Keeping the water pure

We have been using water fed poles for cleaning the windows of our clients for a while now and this requires the use of Pure water which we pass Tap or rain water through a DI unit

After a while the resin that Purify the water is no longer doing its job and needs replacing,The Blue tank is the DI unit and the bag contains the new resin,after removing the old resin I replace it with new resin (Tulsion 115) and add a glass of water before insert the riser (the long screw with the Hozelock connecters) and twist it in and screw back tight.All ready to make more Pure water ;)