10 Best Water Hardness Test Kit in The UK

Last updated on 05/06/2025

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Best Choice

9.9

Exceptional

Fountain Softeners

Water Hardness Test Kit Domestic

Why We Love It

Easy hardness measurement process.
Accurate results every time.
Up to 100 tests.

Main Highlights

Essential when configuring a water softener to determine the level of hardness in the incoming water supply.
Simply add the drops to a 10mm sample in the tube, each drop counts for 20ppm of hardness.
Add the drops, shaking after each is added until the colour changes from red to blue.
Multiply the number of drops by 20 to get the total hardness in ppm (parts per million) or mg/l (milligrams per litre).
Up to 100 tests in 1 bottle!

20 in 1 Water Testing Kit - Quick & Accurate Home Tap, Well & Pool Test, 145pcs Strips for Hardness, pH, Lead, Chlorine, Iron & More

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Why We Love It

Easy and quick operation.
Wide application for testing.
Precise and accurate results.

Main Highlights

Comprehensive Water Test Kit : Our 20 in 1 house water test kit contains 125 water test strips and 2 other tester kit. It can test many water quantity parameter such as hardness, heavy metals( lead, iron, zinc, copper, manganese, mercury)，inor ganic substances ( fluoride, sulfate, sodium chloride, total chlorine, free chlorine, hydrogen sulfide, nitrate/nitrite), physical properties (PH, total hardness, total alkalinity, carbonate), Organics: QAC/QUAT
Wide Applicability: These water testing kits for drinking water is suitable for home water, well water, garden tap water,pet water, pool water, aquarium and other water quality testing. It is a good choice for house, laboratory or school water quality testing.
Quick & Accurate: Our drinking water test strips can analysis water's composition in deatils. We offer premium-grade quality: accurate and sensitive materials water test kits, making examination of your drinking water are precision and reliability.
Easy to Operation: Only take 3 steps to get accurate results. First, With dry hands, Immerse the test strip in water for 2 seconds. Then remove it again and hold it for 30-60 seconds, Do not shake off excess fiuid. Finally match the strip color to the color chart confirm the result. The kit is 99 percent accurate.
Save Money and Time: Our drinking water quality test kits do't need to go to the laboratory or find a specialized agency testing, saving you a lot of money and time. The daily water quality can be easily tested at any time, ensuring the water safety of families and pets, and giving us a healthier water environment

TESPERT Water Testing Kits for Drinking Water 125 Strips - 16 in 1 Drinking Water Test Kit - Water Test Strips with Hardness, Lead, Iron, Copper

22% OffFree Shipping

Why We Love It

Ensures safe drinking water.
Saves money and time.
Comprehensive 16-parameter testing.

Main Highlights

【Calling for Health】We needs to identify and ensure that our home drinking water is safe and clean, free from common contaminants, and not contaminated above EPA Recommended Safe Levels (Maximum Contaminant Levels) to protect our health
【Save Money & Test 125 Times】Our Water Test Kit for drinking water supports 16 parameters for each test strip, 125 strips in total, which equals 125 water tests with 1 piece of product. This saves money and time rather than lab testing these separately. You can stay up to date on your water quality
【16-in-1 Home Water Test Kit】 Our Water Tester Kit for drinking water contains 16 parameters, it covers all the main contaminants you need to worry about, including Total Hardness, Free Chlorine, Total Chlorine, Bromine, Total Alkalinity, pH, Nitrate, Nitrite, Copper, Iron, Lead, Nickel, Carbonate, MPS, Cyanuric Acid, Sulfite
【A Brand You Can Rely On】TESPERT is a company with 30 years of experience in the water quality testing industry, having the world's top laboratories and research teams, and over 100 million users worldwide. We are committed to identifying water quality problems and finding professionals to solve them so that everyone can use clean drinking water
【Dedicated Team of Experts】Our team of experts has more than 30 years of expertise in the water quality industry. We will do our best to answer all your questions about our water test kit products. We are here for you

Premium Water Hardness Test Kit | Fast and Accurate Hard Water Quality Testing Strips for Water Softener Dishwasher Well Spa Pool, etc. | 0-425 ppm | Calcium and Magnesium Total Hardness (150 Strips)

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Why We Love It

Accurate test results within seconds.
Easy to read results.
Supports non-profit charity.

