Thetford Cassette Toilet Lip Seal (Post‑June 2000) – Part 23721, Fits C2/C3/C4/C200/C250 Models

Keep your Thetford cassette toilet leak-free with the Post‑June 2000 Lip Seal (Part 23721). Designed for models C2, C3, C4, C200, C250, C260, and C400, this durable seal maintains a tight connection between the bowl and cassette—reliable and easy to replace.

Key Features & Specifications:

• Exact OEM Fit for Newer Toilets: Replaces the large top seal on cassettes produced after 15 June 2000—including C2, C3, C4, C200, C250, C260, and C400/C402. 

• Genuine Thetford Part (P/N 23721): Also labeled as SC1234 or Thetford Code 23721; designed for seamless integration. 

• Easy DIY Replacement: Slide-in design; accessible from the top without removing video emergency components. 

• Effective Leak Prevention: Reinforces the junction between the toilet bowl and cassette tank, helping ensure clean, tight sealing.

• Long-Lasting Construction: Durable rubber compound built to withstand the rigours of regular use and travel.