9 Litre Urinal Auto Cistern Header Tank (2 Gallons) Cistern to Urinal Ratio. 1-2 Bowls = 4.5ltr Cistern Header Tank. 3 Bowls = 9.0ltr Cistern Header Tank. 4-5 Bowls = 13.6ltr Cistern Header Tank Sparge pipes & Brackets are available seperately Also Exposed Urinals with Waste & Spreader in 40, 50 & 60cm sizes