Click to expand Tap to zoom Thetford Tank Cleaner 1 Ltr Save Liquid error (product-badge line 32): -Infinity% £17.99 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart Specially developed cleaning agent for wastewater tanks of cassette taps. Also suitable for the Porta Potti Fäkaltank. Cleans gently settling deposits. 1L