I am new to this pole system
, i have been cleaning trad for nearly 5 years and have just got a second hand trolley system, the filters that came with the system had just been replaced by the last cleaner and when i first started using frday before last it was cleaning the water to 9ppm but now its up to 36ppm is this still ok?? it has a red pipe that takes the dirty water away and attached to this is a tap he did tell me something about flushing the filters but cant remember what he said! any help would be appreciated as i dont want to start cleaning windows with dirty water
Thanks for your time,
Richard