Water supply test kit
Measures what the building actually delivers — hardness, alkalinity, TDS and residual chlorine — so that every treatment decision downstream is made against a reading instead of an assumption.
This is the first entry in the category because it is the first step in commissioning, and the rule it carries governs everything after it: filtration is specified AFTER the supply is tested, never before. Specifying from a machine manual or a supplier's default bundle instead of from a test of the actual supply is the most expensive avoidable mistake in this section — scale is cumulative, it forms invisibly, and it eventually becomes a service call rather than a clean. The instruments are simple, and the confusion is never about how they work but about what each one is actually telling you. A TDS meter reads electrical conductivity and converts it to a parts-per-million figure using an assumed factor: it tells you HOW MUCH is dissolved and nothing whatever about WHAT. A hardness test titrates calcium and magnesium against an indicator that changes colour once they are all bound, and the drop count is the reading. An alkalinity test does the same for the carbonate buffering that resists a change in pH. A chlorine test shows whether a disinfectant residual is present, which decides whether carbon has a job to do and whether the line beyond it is now unprotected. Those are four different numbers and none of them substitutes for another: a supply can sit comfortably inside the TDS band and still be hard enough to scale a boiler within a year of opening, and a soft supply can be heavily buffered and make every coffee taste flat. The second thing the test has to establish is that the supply is not a constant. Network blends change with season and source, a building's storage tank changes what arrives at the tap, and a long unused branch changes it again. One reading at commissioning is a baseline, not a specification for the life of the site.
- Test BEFORE you specify anything, and treat that as the non-negotiable step it is. Every other decision in this category — carbon, softener, inhibitor, RO, blend — is downstream of a reading, and a package specified without one is a package specified for a supply you have never met. This is the sentence that prevents the most expensive failure on the site.
- Sample at the tap the equipment will actually be plumbed to, not at the nearest sink. A building can carry a softened supply for a boiler somewhere else, an unsoftened branch for the kitchen, a storage tank that changes everything, and a long unused run that adds its own character. Two taps in one venue can genuinely need different treatment, and only sampling both reveals it.
- Measure hardness AND alkalinity AND TDS, because they drive three different decisions. Hardness decides whether you need removal, inhibition or nothing. Alkalinity decides how much of the coffee's acidity survives the cup, and whether a plain sodium softener will fix your taste problem or leave it exactly where it was. TDS decides whether the water is inside the target band at all. Reading one and calling it a water test is the most common version of this mistake.
- Test more than once before you commit. A supply that is blended seasonally, or fed from a tank that turns over slowly, gives a different answer in a different month, and a treatment sized on the softest reading of the year is a treatment that fails in the hardest.
- Decide who owns repeat testing before opening, not after the first fault. A logged reading at each cartridge change is what turns a change interval from a calendar guess into a measured decision, and it is the only thing that makes a slow drift visible while it is still cheap.
- Buy the instrument the team will actually use. A drop test that lives in a drawer and needs five quiet minutes measures nothing on a bar that never has five quiet minutes; a strip that gets used weekly beats a laboratory-grade kit that gets used never. Match the instrument to the routine you can honestly commit to.
- Where the site is fed from a stored tank, treat the tank as part of the supply and sample downstream of it. Storage changes temperature, residual disinfectant and everything that grows in the absence of one, and a treatment chain specified from the incoming main is specified from water the bar never receives.
- Send one sample to an accredited laboratory at commissioning even if you never do it again. The bar-side kit tells you about scale; the laboratory tells you about corrosion, and the two lead to opposite treatment choices. Discovering an aggressive supply after the fittings have started staining is discovering it in the most expensive possible way.
Before the layout is drawn and before anything is ordered — this entry sits first in the category because it sits first in commissioning. After opening it moves into the maintenance routine and stays there: a logged reading at every cartridge change is what turns the whole treatment chain from a set of assumptions into a system with a record. It lives with the water quality tool and the maintenance schedule, not on the bar.
- Specifying filtration from the machine manual or a supplier's standard bundle instead of from a test of the actual supply. This is the single most expensive avoidable mistake in the category and every other entry here restates it.
- Reading TDS alone and calling it a water test. It is a total, and treatment is chosen from composition.
- Sampling at a convenient sink on a different branch from the one the machine will be plumbed to.
- Accepting a utility water report as the site's water, when it describes the network and not the tap after the building's tank and pipework.
- Testing once at commissioning and treating the result as permanent, on a supply that blends seasonally.
- Keeping reagents in the heat and the light and then trusting the colour they produce.
- A sample drawn from the tap that will feed the equipment, after the building's storage and pipework rather than before them. Where the site is fed from a stored tank, the tank is part of the supply and the sample belongs downstream of it. Run the tap first so the reading is of the supply and not of the branch it sat in overnight.
- A drawer. The real constraint is not space but shelf life — reagents and strips lose accuracy past their date and a confidently read expired strip is worse than no reading at all.
- Reagents degrade in heat and light, and in a hot climate that happens faster than the packaging implies. Store them out of the sun and away from the machine's heat, and replace them on their own date rather than when the bottle empties.
- Handheld conductivity (TDS) meter
- A probe that reads the water's electrical conductivity and displays it converted to a dissolved-solids figure.
- Instant, cheap and repeatable, which makes it the right instrument for tracking DRIFT — the same tap, the same meter, logged over months, tells you when a cartridge is finished. It is the wrong instrument for specifying treatment, because it reports a total and treatment is chosen from composition.
- Hardness and alkalinity drop test
- A reagent added drop by drop to a measured sample until an indicator turns; the count is the reading.
- This is the reading that actually sizes a softener, an inhibitor or a blend. It takes a few minutes and a steady hand, and it is the single most useful thing anyone can do before ordering water treatment. Colour strips are the faster, coarser version of the same test — good enough to see a change, not always good enough to specify from.
- Accredited laboratory analysis
- A sample sent away and returned as a full ion profile, including the ions a bar-side kit cannot see.
- The only way to separate a supply that will SCALE from one that will CORRODE — chloride and sulphate do not show up on a hardness kit and they change which treatment is safe. It is the right spend once, at commissioning, and the wrong spend monthly.
- Utility or supplier water report
- A published analysis of the network supply for the area, obtained rather than measured.
- Free, and it describes the network — not your tap after the building's storage tank, its pipework and whatever else in the building is already softening a supply for something unrelated. Use it to know what to look for. Never use it as the specification.
- The first cartridge change comes due far sooner than the rated capacity suggested it would.
- Treatment sized from a manual or a supplier default rather than from a measured hardness, so the consumable is doing more work than it was chosen for.
- Money, at a rate nobody budgeted — and if the early exhaustion is not noticed, scale, which is the cumulative failure that ends as a service call.
- Water reads comfortably inside the TDS band and the boiler scales anyway.
- TDS is a total and hardness is a composition. A supply can sit in the band with calcium and magnesium well above the hardness band, and a conductivity reading cannot see the difference.
- Money and downtime, arriving months after the decision that caused them — and a team that trusts the meter will keep trusting it while the element coats.
- Two readings of the same tap, weeks apart, disagree by more than the instrument's resolution.
- A genuinely varying supply, a storage tank that has turned over, or reagents that have degraded in the heat since the first reading.
- The decision that was made on the first reading. Whichever explanation is true, a treatment specified from a single measurement of a moving supply was specified from a moment, not from the water.
- The kit has not been opened since the day the bar was commissioned.
- Repeat testing was never given an owner or a date, so it belongs to everyone and therefore to no one.
- Every water decision made after that point is a guess, and a slow drift in the supply or a spent cartridge has nothing to be measured against.