Merit W4000 Water Still-The Merit Water Still combines economy, high performance and a host of features in a way that comparable stills cannot match. Up to 4 litres/hour of distilled water are produced from the horizontal borosilicate glass boiler fitted with a 3kW long life chromium plated heater. Can be either bench or wall mounted. Easily cleaned without dismantling. NB: No 13 amp plug supplied, needs hardwire connection direct to electricity system.