POE vs POU
Point-of-entry treats the whole house. Point-of-use (POU), like an under-sink RO, treats one tap. Many homes are best served by one of each.
For plumbers and service techs
Whole House Water Filter Training for Plumbers
Homeowners search for whole house water filters by the thousands. Most of them never meet a plumber who can tell them what their water needs before a system gets sold to them.
Whole house filter training exists to close that gap: the water science, the sizing, and the honest answer about what a filter can and cannot do.
Short answer
What Whole House Filter Training Should Teach a Plumber
A whole house filter is point-of-entry (POE) treatment: it treats every drop that enters the home. Training should cover what each media actually reduces, how to size by flow so the house does not lose pressure, how filters and softeners work together, and how to back every claim with a certification.
What the media does
Sediment media catches particles. Carbon reduces chlorine taste and odor. Chloramine is harder to remove, so the carbon has to be chosen for it and given enough contact time. No single cartridge does everything.
Proof, not labels
"Filters contaminants" on a box means nothing. A certification to a specific NSF/ANSI standard for a specific contaminant means that product was tested for it.
The details
What Separates a Good Install From a Callback
Size by flow, not by the box
A whole house system has to carry the home's busiest moment: showers, laundry and the kitchen at once. Undersize it and the homeowner calls about pressure, not water quality.
Order the equipment
Sediment filter placement depends on the system: some go ahead of the media to protect it, and some manufacturers require one after the tank. Carbon is commonly placed ahead of a softener because chlorine and chloramine wear down softener resin over time. Follow the manufacturer's layout.
Test first on a well
Well water can carry iron, manganese, hydrogen sulfide or bacteria, and each one changes the equipment. On a well, recommend nothing until the water has been tested.
Plan the maintenance
Media gets used up. Cartridges get changed. The homeowner should leave knowing the schedule, and your company should be the one on the calendar.
Bypass and access
A bypass keeps the house in water during service. Leave room to change media without taking the wall apart.
The question homeowners ask most
Whole House Water Filter vs Water Softener
They solve different problems, and most homeowners have been told they are the same thing.
| Whole house filter | Water softener | |
|---|---|---|
| Main job | Reduces what you can taste, smell or would rather not drink, depending on the media | Removes hardness: calcium and magnesium |
| The complaint it answers | Chlorine taste and smell, sediment, specific contaminants the product is certified for | Scale, spots, film, soap that will not lather, short water heater life |
| Upkeep | Media or cartridge replacement | Salt, and periodic service |
| Often installed together? | Yes. Where the water is hard and chlorinated, many homes end up with both. | |
The fastest way to lose a homeowner's trust is to sell a softener for a taste problem or a filter for a scale problem. Read the water first. Our guide to what NSF certifications mean covers the proof side.
Your options
Where Plumbers Get Whole House Filter Training
| Option | Format | What it is built for | Cost as listed |
|---|---|---|---|
| WQA Installer Training Course | Live online, about 2 hours a week for roughly 21 weeks | Safe, code-compliant installation of softeners, filters, disinfection and RO. Prepares you for WQA's Certified Installer exam. | $1,339 to $1,859 for WQA members, $2,659 for non-members, CI exam included |
| TWQA Basic Water Conditioning (Texas) | 6 contact hours, online by WebEx or in person | A TCEQ-approved version of the Basic Water Conditioning course that Class II and Class III Texas Water Treatment Specialist licenses require | $150 members, $300 non-members (early registration) |
| Manufacturer training | Varies. North Star, for example, runs residential training for plumbers by request, plus on-demand videos | That brand's equipment, sizing and warranty | Varies by manufacturer, often tied to becoming a dealer |
| HALO Water Tour | Three consecutive days, in person, twenty seats | Water science, HALO product knowledge and selling water treatment in the home. A certification exam every day. Nothing is installed in class. | $5,000 per seat, team pricing from three seats |
Prices are what each organization listed in September 2026. Check the source before you enroll.
The HALO Water Tour covers the HALO whole house line, including the HALO 5, H2 Zero Ultimate, Hybrid and H2 Zero Carbon, alongside the Ultra Plus RO and CK10. It covers which home needs which system and how to present each one. A unit is in the room to see and touch, and nothing is installed. The curriculum page has the full breakdown.
Questions
Whole House Filter Training Questions
What does a whole house water filter remove?
It depends on the media. Sediment media catches particles. Carbon reduces chlorine taste and odor, and chloramine takes carbon chosen for it with enough contact time. For anything health-related, look for a certification to the specific NSF/ANSI standard for that specific contaminant.
Should the whole house filter go before or after the softener?
Follow the manufacturer's layout first. Sediment filters go before the media on some systems and after the tank on others. Carbon is commonly installed ahead of a softener because chlorine and chloramine degrade softener resin over time. Follow the manufacturer's instructions for the specific equipment.
Is a whole house water filter good for well water?
It can be, but only after a water test. Well water can carry iron, manganese, hydrogen sulfide or bacteria, and each calls for different equipment. Recommending a filter for a well without testing is guessing.
Do I need a license to install a whole house water filter?
It depends on the state. In Texas, licensed plumbers are exempt from TCEQ's Water Treatment Specialist license, and non-plumbers who install under contract need that license. In California, look at CSLB's C-55 Water Conditioning and C-36 Plumbing classifications. Check your own state board.
How long does whole house filter training take?
It ranges from a few hours of manufacturer or association coursework, to WQA's roughly 21-week live online installer course, to the HALO Water Tour's three consecutive days.
Sources
Where These Facts Come From
Checked in September 2026. Rules and prices change, so confirm with the source before you rely on them.
- TCEQ Water Treatment Specialist license
- CSLB licensing classifications
- WQA Installer Training Course
- TWQA training courses
- TWQA training rates
- North Star residential training request
- North Star College
Written by Roger Wakefield, Texas Master Plumber
45 years in the trade and LEED AP. Published . More about Roger
Keep going
Related Guides
Water softener training
Hardness, sizing inputs and the install details that cause callbacks.
What NSF certifications mean
Which number on the seal is a removal claim and which is not.
Certifications compared
WQA, TWQA and HALO side by side, with costs.
Add water treatment to your company
The steps, the mistakes, and the math.
Know what the water needs before you quote it
Three consecutive days, in person, twenty seats a city: Carlsbad October 27-29 and Dallas November 3-5, 2026. A certification exam closes every day, and the HALO Certified Water Quality Expert credential is awarded on day three.