Plumbing service guide

Water Softeners & Filtration

Water treatment in a home includes water softeners, which remove hardness minerals, and filtration systems, which reduce specific contaminants, sediment, chlorine or odors.

Chrome gooseneck faucet over a double kitchen sink
Quick answerSofteners and filters solve different problems. A softener exchanges calcium and magnesium for sodium or potassium to prevent scale. A filter targets particular substances. Choosing the right system starts with knowing what is in your water, from a utility water quality report (Consumer Confidence Report) or a lab test for private wells.

What this service solves

  • Scale on fixtures and in water heaters
  • Spotty dishes and stiff laundry
  • Chlorine taste and odor
  • Sediment
  • Iron staining (with appropriate systems)
Hands operating a single-handle kitchen faucet
Stock photo: naipo.de / Unsplash

Common symptoms

  • White crust on faucets and shower heads
  • Short water heater life
  • Soap that will not lather
  • Off tastes or odors
  • Orange or brown staining

Most likely causes

Hard water

Groundwater passing through limestone and other minerals picks up calcium and magnesium.

Disinfection byproducts

Chlorine and chloramine are used by utilities to disinfect water and can affect taste.

Well water

Private wells may contain iron, manganese, sediment or other substances and are the owner's responsibility to test.

How the problem is diagnosed

  1. Read the utility water quality report
  2. Test hardness in grains per gallon
  3. Lab-test well water
  4. Measure household flow needs

Repair and replacement options

Repair and replacement options
OptionBest forWhat to know
Ion-exchange water softenerHard water scaleRequires salt and a drain for regeneration.
Whole-house filtrationChlorine, sediment, taste and odorCarbon and sediment stages are common.
Point-of-use filtrationDrinking waterUnder-sink carbon or reverse osmosis systems.

What a plumber normally does

  1. Test water
  2. Size system for hardness and flow
  3. Install with bypass valve and drain
  4. Program and test

Emergency warning signs

  • Softener leaking or brine tank overflowing

If you see any of these, shut off water first. See emergency plumbing steps.

What affects the cost

We don’t publish national price figures because real quotes vary too much by region, access and the condition of your system. These are the factors that move the price:

  • System type and capacity
  • Bypass and loop availability
  • Drain location
  • Pre-filtration needs

Ask for a written quote that names the method, materials and any permit or restoration work before work begins.

DIY vs. calling a professional

Reasonable for homeowners

  • Adding salt
  • Replacing cartridge filters
  • Testing hardness with strips

Call a professional for

  • Installing the system and bypass
  • Plumbing loops and drains

Prevention and maintenance

  • Change filters on schedule
  • Keep salt above the water line
  • Clean brine tanks periodically

Specific water softeners & filtration services

Water Softeners & Filtration: common questions

Do I need a water softener?

If your water is hard enough to cause scale on fixtures, shorten appliance life or leave spots, a softener can help. Test hardness first; many utilities publish it.

What is the difference between a water softener and a filter?

A softener removes hardness minerals that cause scale. A filter reduces specific contaminants such as chlorine or sediment. Many homes use both.

Does a water softener make water salty?

Softened water contains added sodium proportional to the hardness removed. People on sodium-restricted diets can use potassium chloride or keep an unsoftened tap for drinking.

How do I know what is in my water?

Public water systems publish an annual Consumer Confidence Report. Private well owners should have water lab-tested.

Water Softeners & Filtration in specific cities

Local conditions change how this problem shows up. These city guides cover local factors in depth:

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