Where water treatment companies buy
Water treatment companies buy systems from the brands they deal for, fittings from plumbing supply, and test kits from the makers.
| Supplier | Type | What their own site says | Pro program |
|---|---|---|---|
| Hach | Manufacturer store | Water analysis since 1933, with test kits and meters sold direct and prices listed on its site. | Ask at the counter |
| Hajoca | Distributor | Wholesale plumbing supplies, sold under more than 60 local trade names. | Ask at the counter |
| Winsupply | Distributor | A network of local supply companies for residential and industrial supplies. | Ask at the counter |
| The Home Depot | Retailer | Calls itself the world's largest home improvement retailer, with more than 2,300 stores across North America. | Pro Xtra |
From each supplier's own site on the date in the sources; call your branch before you plan around it.
Your counter list
The items water treatment companies buy every week, from the van stock on our tools list. Ask each supplier for a price on these first; they decide which account saves you the most.
| Item | Why it is on the list |
|---|---|
| Softener salt and cleaner | Service visits and refills |
| Filter cartridges in common sizes | Swapping filters on the same visit |
| Bypass valves and fittings | Installs and repairs |
| RO membranes and faucet parts | Reverse osmosis service |
| O-rings and lubricant | The most common leak fix |
| Test strips and reagents | Testing on every visit |
For the first order, price the starter kit too: total hardness test kit; water test strips or a multi-parameter kit; tds meter; pipe cutters for copper and pex; pex crimp or expansion tool; adjustable wrenches and pipe wrenches; cordless drill and driver; hand truck with straps; buckets and a wet vacuum. Bigger purchases to price at a dealer or rental house: well pump and pressure test gauges; soldering kit and torch; chlorinator and shock kit for wells; tablet for water test reports; trailer or racks for tanks.
Opening a trade account
Bring your business name, tax ID and license number, and a credit application if you want terms. The big-box programs are compared row by row on Home Depot Pro vs Lowe's Pro. For the tools themselves, the water treatment tools list has prices read on the makers' own sites (Hach).
When supplier prices change
Update your water treatment price list the same week a supplier raises prices. In Koira, that price list is what your estimates are built from.
Sources
- Hach: About us, checked October 9, 2026
- Hajoca: About us, checked October 9, 2026
- Winsupply: About us, checked October 9, 2026
- The Home Depot: About, checked October 9, 2026
Last checked October 9, 2026. This page is general information, not legal or tax advice. Rules change and differ by state and city, so confirm with the agency named before you act.