Main Highlights

QUICK AND ACCURATE - Save time and get accurate test results within seconds. Simply dip the strip into the water and compare it to the large color chart on the bottle. No need to visit a store or wait for someone else to test the quality of your water. Enjoy consistently accurate and reliable results whenever you need them.
EASY TO READ RESULTS - The oversized color chart makes reading your results effortless. Compare your results from red to green, with values of 0-25 GPG and 0-425 PPM.
Varify FreshSeal (EXTENDED SHELF LIFE) - This kit includes a ready to use bottle and two separately sealed pouches of 50 strips. Simply empty the refill pouch into the bottle once the initial strips are used up. Test confidently knowing that your strips are sealed for guaranteed freshness and reliability.
24/7 DEDICATED SUPPORT TEAM - With more than 20 years of experience in the water testing industry, our devoted team of EPA water quality experts are ready to offer timely and informative responses based on your needs. Your question is just one click away from a live team member.
SUPPORTS NON-PROFIT CHARITY - Each sale sponsors clean water for someone in the Central African Republic for a year. Support worldwide change while monitoring your water hardness. #WaterForGood #CleanWaterWorldwide

Water Hardness Test Kit for Water Softeners, Drinking Water & Water Testing, Drop by Drop Reagent Test Kit with Reading in PPM (Parts Per Million)

Why We Love It

Simple to use tests.
Multiple uses available.
Remarkably accurate readings.

Main Highlights

EASY TO USE: Simple to use drop by drop test giving an accurate reading of water hardness in parts per million (PPM)
RE-USABLE: Each kit has multiple uses per bottle (varies depending on hardness of water being tested
ACCURATE: Utilises renowned reagent technology to give an accurate reading compared to test strips
VERSATILE: Useful for programming water softeners and for general water testing purposes

Labsales 2-in-1 Spa & Pool Water Test Kit - Alkalinity & Hardness, Easy Results in Seconds, 10 Tests Included

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Why We Love It

2-in-1 tester convenience.
Unparalleled accuracy guaranteed.
Results in seconds.

Main Highlights

【2-IN-1 TESTER】This Clever Hot Tub and Spa Test kit allows you to quickly and easily check for Alkalinity and Hardness in your swimming pool with true confidence, using superior colour identification and eco friendly green chemistry
【UNPARALLELED ACCURACY】Using the same technology as professional spa test kits our product will always show the correct results so you can be sure to get your chemicals just right for your tub
【SEE THROUGH THE COLOUR】Our colour change sampler allows you to see colour through the water meaning you certainly won't miss the colour change simply rinse down the drain when complete
【RESULTS IN SECONDS】Simply take a small sample add the tablet and continually add sample drop by drop until colour change occurs the complete test can be done in a matter of seconds giving you more time to enjoy relaxing with family and friends
【LOW COST REFILL】No need to buy the whole system again just purchase one of our Low cost refill kits that come with 30 professional tests for Alkalinity and Hardness all for under £7.00

SimplexHealth Total Hardness Water Test Strips (50 Strips) in resealable Aluminium Pouch

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Why We Love It

Highly accurate and affordable.
Excellent value for money.
Quick 3-second test time.

Main Highlights

Total test time: 3 seconds, number of tests: pack of 50
With their low cost and high accuracy, Simplex Health total hardness test strips also offer you time-savings
50 test strips per resealable pack, excellent value for money
Sensitivity: 0, 40, 80, 120, 180, 250, 425, 1000 PPM (MG/L) or 0, 2, 5, 7, 11, 15, 25, 58 GPG

Aqualuna Water Hardness Test Kit - Fast and Accurate Testing for Dishwasher, Drinking Water, Pool and Aquarium - 100 Strips Hard Water Test Kit at 0-425ppm - Maintain Water Quality

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Why We Love It

Fast and accurate results.
Monitors hardness levels weekly.
24/7 customer service available.

Main Highlights

💧YOUR WATER CARETAKER – Designed specifically for drinking water, dishwasher, pool and spa. Water hardness test kit provides quick and reliable results to verify water quality. Test strips are made of high-quality fiber paper and no color bleeding pads, providing fast and accurate results.
💧The Range of the Color Chart- The degree of water hardness classified in terms of its calcium carbonate concentration. The total hardness is measured in both 0-25 GPG and 0-425 PPM from green to red. eeding pads, providing fast and accurate results.
💧QUICK & RELIABLE RESULTS - Dip the test strip into the water for 2 seconds before removing. Wait 60 seconds for the strip to change color. Match the color of the strip with the color chart for your results.
💧REGULARLY TEST- Water hardness test strip monitors your hardness levels to protect against corrosion, scale formation, cloudy water, or excess foam. It is important to establish a maintenance routine for at least once per week.
💧CUSTOMER SATISFACTION IS OUR TOP PRIORITY - We value your opinion, and our team strives to provide the highest quality of service to our customers. Customer service is available 24/7.

