Best Selling Products

Our Best Selling Products category features the most popular and trusted water testing solutions chosen by professionals and everyday users alike. From quick and easy test kits to advanced meters and reagents, these products have earned their place as customer favourites for their reliability, accuracy, and ease of use. Whether you’re testing pool water, drinking water, or industrial systems, these top picks deliver the dependable results you can count on.

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4195 products

Lovibond Copper No.2 Test ReagentsLovibond Copper No.2 Test Reagents
Lovibond
Lovibond Copper No.2 Test Reagents Sale price£40.17
Lovibond Chloride Combi-PackLovibond Chloride Combi-Pack
Lovibond
Lovibond Chloride Combi-Pack Sale price£52.53
Lovibond Chlorine DPD Checkit AF530Lovibond Chlorine DPD Checkit AF530
Lovibond
Lovibond Chlorine DPD Checkit AF530 Sale price£49.55
On sale
Lovibond Chloride No.1 TabletsLovibond Chloride No.1 Tablets
Lovibond
Lovibond Chloride No.1 Tablets Sale priceFrom £23.38 Regular price£26.87
Lovibond Checkit Comparator Chlorine 10 - 300mg/lLovibond Checkit Comparator Chlorine 10 - 300mg/l
Lovibond
Lovibond Checkit Comparator Chlorine 10 - 300mg/l Sale price£73.06
Lovibond Checkit Comparator Phosphate LRLovibond Checkit Comparator Phosphate LR
Lovibond
Lovibond Checkit Comparator Phosphate LR Sale price£71.20
Lovibond Checkit Comparator Copper HR Free Test KitLovibond Checkit Comparator Copper HR Free Test Kit
Lovibond
Lovibond Checkit Comparator Copper HR Free Test Kit Sale price£75.02
Save £38.97
Lovibond AF112A Free, Combined & Total Chlorine Kit
Lovibond
Lovibond AF112A Free, Combined & Total Chlorine Kit Sale price£260.78 Regular price£299.75
LaMotte Insta-Test Copper Test StripsLaMotte Insta-Test Copper Test Strips
Lamotte
LaMotte Insta-Test Copper Test Strips Sale price£17.20
Lead Water Test, 2 testsLead Water Test, 2 tests
ITS
Lead Water Test, 2 tests Sale price£19.64
Test All Water Calcium Hardness Plus - Calcium ChlorideTest All Water Calcium Hardness Plus - Calcium Chloride
TEST ALL WATER
Test All Water Calcium Hardness Plus - Calcium Chloride Sale priceFrom £6.14
On sale
Lovibond Hardness Low Range BW TabletsLovibond Hardness Low Range BW Tablets
Lovibond
Lovibond Hardness Low Range BW Tablets Sale priceFrom £21.79 Regular price£25.05
Save £3.59
Hanna Instruments-775 Freshwater Alkalinity Colorimeter - Checker®HCHanna Instruments-775 Freshwater Alkalinity Colorimeter - Checker®HC
Hanna Instruments
Hanna Instruments-775 Freshwater Alkalinity Colorimeter - Checker®HC Sale price£68.31 Regular price£71.90
Save £3.75
Hanna Instruments-700 Ammonia Low Range Colorimeter - Checker HC (0.00 to 3.00ppm)Hanna Instruments-700 Ammonia Low Range Colorimeter - Checker HC (0.00 to 3.00ppm)
Hanna Instruments
Hanna Instruments-700 Ammonia Low Range Colorimeter - Checker HC (0.00 to 3.00ppm) Sale price£71.35 Regular price£75.10
Floating Chlorine Tablet Dispenser - Small
vendor-unknown
Floating Chlorine Tablet Dispenser - Small Sale price£6.70
Eutech Waterproof EcoTestr TDS Low with ATC, 1 point CalibrationEutech Waterproof EcoTestr TDS Low with ATC, 1 point Calibration
Eutech
Eutech Waterproof EcoTestr TDS Low with ATC, 1 point Calibration Sale price£64.67
Save £2.20
Lovibond DPD 3 High Calcium Tablets
Lovibond
Lovibond DPD 3 High Calcium Tablets Sale price£14.76 Regular price£16.96
Save £3.58
Lovibond Copper No.2 Test TabletsLovibond Copper No.2 Test Tablets
Lovibond
Lovibond Copper No.2 Test Tablets Sale price£23.96 Regular price£27.54
On sale
Lovibond Buffer pH 7 TabletsLovibond Buffer pH 7 Tablets
Lovibond
Lovibond Buffer pH 7 Tablets Sale priceFrom £21.09 Regular price£24.24
On sale
Lovibond Buffer Tablets pH4Lovibond Buffer Tablets pH4
Lovibond
Lovibond Buffer Tablets pH4 Sale priceFrom £21.60 Regular price£24.83
Test All Water BC1/CC1 - Chloride IndicatorTest All Water BC1/CC1 - Chloride Indicator
DTK-TAW
Test All Water BC1/CC1 - Chloride Indicator Sale priceFrom £5.81
HTH Calcicol Calcium Hardness ReagentsHTH Calcicol Calcium Hardness Reagents
HtH
HTH Calcicol Calcium Hardness Reagents Sale price£35.28
Save £83.22
Lovibond MD50 CODLovibond MD50 COD
Lovibond
Lovibond MD50 COD Sale price£556.94 Regular price£640.16
Milwaukee PH-START Starter Solution Kit for pH Meters and Testers
Milwaukee
Milwaukee PH-START Starter Solution Kit for pH Meters and Testers Sale price£65.81

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