Clogged KWC shower mixing valves
I have a problem with rust (I think) and other stuff clogging the screen (or is it a filter?) of my KWC shower mixing valves. See attached pictures. For the past 6 years since I installed the valves, I have had to clean them out every 3 months or so because hardly any water came out the shower head. And as of this summer, I have to clean them every 4 weeks. The picture shows one screen the way it looks after just 4 weeks, the other one is clean after I remove the gunk with a tooth brush.
My question(s): What is that stuff that collects in the screens? The brown stuff is almost slimy. I assume it's rust, but where would it come from? My house is connected to city water. Most of the pipes are copper, except for one bathroom that is unused. Landscape pipes are partially old rusted galvanized, but there is a backflow preventer that stops rusty water from flowing into the house. What is the white and the green chunky stuff? the white stuff feels greasy.
Any ideas? I'm getting tired of disassembling the valves and clean them out so frequently...
Slimy stuff in the pre-filter to my tankless hot water heater
I have a similar problem with clogging in the pre-filter to my tankless hot water heater. The problem just started a few months ago after years of problem free operation. The screen pre-filter gets clogged on a weekly basis by this brown slimy stuff. Sometime it clogs slowly and sometimes it clogs suddenly, leaving me wet in the shower with only cold water. Not fun! There is an Aqua-Pure filter (AP431) in front of the tankless pre-filter which is supposed to reduce scale. Somehow the brown slimy stuff makes it through the Aqua-Pure filter and gets stuck in the screen pre-filter. I have tried changing out the Aqua-Pure filter several times to see if that is where the brown slimy stuff is coming from, but no luck. I am on well water and there is a large paper filter between the pump and the house to clean out dirt from the pump. I change out that filter every 6 months. Any ideas where this brown slimy stuff could be coming from? I have run the water going to the tankless out to a drain for a long time to try to clear the lines, but that doesn't seem to do it. I think I may have alien life forms living in my plumbing!!!! HELP!!!!!!!!
Originally Posted by Matthias