The Seaflo Deluxe 20L portable cassette toilet adds a waste level indicator and an air release button to the standard 20L model — so you know when it needs emptying and can release pressure before opening the valve. Built for extended overland trips where this kind of detail matters.
Specifications

Waste tank capacity: 20 litres (5.3 gallons)
Flush tank capacity: 13 litres (3.4 gallons)
Seat height: approx. 403mm
Waste level indicator: yes
Air release button: yes
Slide valve: yes (odour seal)
Pour spout: 270° rotating
Model: SFPT-20-02
Warranty: 4 years (UK authorised supply)

Supplied by E.P. Barrus Ltd, the exclusive UK Seaflo distributor.