we are on municipal water. The builder came over on Wednesday, saw all the stuff caught in my kitchen and showerhead filters and called the builders plumbers to come and look at what he thought was particle board from the counter tops. The builders plumber came over the other day and said he didn't know what it was that was in my filters of the kitchen faucet and my shower head upstairs. It looks a lot like particle board from the counter tops, but he said he didn't think that this was the case. I figure he wants to protect the builder at all costs. He said he thought it had something to do with the tankless water heater that we run on in our house. He said he thinks these tankless heaters may cause the systems to need to be flushed more often. He said he will call the manufacturer on Monday to see if there is similar problems like this and if so what to do about it?
Any advice on what I should do?