we had new plumbing in showers, bath etc about a month ago. we put in all new bath fixtures. one month later we heard like a water gurlge in bathroom. We had no water pressure so now we are taking toilets apart, all screens from faucets and cleaning calcium, lime and black sediment that is coming thru the copper lines After the filter. We have city water. seems to be mainly in the bathrooms where the main work was done. Is there anything that can be put in the Prefilter to dissolve the sediments so it does not continue to block the faucets screens and toilets flush valves.