Thetford Twusch Porcelain Cassette Toilet Bowl Insert - C2/C3/C4

Upgrade your Thetford C2, C3, or C4 cassette toilet with the premium Thetford Twusch porcelain ins...

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Product Information

Full details

The Thetford Twusch porcelain insert is designed for caravan, motorhome, and campervan owners seeking to upgrade their existing C2, C3, or C4 cassette toilets. By adding a nano-sealed porcelain surface to your standard plastic bowl, this insert significantly improves hygiene and ease of cleaning, though it requires a precise installation process using sanitary silicone.

All features

Model Part Number201740
BrandThetford

Extended Product Information

FAQs

Will this add too much weight to my motorhome?

No, the insert weighs only 800g, which is negligible for almost all caravan and motorhome weight limits.

Can I use standard toilet bowl cleaners?

You should avoid harsh, abrasive cleaners or scouring pads, as these can damage the nano-sealed finish. Use mild, non-abrasive liquids.

Does this require special tools to install?

No special tools are required, though you will need a tube of sanitary silicone and a caulking gun for clean application.

Is the installation reversible?

Once the silicone is applied and cured, the insert is considered a permanent upgrade to your toilet system.

Does it fit other Thetford models like the C200 or C250?

No, this specific model is precision-engineered only for the C2, C3, and C4 series.

Why is the nano-seal important?

The nano-seal creates a hydrophobic surface that repels water and waste, making the toilet much easier to flush clean and less prone to bacteria.

Troubleshooting

Water pooling between the insert and the original bowl

This indicates an incomplete silicone seal. You must remove the insert, thoroughly clean away old silicone, and re-apply a continuous, gap-free bead.

Flush seems to be splashing more than usual

Ensure the insert is properly centered during installation; an offset placement can disrupt the natural flow of the flush water.

Pros and Cons

Pros

  • Significantly easier to clean than plastic
  • Resistant to scratches and deep stains
  • Extremely lightweight compared to full ceramic toilets
  • Reduces water consumption during use
  • Provides a more hygienic experience

Cons

  • Requires careful installation with silicone
  • Not compatible with all Thetford models
  • Installation is permanent once the silicone cures
  • Requires a curing period before first use

Setup, Compatibility & Care

The Twusch is designed exclusively for the Thetford C2, C3, and C4 cassette toilets. Installation requires a clean, dry existing bowl surface. You must apply a bead of high-quality sanitary silicone to the outer edge of the Twusch insert, carefully position it inside the existing plastic bowl, and press firmly to create a watertight seal. It is critical to ensure no gaps remain where waste could seep behind the insert. Allow the silicone to cure for the manufacturer-recommended time (typically 24 hours) before the first use. For ongoing care, clean only with a soft cloth and non-abrasive, bathroom-safe cleaning agents to maintain the integrity of the nano-coating.