Brought my van out after a short winter lay-up this year and went down to chester cc site----water tasted plasticy----after I got home I flushed the system out thouroughly using milton---I kept the van at the house for a few days, just to periodically check the water and it was fine after that--went up to Coniston CC site a few weeks later, same thing again, Plasticy----started using bottled water----came home flushed the system again, then went abroad for 4 weeks, water was fine. I drained the system before travelling home.---Went up to coniston cc site a few weeks later, first cup of tea from the kettle---plastic!!----now here we are renewing pipework, flushing systems, and maybe not looking for the simple---I check with lad in the next van and he concurred about the water. My next move is to contact North West Water regarding what treatments they are using, but for the moment we will be using bottled water-----I repeated the tests at home again and for a week the water was fine, ---