Our Karcher hot water pressure washer has a built in water softener. It comes in 1litre bottles and you just push an upturned bottle in the holder and it does it's thing. Being German it's quite expensive but probably meters in precise amounts to the exact requirements of the water going through the machine, or something... then fiddles the test reasults. https://cleantec.biz/6x-karcher-rm110-asf-water-softener-hds-pressure-washers.html |