Water Testing & Control

Monitor and manage pool chemistry with test kits, sensors, and controllers.

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    Pentair Solution #2 pH Test, 1 oz | R161178
    Pentair Solution #2 pH Test, 1 oz | R161178
    SKU: R161178
    $16
    $24
    In stock
  • Save 34%
    Pentair Rainbow OTO Replacement Solution #2, 1/2 oz | R161004
    Pentair Rainbow OTO Replacement Solution #2, 1/2 oz | R161004
    SKU: R161004
    $17.04
    $26
    In stock
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    Pentair Solution #3 Acid Demand Replacement, 1 oz | R161185
    Pentair Solution #3 Acid Demand Replacement, 1 oz | R161185
    SKU: R161185
    $15.78
    $24
    In stock
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    PENTAIR WATER POOL AND SPA INC PHENOL RED 24/CS 1OZ SOLUTION #2 | R161180
    SKU: R161180
    $17.25
    $26
    In stock
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    PENTAIR WATER POOL AND SPA INC GAL CYANURIC ACID REAGENT 4/CS | R161626
    SKU: R161626
    $88.82
    $134
    In stock
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    Rainbow Solution #3B, 1 Ounce | R161202
    Rainbow Solution #3B, 1 Ounce | R161202
    SKU: R161202
    $15.65
    $24
    In stock
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    Pentair Rainbow pH Replacement Solution w/ Chlorine Neutralizer, 1/2 oz | R161018
    Pentair Rainbow pH Replacement Solution w/ Chlorine Neutralizer, 1/2 oz | R161018
    SKU: R161018
    $17.04
    $26
    In stock
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    PENTAIR WATER POOL AND SPA INC PROFESSIONAL TEST LAB 6/CS PRO 11 | R151716
    SKU: R151716
    $87.14
    $131
    Out of stock
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    PENTAIR WATER POOL AND SPA INC CYANURIC ACID TABLET 100/CS | R161591
    SKU: R161591
    $11.79
    $18
    Out of stock
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    Pentair Solution Ph 16 Oz | R161126
    SKU: R161126
    $24.66
    $37
    In stock
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    Rainbow #2 Solution Oto, 16 Ounce | R161056
    Rainbow #2 Solution Oto, 16 Ounce | R161056
    SKU: R161056
    $24.66
    $37
    In stock
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    PENTAIR WATER POOL AND SPA INC #752 2-IN-1 TEST KIT 24/CS | R151083
    SKU: R151083
    $43.29
    $65
    Out of stock
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    PENTAIR WATER POOL AND SPA INC DPD #1 TABLET 100/CS | R161576
    SKU: R161576
    $16.29
    $25
    In stock
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    PENTAIR WATER POOL AND SPA INC WATER HARDNESS 48/CS .5OZ SOLUTION #7 | R161642
    SKU: R161642
    $14.40
    $22
    In stock
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    PENTAIR WATER POOL AND SPA INC SINK/FLOAT TUBE THERMOMETER #136 ABS E-Z READ | R141200
    PENTAIR WATER POOL AND SPA INC SINK/FLOAT TUBE THERMOMETER #136 ABS E-Z READ | R141200
    SKU: R141200
    $32
    $54
    In stock
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    Pentair #127 Rainbow Economy Thermometer | R141036
    Pentair #127 Rainbow Economy Thermometer | R141036
    SKU: R141036
    $18
    $37
    In stock
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    SUPER-PRO TEST KIT REFILL PS102CS .5OZ OTO/ PHENOL | K102CBX/SCP
    SKU: K102CBX/SCP
    $17.28
    $26
    Out of stock
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    POOLMASTER INCORPORATED SOLUTION #2 PHENOL RED PS9752 12/CS 1OZ PRO SERIES | 22392
    SKU: 22392
    $16.38
    $25
    In stock
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    POOLMASTER INCORPORATED 3-WAY TEST KIT W/ CASE PS899 SUPREME SERIES | 22340
    SKU: 22340
    $29.07
    $44
    In stock
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    POOLMASTER INCORPORATED .5OZ PHENOL RED REAGENT PS899PHE SUPREME SERIES | 24251
    SKU: 24251
    $15.12
    $23
    Out of stock
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    POOLMASTER INCORPORATED SOLUTION #1 OTO PS9751 12/CS 1OZ PRO SERIES | 22391
    SKU: 22391
    $16.38
    $25
    In stock
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    POOLMASTER INCORPORATED SOLUTION #4 CHLOR NEUTRALIZER PS9754 24/CS .5OZ PRO SERIES | 22394
    SKU: 22394
    $15.12
    $23
    Out of stock
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    POOLMASTER INCORPORATED SOLUTION #5 ALK INDICATOR PS9755 24/CS .5OZ PRO SERIES | 22395
    SKU: 22395
    $15.12
    $23
    Out of stock
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    POOLMASTER INCORPORATED OTO SOLUTION F/ 3-WAY .5OZ | 24261
    SKU: 24261
    $12
    $18
    In stock