Water softener installation in Phoenix

Water Treatment Phoenix is an independent referral service, not an installer, plumber or water utility. When you send the form, your details go to an independent local water treatment pro who can contact you and prepare a quote.

The permit

The City of Phoenix Planning and Development quick reference sheet (revised February 2020) lists “installing or replacing water softener” among remodeling projects that may require a permit. The sheet is from 2020, so confirm the current rule with the city or ask the installer to do so. Ask who will pull the permit and whether an inspection is part of it.

Where the softener goes

A whole-house softener sits on the main water line where it enters the house, so that the water reaching the water heater and the fixtures is already softened. The installer needs three things near that spot: the main line, a drain for the regeneration water, and room to reach the salt tank. Ask the installer to show you the exact spot before the work starts.

• The main line: the softener is cut into it, with valves so the water can be shut off to the unit.
• A bypass: a valve that sends water around the softener during service, so the house still has water.
• A drain: regeneration rinses the hardness out of the resin, and that water has to go to a drain the right way.
• Power: a powered control valve needs an outlet nearby.
• Hose bibs: some owners keep an outdoor tap on unsoftened water. Decide before the pipes are cut.

Sizing to Phoenix water

The City of Phoenix 2025 water quality report gives total hardness of 172 to 302 ppm, which it also states as 10 to 17.6 grains per gallon. On the USGS scale, hard water runs from 121 to 180 mg/L and very hard water is anything over 180. A softener has to remove every grain that comes in, so its capacity is set from your hardness and your household’s water use.

Hardness at the tap	Grains removed per 100 gallons	Grains removed per 300 gallons
10 gpg	1,000	3,000
14 gpg	1,400	4,200
17.6 gpg	1,760	5,280

Those are not product recommendations; they show why the hardness reading matters. An installer should measure the hardness at your tap, ask how many people live in the house and set the control valve to that figure. If the quote gives a capacity but no hardness reading, ask where the number came from.

Choosing the equipment

For an ion exchange softener, the standard to look for is NSF/ANSI 44, which covers residential softeners that use a regenerable cation exchange resin. The general advice applies here too: choose a unit certified by NSF, Underwriters Laboratories or the Water Quality Association for what you want to remove, and check that the certification covers that contaminant. Look the model up yourself.

1. Capacity in grains, sized to your measured hardness.
2. The control valve and how it decides when to regenerate.
3. Salt or potassium chloride, and whether the unit is set up for either.
4. The certification: NSF/ANSI 44 for an ion exchange softener.
5. The parts list: valves, bypass, drain line, fittings.

What the installer should explain

A softener only works well if you know how to look after it. Before the installer leaves, ask them to show you:

• How to put the softener in bypass and back into service.
• How to check the salt level and what to buy.
• What the control valve’s settings mean, including the hardness setting.
• How to tell that hardness has come back, and who to contact if it does.
• The maker’s upkeep schedule, kept with the unit.

Water utilities commonly note that some softening systems can increase the corrosivity of the water, which can damage the anode in a water heater. Ask the installer how the softener is set and when the water heater’s anode should be checked.

Replacing an old softener

If your home already has a softener loop or an old unit, note that replacing a softener is on the same city list of projects that may require a permit. If the old unit has been in bypass for years or the loop is unusual, ask the installer to check the connections before quoting. If you are not sure whether your softener can be saved, read softener repair and service first.

Doing it yourself

Some homeowners ask whether they can install a softener themselves. The work means cutting into the main water line, fitting valves and setting up a drain, and the City of Phoenix lists it among projects that may require a permit. Check with the city about the permit before you start, and weigh the job honestly against your plumbing experience.

Sodium and the kitchen tap

A salt-based softener adds sodium in exchange for the hardness it removes. If anyone in the house is on a sodium-restricted diet, the common advice from water utilities is to consult a physician. Some households add reverse osmosis at the kitchen sink for drinking water at the same time as the softener; if you want that, ask for both on one quote.

What affects the size of the job

This site prints no prices, because the price depends on your house and your water, and any figure here would mislead you. These are the things that change the size of a softener installation, so you can see why two quotes differ:

• The connection point: a home with an existing softener loop is a different job from one where the main line has to be opened and re-piped.
• The distance to a drain and an outlet: a longer drain line or new wiring adds work.
• The capacity: a larger unit for very hard water or a big household costs more to buy and takes more salt.
• The valve: a valve that regenerates by the water actually used is a different part from a simple timer.
• Extras on the same visit: a carbon filter ahead of the softener, reverse osmosis at the sink, or a new bypass.
• The permit: the City of Phoenix lists softener installs among projects that may require a permit, and where a permit is required, it is part of the job.

Ask each installer to list these items separately on the quote. Then you are comparing like with like, and you can see whether one quote leaves out the permit or the drain.

Questions to ask before you sign

1. What hardness did you measure at my tap, and what is the softener set to?
2. What is the model, and where can I look up its NSF/ANSI 44 certification?
3. Is a City of Phoenix permit needed, who pulls it, and is an inspection part of it?
4. Where exactly will the softener, the drain line and the bypass go?
5. Which taps will get softened water, and which will stay on hard water?
6. What upkeep does the maker’s schedule ask of me?
7. Who do I contact if hard water comes back?

Get the answers in writing. A quote that answers all seven is easy to compare with another one.

The first weeks after the install

Once the softener is running, check that the hardness is actually gone. A simple hardness test at a kitchen tap, before and after, tells you whether the setting is right. Watch the salt level in the brine tank so it does not run out. If white spots or scale come back, the hardness setting or the regeneration schedule may need to change; contact the installer before you assume the unit has failed.

Related pages

For how softeners work and how to choose one, see water softeners in Phoenix. For whole-house systems that combine softening and filtration, see whole-house water softeners. For the city’s figures in detail, read the Phoenix hard water guide.

How to ask for an installation quote

Send the form on this page with your ZIP code and what you notice. Your request goes to an independent water treatment pro in the Valley, who can contact you, measure your water and prepare a quote. Asking is free, and you are never obliged to go ahead.

Questions people ask