The short answer
Whole-home (point-of-entry) water filtration treats water where the main line enters your house, so every faucet, shower, and appliance gets cleaner water. Systems are matched to your water's specific issues — chlorine taste, sediment, hardness, or contaminants.
What does whole-home filtration actually do?
A point-of-entry system installs on the main water line, so it treats all the water in the home rather than a single tap. Depending on the configuration, it can reduce chlorine taste and odor, trap sediment, and address specific contaminants, while some systems also condition or soften hard water.
It is different from a pitcher or under-sink filter, which only treats one point of use. It is also distinct from a water softener, which specifically targets hardness minerals — though some whole-home systems combine functions.
When is it worth installing?
Homeowners usually consider whole-home filtration when they notice:
- A chlorine smell or taste at every tap
- Sediment, cloudiness, or staining
- Dry skin and hair, or spots on glassware (often a hardness issue)
- Scale building up in fixtures, the water heater, or a tankless unit
- A desire for consistent, better-tasting water throughout the house
What does it protect, and what's the trade-off?
Beyond better-tasting water, treating hardness and sediment protects your plumbing and appliances — scale shortens the life of water heaters (especially tankless) and clogs fixtures. The trade-off is up-front cost and periodic maintenance: filters and media need servicing on a schedule to keep working.
Match the system to your water
The right system depends on what is actually in your water and your household's usage. A licensed plumber should assess your water before recommending equipment — the goal is to solve your real issue, not oversell.
Who should install and size it?
Whole-home systems tie into your main line and must be installed to code, with proper bypass and, where applicable, drain and backflow considerations. Head's Plumbing is a HALO Certified partner and installs and services whole-home filtration across metro Atlanta — sized to your home and your water.
A filter reduces things like chlorine, sediment, and certain contaminants for taste, odor, and clarity. A softener specifically removes hardness minerals (calcium and magnesium) that cause scale and spotting. Some whole-home systems do both.
Yes. Filters, cartridges, or media need periodic service depending on the system and your water. We set you up with the right service schedule so the system keeps performing.
Reducing hardness and sediment cuts down the scale that builds up in a tankless heat exchanger, which helps efficiency and lifespan. Even with treatment, tankless units still benefit from periodic descaling.
Terms in this guide
- Descaling
- Flushing mineral scale (mostly calcium and magnesium from hard water) out of a tankless water heater or pipes. Tankless units especially need periodic descaling to keep their heat exchanger efficient and under warranty.
- Tankless water heater
- A water heater that heats water on demand as it flows through the unit, instead of storing it in a tank. It saves space and avoids standby heat loss, but needs correct sizing and periodic descaling.