Water Hardness Test Kit – Accurate & Easy-to-Use

£9.99 Free Delivery

Our Water Hardness Test Kits provide everything you need to quickly measure the hardness of your water. Each kit includes a colour-change reagent solution and a sample tube, allowing you to test water hardness at home with ease.

Simply collect a water sample and add the reagent solution drop by drop. The water will change colour from pink to blue—count the number of drops required to determine your water hardness level. The result can be used to set up a water softener, check that it’s operating correctly, or assess whether further water treatment is required.

Full step-by-step instructions are included on the packaging. 

Water Hardness Guide

Soft Water (0–99 ppm): 1–5 drops

Hard Water (100–299 ppm): 5–15 drops

Very Hard Water (300+ ppm): 15+ drops

Key Features & Benefits

Accurate readings in mg/l and parts per million (ppm)

Ideal for testing and monitoring water softener performance

Quickly identifies hard or soft water

Simple, colour-change testing method

Multiple tests per bottle for long-term use