The Visa 18 Litre Potty features an 18 Litre (4.8 gallon) holding tank and 14 Litre (3.7 gallon) water reservoir. It is easy to flush, and the durable piston pump is two-directional for enhanced bowl surface coverage. It has quick release separation latches, level indicators for both bowl and tank, a multiple-flush water reservoir, and air vent for smooth and easy discharge.