Test Equipment & Accessories

Maintain accurate pool and spa water chemistry with water testing equipment and reagents from Pentair, LaMotte, Hayward, American Granby, and Jed Pool Tools. PST Pool Supplies stocks replacement test kit reagents, digital salt meter calibration solutions, pressure gauges, and automated test cartridges for professional and residential water testing — starting from $9.90.

Accurate water testing is the foundation of every effective pool and spa maintenance program — without reliable test results, chemical adjustments are guesswork that lead to cloudy water, equipment damage, and bather irritation. The key products in this collection: Pentair Rainbow test kit reagents cover every standard water chemistry parameter — pH test solution (Phenol Red, #2 reagent, 1/2 oz and 1 oz), chlorine neutralizer (#4 reagent), total alkalinity test solution (#5 reagent), acid demand and total alkalinity solution (#3 reagent), water hardness test solutions (#6 and #7 reagents), and cyanuric acid reagent (32 oz). These reagents are direct replacements for Pentair Rainbow test kit bottles — the same reagent chemistry used by pool professionals. The Pentair #752 Test Kit (2-in-1 pH and chlorine) is a complete entry-level test kit for basic residential use. The LaMotte WaterLink reagent cartridge disks (pack of 100) serve the LaMotte WaterLink photometer system — a professional-grade digital colorimetric tester that measures chlorine, bromine, and salt with lab-accurate results; each disk provides one complete multi-parameter test. The Hayward Digital Salt Meter calibration solution (7,450 ppm) calibrates the Hayward digital salt tester to ensure accurate salt level readings for salt chlorine generator management. Pressure gauges — the American Granby IPG602-4L (0–60 psi, 1/4\" MPT bottom, 2\" face) and Pentair PG3024B back-mount gauge — replace worn or failed filter system pressure gauges that are essential for monitoring filter condition and pump performance.

Reagents degrade over time — replace test kit reagents annually regardless of remaining volume, as aged reagents produce inaccurate readings that can lead to over- or under-dosing chemicals. Store reagents at room temperature away from direct sunlight and freezing temperatures. Pressure gauges should be checked for accuracy annually against a known-good reference; a stuck or drifting gauge prevents accurate filter backwash/cleaning timing.

Shop pool and spa testing equipment at PST Pool Supplies and maintain the water chemistry accuracy that keeps your pool safe, clear, and equipment-protective.