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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4196 products

Save £11.37
Palintest Contour Comparator Kit Free & Total Chlorine, Dual RangePalintest Contour Comparator Kit Free & Total Chlorine, Dual Range
Palintest
Palintest Contour Comparator Kit Free & Total Chlorine, Dual Range Sale price£102.33 Regular price£113.70
Palintest Soil Phosphorous Refill Pack (P)
Palintest
Palintest Soil Phosphorous Refill Pack (P) Sale price£80.00
Save £8.47
Lovibond Reference Standard Kit Chlorine - 0.5 and 2.0 mg/l (MD/PM 600 series)Lovibond Reference Standard Kit Chlorine - 0.5 and 2.0 mg/l (MD/PM 600 series)
Lovibond
Lovibond Reference Standard Kit Chlorine - 0.5 and 2.0 mg/l (MD/PM 600 series) Sale price£56.72 Regular price£65.19
Save £4.55
Palintest Ammonia Pocket Kit
Palintest
Palintest Ammonia Pocket Kit Sale price£40.95 Regular price£45.50
Hanna Instruments
Hanna HI-97725 CHLORINE, CYANURIC ACID AND pH PHOTOMETER Sale price£502.46 Regular price£528.90
Save £4.99
Palintest Aluminium Pocket KitPalintest Aluminium Pocket Kit
Palintest
Palintest Aluminium Pocket Kit Sale price£44.91 Regular price£49.90
Palintest Contour Comparator Kit, Universal pH 4-11
Palintest
Palintest Contour Comparator Kit, Universal pH 4-11 Sale price£59.30
Palintest Comparator Kit Hydrogen Peroxide LR 0 - 1 mg/L H2O2Palintest Comparator Kit Hydrogen Peroxide LR 0 - 1 mg/L H2O2
Palintest
Palintest Comparator Kit Hydrogen Peroxide LR 0 - 1 mg/L H2O2 Sale price£72.53
Save £11.82
Hanna Instruments HI-981304 Waterproof pH,EC,TDS & Temp Tester
Hanna Instruments
Hanna Instruments HI-981304 Waterproof pH,EC,TDS & Temp Tester Sale price£224.58 Regular price£236.40
Save £3.75
Hanna Instruments-772 Marine Alkalinity (dKH) Checker HCHanna Instruments-772 Marine Alkalinity (dKH) Checker HC
Hanna Instruments
Hanna Instruments-772 Marine Alkalinity (dKH) Checker HC Sale price£71.35 Regular price£75.10
On sale
Lovibond Bulb, White for Mini W.L.UnitLovibond Bulb, White for Mini W.L.Unit
Lovibond
Lovibond Bulb, White for Mini W.L.Unit Sale priceFrom £17.26
Test All Water
Lead Water Testing Sale price£30.00
Trace2o AquaSafe WSL50 Pro
Trace2o
Trace2o AquaSafe WSL50 Pro Sale price£5,407.50
eXact® LEADQuick with Bluetooth® Photometer
ITS
eXact® LEADQuick with Bluetooth® Photometer Sale price£277.49
Save £3.75
Hanna Instruments HI-7134 Phosphate CheckerHanna Instruments HI-7134 Phosphate Checker
Hanna Instruments
Hanna Instruments HI-7134 Phosphate Checker Sale price£71.35 Regular price£75.10
Save £3.75
Hanna Instruments HI-7214 Iron Checker
Hanna Instruments
Hanna Instruments HI-7214 Iron Checker Sale priceFrom £49.99 Regular price£75.10
Save £2.26
Lovibond Hardness Total Strips
Lovibond
Lovibond Hardness Total Strips Sale price£15.11 Regular price£17.37
Test All Water
HI-70038P TDS Calibration Solution 6.44 g/L (ppt), x25 Sachets Sale price£37.62 Regular price£39.60
Palintest DPD Neutralising 250 Tablets (Discontinued)Palintest DPD Neutralising 250 Tablets (Discontinued)
Palintest
Palintest DPD Neutralising 250 Tablets (Discontinued) Sale price£32.00
Sold out
Palintest Chlorocol 100 Tablets
Palintest
Palintest Chlorocol 100 Tablets Sale price£15.43
Save £208.81
Lovibond SD400 Oxi -Set-1Lovibond SD400 Oxi -Set-1
Test All Water
Lovibond SD400 Oxi -Set-1 Sale price£1,397.42 Regular price£1,606.23
Two boxes of Lovibond Water Testing DPD No. 1 Rapid and Phenol Red Rapid test tablets, each containing 100 test tablets for water testing.Testallwater Lovibond Multipack : DPD No 1 Rapid//Phenol Red Rapid, 100 pack
Lovibond
Testallwater Lovibond Multipack : DPD No 1 Rapid//Phenol Red Rapid, 100 pack Sale price£20.00
Test All Water
Pentair R172214 Lock Ring Replacement Pool/Spa Filter, Feeder and Leaf Traps Sale price£31.95
Test All Water
YSI Pro20i Dissolved Oxygen Meter kit including meter, probe, 4m cable, Sale price£1,200.00

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