Thetford SC lip seal for cassette toilet holding tanks available for toilets produced before and after 15 June 2000.

Thetford part number: 16175 pre June 2000

The thetford lip seal is used for the holding tank C2, C3 and C4 and listed as: 9. Lipseal

Thetford part number: 23721 post June 2000

The thetford lip deal is used in the C200 holding tank listed as:18. Lipseal

The thetford lip seal can be seen in the C250 and C260 holding tank and listed as: 6. Lipseal

The thetford lip seal is used in the C400 holding tank but listed as 7. Lipseal

Again for the C500 holding tank the same lip seal is used but listed as: 7. Lipseal