Well water typically has more minerals than city water and will corrode your pipes and leave buildups faster.

You can also use mineral wool (sound-proofing insulation) to surround the pipes if you do end up opening the wall. 

Things that affect value here:  crop type, water-well or district, type of irrigation, utilities, tons per acre, water rights or shares, dwellings or homes, soil class (1, 2, 3, etc), mineral rights. 

@James Mcsweeney Like Jimmy mentioned, this is most likely due to a disturbance to sediments, particles or minerals in your water.

I look at mineral rights, "bug out" plots, ranching, and none of it panned out.

Purchase price: $20,800 Cash invested: $60,000 Sale price: $112,500 900 sq ft bungalow. 2 bedroom, 1 bath, 1 detached garage; built 1922; Built for the coal miners family by the Logan's Ferry Heights coal mining company.

Looking into a property where the seller wants to retain the mineral rights to the property.

Old cast iron pipes inside diameters are typically about 1/4 of the original size due to mineral/corrosive build up.

Certain natural resource rights, and both working and royalty interests in oil, gas and minerals qualify. 

Again, here are some common examples.Commercial real estateResidential real estateOil and Gas (Mineral) InterestsWater and/or Timber InterestsFarm, Ranch, or raw landSolar farmsStorage Facilitiespassive TIC interests (often in a NNN lease)Conservation easementsDM me if you have specific questions about any of these.