Signs of Hard Water and How It Affects Your Plumbing

A homeowner guide from Drain Edge Rooter, a licensed plumbing company in Rialto, CA (C-36 #1078977). Open 24/7, call anytime: (909) 927-3194.

Hard water contains dissolved minerals, mainly calcium and magnesium. Much of the Inland Empire's water supply is considered hard. Hard water is safe to drink, but over time the minerals leave scale inside fixtures, appliances and water heaters.

Common signs of hard water

White or chalky crust on faucets, showerheads and glass shower doors.
Spots on dishes and glasses after the dishwasher.
Soap and shampoo that do not lather well.
Showerheads with clogged or uneven spray.
Popping or rumbling sounds from the water heater.
Dry skin or stiff laundry.

How to confirm it

Your water provider publishes an annual water quality report that lists hardness. You can also buy an inexpensive hardness test kit, or ask a plumber or water treatment professional to test it.

What hard water does to plumbing

Water heaters: sediment settles at the bottom of the tank, which can reduce efficiency and capacity and cause noise. Tankless units can scale up inside the heat exchanger.
Faucets and valves: scale wears cartridges and washers, leading to drips and stiff handles.
Toilets: mineral buildup affects fill valves and flappers, which can cause running toilets.
Showerheads and aerators: holes clog and flow drops.
Appliances: dishwashers, washers and ice makers can be affected by scale.

Practical steps you can take

Clean aerators and showerheads. Unscrew them and soak in white vinegar to dissolve scale, then rinse and reinstall.
Flush your tank water heater as the manufacturer recommends. See our water heater flush guide.
Descale tankless heaters regularly.
Replace worn flappers and fill valves when a toilet starts running.
Consider water treatment. Options include water softeners and other conditioning systems. Each has trade-offs, so compare them for your home and household.

Hard water and older pipes

Older homes may have galvanized steel supply pipes, which can build up rust and scale inside and slowly lose water pressure. If you have low pressure at several fixtures and an older home, ask a plumber to check the supply piping. Repiping may be the long-term fix.

A simple hard water maintenance routine

Every few months, soak aerators and showerheads in vinegar.
Wipe faucets and glass doors dry after use to limit spotting.
Check toilets for running water and replace flappers as needed.
Flush the tank water heater or descale the tankless unit per the manufacturer.
Clean the dishwasher filter and run a cleaning cycle.
Check the washing machine inlet screens for mineral debris.

A routine like this will not change your water, but it keeps scale from building up in the places where it causes the most trouble.

Water softener or not?

A traditional water softener removes hardness minerals using an ion exchange process. It can reduce scale on fixtures and inside water heaters, but it needs space, a drain, an electrical outlet, periodic salt, and regular maintenance. Some households prefer to keep an unsoftened line for drinking water or outdoor use. Other conditioning systems work differently and may not remove minerals at all.

Before buying any system, get your water tested, check any local rules about softener discharge, and ask how the system will be maintained. A plumber can install the plumbing connections and bypass valve so you can service the system without shutting off water to the whole house.

When to call a pro

Call a plumber if you have low pressure throughout the house, a water heater that is noisy or not keeping up, leaks at fixtures, or a running toilet you cannot fix. Drain Edge Rooter is open 24/7, so call anytime at (909) 927-3194.

Related services and areas

Related services: Water Heater Service, Faucet Repair, Repiping. We serve the whole Inland Empire, including plumber in Rialto, plumber in Ontario, plumber in Upland, plumber in Grand Terrace. See all homeowner plumbing guides.