Every couple of years I note minor clogs in the sink aerators. Mostly the kitchen. The faucet is 6 years old, Delta, high end type. House pipes are all copper. Just added a new water softener. Hardness was 7 grains. Now it is zero. I have noted that the aerator is clogging up almost daily. A close up is included here. I tried to see if vinegar would make the fizz. No fizzing and they appear to float. I drained the electric water heater about 20 gallons. A little brown sludge at first then perfectly clean using a 12 ounce clear water glass. I do the water heaters every year. There is a large cold water particle filter under the sink that gets changed every 6 months. I do notice more clogging by using only hot water but there is also clogging using cold but not as much. [img]https://cimg1.ibsrv.net/gimg/www.doityourselft.com-vbulletin/2000x1504/a06df68c_1fb8_4cb4_a05d_3cfb6a90da8b_cc53fd85efaef0a9917b0256689960daf2d4e299.jpeg[/img] Any ideas?

So we had remodled our ensuite a few years ago, and decided to reconfigure at that time as well as go from 1 sink to 2. Due to the reconfiguration I knew I wasnt going to be able to use the existing stack for venting and was pretty sure that tapping into the bathtub venting wouldnt work as it would be too far away.. sure enough it was.. and we would get air lock in both sinks but they would eventually drain just at about a 20% rate from before. So Ive gone ahead and installed an AAV to resolve this and the right hand sink drains with no issue now but the left hand sink wont drain at all now.. Both sinks have independant p traps.. Im not sure why it wont drain with the AAV and why it wont even drain like it did before (just slowly) any thoughts? Did I need to install the AAV closer? [img]https://cimg0.ibsrv.net/gimg/www.doityourselft.com-vbulletin/1280x960/thumbnail_20210326_140139_60ee9b2ef4a6466c9945577f5caa5c48c851e313.jpg[/img]