Pawfly Water Hardness Test Strips 100 Pieces Hard Water Test Kit for Drinking Water Tap Water Well Pool Spa Water Softener Accurate Softener Water Quality Testing Kit for Calcium & Magnesium

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Why We Love It

Fast and accurate results.
Easy to use.
Highly sensitive test strips.

Main Highlights

Water Hardness Test Strips: This hard water test kit quickly detects the hardness of all water. Always provide real-time tests to keep water clean and safe to drink or use.
Easy to Use: First, immerse one test strip into the water sample for 2 sec. Second, take out the strip and hold it horizontally for 15 sec. Last, compare the result with the color chart on the ziplock bag.
Fast & Accurate Result: The testing strips are highly sensitive to detect even low levels of water hardness. Test range: 0-425 PPM or 0-25 GPG. And the easy-to-read color chart allows you to instantly interpret the test results.
Regular Test: The water hardness test kit contains 100 strips in total. Really convenient to monitor the water quality at regular intervals. Effectively help maintain optimal water conditions to reduce limescale on pipes or home appliances.Shelf life is 2 years before opening, 100 days after opening.
Reliable Material: Made of dependable fiber paper, the water quality testing kit provides instant results. Widely applicable to drinking water, tap water, wells, showers, water softeners, swimming pools, spas, laboratories, industry, etc.

60 PCS Water Testing Kits for Drinking Water,Water Hardness Test Kit,Drinking Water Test Kit,Water Test Kits,Testing pH,Hardness,Chlorine,Lead,Iron,Copper,Nitrate etc

11% OffFree Shipping

Why We Love It

Comprehensive water quality analysis.
Easy and quick to use.
Portable for testing anywhere.

Main Highlights

Comprehensive Water Quality Test: This water testing kits for drinking water provides you with a comprehensive water quality analysis, which can accurately measure important parameters such as pH, water hardness, chlorine, lead, iron, copper and nitrate. With this water testing kit, ensure the safety and quality of drinking water.
Easy to Use: This water hardness test kit ensures fast and accurate test results. It is easy to operate and does not require special expertise or complicated procedures. Use this drinking water test kit to test your water source anytime, anywhere and take immediate action when necessary.
Packing List: You will receive 60 pieces of water testing kits for drinking water, 1 test tube, 1 dropper and 1 temperature paper, which are sufficient quantities to meet your daily use needs. Water test kits is very suitable for continuous monitoring and wide application.
Easy to Carry: This water testing kit adopts a portable design, small size and light weight. You can carry water test kit when you go out or travel, and test water quality anytime, anywhere.
Wide Applicability: This water hardness test kit has a wide range of applicability and is very suitable for evaluating outdoor water sources, home water quality, industrial water testing, aquarium maintenance and pool care. The shelf life of drinking water test kit is 2 years, so you can store it for a long time.

9.3

Superb

Save 11%

We scanned 1341 products

We reviewed these offers relevant to the Water Hardness Test Kit within online retailers such as Amazon, eBay and other local retailers, ensuring we covered all major brands and models. The products we selected come from trusted brands like Fountain Softeners, Generic, TESPERT, VARIFY, Ultra Soft Water, The Labsales Company, SimplexHealth, AQUALUNA, Pawfly, MADGININE, all of which have a reputation for consistently delivering high-quality products that users love and innovative approaches for function & design.

For the best Water Hardness Test Kit in the market, we considered we took a deep dive into 6706 online reviews , focusing on elements like user satisfaction, performance in real-world conditions, and long-term reliability. Our ranking also evaluates each review’s relevancy, authenticity, up-to-dateness and depth so that the comparison is more sound.

We concluded that:

The clear winner of our analysis is Water Hardness Test Kit Domestic. We love many things about this product by Fountain Softeners. What sets it apart from the competition is Easy hardness measurement process, Accurate results every time, Up to 100 tests.
The best value product for most shoppers and where user satisfaction is continuously the highest is 20 in 1 Water Testing Kit - Quick & Accurate Home Tap, Well & Pool Test, 145pcs Strips for Hardness, pH, Lead, Chlorine, Iron & More by Generic based on online reviews by bloggers, experts and online shoppers.
The biggest bargain at the moment for Water Hardness Test Kit and the best cost-to-value ratio is TESPERT Water Testing Kits for Drinking Water 125 Strips - 16 in 1 Drinking Water Test Kit - Water Test Strips with Hardness, Lead, Iron, Copperat TESPERT with a 22% discount.
Our list of the best Water Hardness Test Kit is updated regularly to reflect new releases and changes in product availability, so be sure to check back often for the latest rankings and discounts.

10 Best Water Hardness Test Kit in The UK

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We scanned 1341 products

We concluded that: