Thetford have released the new style C2 Waste Cassette. This Cassette supersedes the earlier Model Number T21401-74 and it is a straight swap. The dimensions have remained the same with Thetford incorporating wheels and pull handle into the design.
These tanks are exactly the same for left and right hand Thetford C2* toilets (post October 2001) - The spout and vent may need to be reversed for your toilet.
Suits Older Thetford Bench Toilets C2, C3 and C4
Tank measures 670mm x 260mm x 190mm high
Bright yellow dump cap and trim (Yellow also used for C200 which is a different tank)