I just recently had to replace the recirculating pump on my house. When I
took off the old one, I noticed what I consider to be a significant amount
of scale build-up in the housing. I was surprised by this. The house is
only 4 ears old. Is this because of the hot water and the slow flow in the
lines? Is this likely developing in all of my lines. Do I need to think
about a softener. I was surprised because I am on city water as is everyone
around here and I know of nobody with a water softener. Any help would be
Hard water can cause scale to build up in plumbing, water heaters and
water using appliances; especially when that hard water is heated.
Recirculating hot water has this problem more than hot water lines
without the recirculation. Recirculation also causes erosion wear in
copper tubing if the velocity of the water is too high. That is becoming
a major problem around the US.
You need a water analysis and if your water has more than 3-4 gpg of
hardness, you need a water softener. Since you're on 'city' water, the
material you found may not be hard water scale. Most water companies add
chemicals to their water and since most are now using well water their
water is harder than what it probably was before the change from surface
water. Many people on city water won't pay money to improve their water
simply because they are paying for the water and mistakenly believe it
shouldn't have a problem that costs them more money.
Quality Water Associates
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