What water supply does a Koine 4 need, and how do I prime its water pump?

The water mains must supply at least 20 l/min (about 5.3 gal/min). If they cannot, use a clean-water tank of about 200 litres kept full, feeding the machine's self-priming pump through a hose of at least 3/4 in, no longer than 3 m, ideally with a foot filter and not kinked. The first time you connect the pump to the tank, and again after draining the circuit or a long layoff, fill the intake line by hand to prime it. At start-up the water gauge should read at least 3.5 bar (about 51 psi), and it should not drop below 2.5 bar (about 36 psi) while running; if it does, switch on the water pump.