OEM replacement or spare cassette waste holding tank for Thetford C223S, C223CS, and C224CW toilets. 4.75-gallon capacity, built-in wheels, retractable tow handle, no-splash pour-out spout. 18-7/8" x 10-5/8" x 10-1/4". Gray/Blue. Previously known as Thetford part number 20097706.
The Thetford 50046 is the OEM replacement cassette waste holding tank for Thetford C220 series cassette toilets — specifically the C223S, C223CS, and C224CW models. Previously known as Thetford part number 20097706, this is the same direct-fit OEM tank under an updated part number.
The cassette slides out through the exterior service door for transport to a dump station or toilet, where the retractable handle extends for comfortable rolling on the built-in wheels. The no-splash pour-out spout keeps emptying clean and controlled. The 4.75-gallon capacity is the standard tank for these C220 series models. Owners often purchase a second tank as a spare — swapping a full tank for an empty one mid-trip without waiting to find a dump station. Gray and blue construction.
• 1x Thetford 50046 cassette holding tank C223-CS toilet (complete unit): • 50045 / 200866SP — Complete Thetford C223-CS cassette toilet Related C220 series parts: • 2379180 — Gravity fill door assembly for C224 toilets • 050-935 — Small plastic shower tray for C223/C224
A second tank is a practical upgrade for longer trips: 1. When the in-use tank is full, slide it out through the exterior service door 2. Slide the empty spare tank in — the toilet is immediately ready to use again 3. Extend the retractable handle, wheel the full tank to a dump station or household toilet, and empty using the pour-out spout 4. Rinse, treat with Aqua Kem, and the emptied tank becomes the new spare Note: When rolling, use the retractable handle only enough to access the fixed handle — do not use the retractable handle alone to support the full weight of a loaded tank.
The 50046/20097706 fits C223S, C223CS, and C224CW toilets only. It is not compatible with C400 series cassette toilets (C402C, C403L), which use a different, larger tank (see 3232606 left-hand or 3232706 right-hand for C400 series). Confirm your toilet model number before ordering.