If you already hold the maintenance contract, you already know which units call about scale in the water heater and the taste at the tap. You've replaced the elements, swapped the cartridges and taken the work orders — and the water that caused them is still the same water.
This guide is for the service company: an independent multifamily maintenance contractor, or a plumbing- or HVAC-led company with multifamily accounts, adding a water line for townhome, condo, small-building and in-unit point-of-entry installs on city water. It isn't about central plants on a building main; those get a different conversation, and it's below.
Where in-unit and small-building treatment fits, and where it doesn't
| Fits in-unit or small-building treatment | Needs engineering or a central-plant specialist |
|---|---|
| Townhomes with their own water entry, water heater and utility closet | One main serving many units with no per-unit shutoff or space |
| Condos and duplexes where each unit has a point-of-entry location, space, a drain and an outlet | Boilers, cooling towers and hydronic loops |
| Small buildings (a handful of units) where each unit can be treated at its own entry | High-flow service for a whole building |
| Common-area drinking water as a point-of-use amenity | Central softening or filtration ahead of a building's distribution |
Aquonyx's public line is sized for homes and units. If the job is a building main, call us before you quote — higher-capacity needs are reviewed case by case.
Owner, manager, resident: get the roles in writing
Before the first install, the service agreement with the owner should answer, in writing: who approves the work (owner or board), who pays, who owns the equipment, who handles salt and filter service, how service visits get access to units, and what happens to the equipment at move-out or sale. Residents need to know what the system is and who to call; managers need a schedule they can send notices against.
This is about your service agreement with the owner, not legal advice. The owner's counsel should review any lease language.
Test by building, confirm by unit
Read the utility's Consumer Confidence Report once per utility for the disinfectant type — chlorine vs. chloramine decides the carbon media across the whole property. Then tap-test each building (hardness, total chlorine, TDS) and spot-check units, because branch piping and water-heater age vary. Our guides to testing city water on site and reading the CCR cover the kit and the report; the municipal water treatment sequence covers the order equipment goes in.
What to offer first
| Order | Situation | Product | Sizing |
|---|---|---|---|
| 1 | Units with point-of-entry space, hardness on city water | Diamond Soft metered ion-exchange softener — smaller units often size to the 30K; confirm by sizing | Softener sizing calculator |
| 2 | Tight utility closets; hardness plus taste/odor | The Diamond — carbon and softening in one tank | Softener calculator for capacity |
| 3 | Taste/odor concerns | Black Diamond whole-home carbon — coconut-shell or catalytic media per the CCR; 1.0 / 1.5 / 2.0 ft³ | Per-unit flow (GPM) calculator |
| Amenity | Owner wants drinking water in units or common areas | Reverse osmosis, point-of-use | Per the model's documentation |
Ion-exchange softening is the standard approach to hardness; activated carbon is the media class commonly used for chlorine taste and odor, with catalytic carbon specified where a utility uses chloramine; RO is a membrane process for point-of-use drinking water. Describe the categories that way in the proposal and let the model's documentation carry the specifics.
A first property, from walk-through to service route
Sample job
One townhome community, unit by unit
The same sequence scales from six units to sixty.
0 of 7 checked
Then
The second property starts at step two — you already have the CCR.
Plan crew days and service visits
Every input starts blank. Your portfolio, your crew, your prices. This is not a projection of earnings.
Your numbers · city-water jobs
Your portfolio, your crew: plan the water line
Every input starts blank. The math is shown under the result.
Enter all 8 numbers to see your math. 0 of 8 entered.
Your numbers, not ours. This is arithmetic on the numbers you entered. It is not a projection of earnings, income or profit, and it is not a promise of results. “Installed-price total” is your price multiplied by your count. It comes before equipment, labor, financing fees, overhead and taxes, and actual results vary by market, pricing, licensing and effort.
Sizing a unit? Use the home flow-rate (GPM) calculator and the softener sizing calculator for each unit type, then carry the result across every unit of that type.
Running the service route
Batch visits by building on a fixed schedule so a tech works one address for a morning instead of crossing town. Keep a per-unit log — readings, media and filter dates, anything the resident mentioned — and coordinate access through the manager so notices go out once. Report after each round: units visited, readings, anything that needs the owner's attention. The log is what turns a one-time install into a contract line the owner renews.
HVAC-led service companies will recognize the agreement structure; plumbing-led companies will recognize the test-first field routine. The multifamily version just runs it across a roster.
The honest questions
How the Aquonyx dealer program works for multifamily service companies
- No application, enrollment or franchise fee.
- A one-pallet opening order to begin.
- Assigned wholesale pricing after approval, viewed in the dealer portal.
- Product and installation training during onboarding.
- The dealer portal for quotes, ordering, order tracking, installation scheduling and stock — including stock by unit type.
- The written dealer agreement governs territory and terms. Qualified commercial service companies can apply; higher-capacity needs are reviewed case by case.
- Written Lifetime Limited Warranty terms provided to dealers.
- Homeowner financing: on completion of the dealer application, Aquonyx introduces you to its in-house homeowner financing program.
Hold the contract? Add the water line. Apply to become a dealer — no fee, or see the systems first. Aquonyx is the manufacturer; dealers run their own businesses.
This guide covers municipal (city) water and in-unit or small-building point-of-entry equipment. It is not legal advice; the owner's counsel should review lease and service-agreement language. Equipment is described by type and specification only — the model's documentation states what each system is designed to do.
About Aquonyx. Aquonyx builds city-water treatment systems for independent dealers. You buy from the maker. Articles are written and reviewed by the Aquonyx Technical Team; see how we source and check them.