Where the hardness comes from
The City of Fullerton's water utility supplies a blend of local groundwater and imported water. Both carry dissolved calcium and magnesium, the minerals that make water hard. They are not a health concern at typical levels, but they leave scale wherever water is heated or evaporates.
In a newer home that means crusted aerators, spotty glass shower doors, toilets that need parts sooner, and scale inside tank and tankless water heaters. The city publishes an annual water quality report; check it for current hardness figures before choosing treatment.
Softener or scale-reduction system
Ion-exchange softener
- Removes hardness minerals from the water
- Uses salt or a substitute and regenerates periodically
- Needs space, a drain and an electrical outlet
- Changes how water feels; some people keep a separate unsoftened tap for drinking
- Ask about any local rules on discharge before installing
Scale-reduction or conditioning system
- Changes how minerals behave instead of removing them
- Often no salt and less water use
- Results vary by product and water
- Ask whether your water heater maker accepts it for warranty purposes
Other treatments and what they do
| Treatment | Targets | Does not do |
|---|---|---|
| Sediment filter | Sand and particles | Remove hardness |
| Carbon filter | Taste and odor, including chlorine-type disinfectants | Remove hardness |
| Under-sink reverse osmosis | Many dissolved solids at one tap | Treat the whole house |
| Tankless inlet filter | Debris entering the heater | Prevent scale |
Before you install anything
Questions to ask
- What problem is this system meant to solve in my house?
- Is it compatible with my water heater's warranty requirements?
- Will it include a bypass valve so it can be serviced without shutting off the house?
- What does upkeep involve, and how often?
- Is a permit needed for the installation?
Common questions
Is hard water unsafe to drink?
Hardness minerals are generally not considered a health risk. The city's water quality report covers what is in your water.
Will a softener stop tankless scaling?
It greatly reduces the minerals that cause scale. Follow the heater maker's guidance on treated water and keep up any required maintenance.
Do I need treatment at all?
No. Many homes manage with regular cleaning and water heater flushing. Treatment is a choice about convenience and equipment life.
General information for Amerige Heights, not a quote or professional advice. In an emergency, call 911.