Refill for Water Purity Kit

Quick Answer: The Refill for Water Purity Kit is a water test kit refill: a pack of replacement reagents, shown in the listing photograph as rows of small bottles with coloured caps and an instruction leaflet, used to restock the Water Purity Kit case once its reagents run low or pass their expiry date.

Why Reagents Need Replacing

The case, vials, syringes and colour charts of a water testing kit last for years, but the reagents are used up with every test and many lose strength over time, especially once opened. An expired or contaminated reagent gives weak or wrong colours, so a fresh set restores the kit’s reliability without replacing the whole case.

Refill packs are made for a particular kit, because reagents from different makers are designed for different sample volumes, reaction times and colour scales. Using one system’s reagents with another system’s colour chart gives misleading results. Match the refill to the kit it is going into, and keep the instruction leaflet with the case, since the order of adding reagents matters.

Which reagents are included, and in what quantity, is not given in the listing; mention the parameters you use most, since some tests run out faster than others. The refill is intended for the Water Purity Kit.

When to Order a Refill

• At the start of a school year, before the fieldwork season.
• When a frequently used test, such as nitrate or pH, is running low.
• When reagents have passed the expiry date printed on the label.
• When tests on a known standard give colours that no longer match.

Specifications

Storing and Handling Reagents

• Write the date of opening on each bottle and keep the caps tightly closed.
• Store in a cool, dark cupboard away from acids, alkalis and food; heat and light shorten reagent life.
• Keep each reagent’s safety data sheet with the kit, and wear eye protection when using them.
• Dispose of expired reagents as their safety data sheets direct rather than down the sink.

Why Choose LabEquip

Schools that already own the Water Purity Kit order refills each year to keep fieldwork running. LabEquip lists the refill in General Lab Products, and the reagents you need can be agreed through the contact page.

Frequently Asked Questions

Can I use this refill in a different make of water kit?

It is not advisable. Reagents are matched to a kit’s sample volumes, waiting times and colour charts, so reagents from another system can give colours that do not match the chart.

How do I know when reagents have gone off?

Check the expiry date on each bottle. A test on distilled water that shows colour, or a test on a known standard that reads wrongly, also suggests the reagent has deteriorated or been contaminated.

How should reagents be stored between fieldwork seasons?

Keep them tightly capped in a cool, dark cupboard, upright and away from other chemicals and food. Warm or sunny storage shortens their life.

Do I need to replace every reagent at once?

Not always. Some tests are used far more often than others and run out sooner. Replacing all reagents together is simpler, though, because it keeps every test within date.

Are the reagents hazardous?

Some water testing reagents are corrosive or harmful, so read each safety data sheet, wear eye protection and gloves, and keep reagents out of reach of young students.

Should I keep the old instruction leaflet?

Use the leaflet supplied with the refill, since reagent versions and procedures can change. Keep it in the case so the correct order and waiting times are always to hand.

Last Updated: September 2026