  • by uk2015-henry
    16 May, 2019

    lightweight with great features

    easy to fit ,well packaged ,at a reasonable price.

    Verified purchase: YesCondition: New

  • by wsmarkinch-6
    01 Sep, 2017

    FITTING THE SEAL

    Great seal just what I needed and so easy to fit....You can follow the instructions given with the seal...Or you can do it the easy way and cover the seal in Vaseline and pull out the old seal and fit the new one without any dismantling.......The seal is so flexible , anybody can do it EASY..... It fits perfect and sorts the leak JUST PERFECT.....

    Verified purchase: YesCondition: New

  • by erniebamford
    21 Jun, 2025

    Quality item..had a "fits thetford casse...

    Quality item..had a "fits thetford cassett" but it didn't so went for the genuine item.

    Verified purchase: YesCondition: New

  • by AwYPW_2ZQUW@Deleted
    15 Jun, 2016

    Thetford toilet parts

    Good quality genuine replacement seal for you're thetford toilet, to stop any nasty little drips as you go to empty the contents, easy to read instructions, don't take the chance on a non genuine part, it's not the sort of job you'd like to do frequently .

    Verified purchase: YesCondition: New

  • by fishnettrout
    05 Aug, 2020

    a must do part easy fitted

    exactly the correct part genuine

    Verified purchase: YesCondition: New

  • by markvwardat14
    25 Sep, 2020

    Easy install and Reduced leaks.

    A good product that is easy to install and has significantly improved the leak situation whilst prolonging the life of our cassette toilet.

    Verified purchase: YesCondition: New

  • by swat3016
    23 Jan, 2020

    Perfect

    Genuine part, fitted and works great.

    Verified purchase: YesCondition: New

  • by aidan.macnamara
    09 Jun, 2021

    Fits perfectly and comes with easy to follow instructions

    Fits perfectly and I could visibly see that it was making a better fit than the old one that was in the cassette. Was easy to follow the instructions that came with and quick to fit it.

    Verified purchase: YesCondition: New

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