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Inspector Fire Hydrant Flow Test Kit | Light & Compact

SKU
HYDRANTTK
The Inspector Fire Hydrant Flow Test Kit contains tools needed for flow tests of the most common fire hydrants. Every kit contains a 2-1/2" NST test cap, pitot gauge tube, two blades, and two analog pressure gauges—all weighing under 6.2 pounds. Upgrades offer enhanced gauge accuracy, enlarged gauge dials, NIST certification, and ultra-light components.
$475.95

Inspector Fire Hydrant Flow Test Kit

  • One of the industry's most portable solutions for measuring static and residual pressure
  • Designed for use with the most common fire hydrant outlets (2-1/2" NST)
  • Ships standard with valves designed to protect pressure gauges against damage
  • Upgrades reduce weight, add certification, enhance pitot gauge grip, and more
  • Shipped from locations throughout the U.S. for fast arrival times
  • Buy with PayPal or our one-step checkout

Why choose this pitot gauge kit for flow testing?

The Inspector Starter Kit contains the tools you need for flow tests of 2-1/2″ fire hydrant outlets and other water-flowing orifices. Every lightweight, compact kit offers:

  • One brass test cap with a 2-1/2″ NST inlet and a 1/4″ NPT outlet
  • A pitot gauge handle with two blades
  • Two analog pressure gauges in any of eight dial ranges
  • A portable carrying case from Plano—a world-famous manufacturer of hard-shell cases for the outdoors
  • A 43-1/3″ ft. roll of PFTE thread seal tape

This kit is ideal for those who use a test cap to measure flows at male 2-1/2″ NST (National Standard Thread) outlets. The included pitot tubes and blades are also suitable for recording the pressure of water flowing from nearly any open orifice. Take a look at our other flow test kits if you:

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What's in this flow testing kit, and which upgrades are available?

These are some of the smallest and lightest fire flow test kits available: each weighs less than 6.2 pounds and is protected by a small Plano hard-plastic case measuring roughly 14″ x 10″ x 4″. This kit is ideal for two users working in tandem: one can use a test cap and gauge to measure static pressure while another takes pitot gauge readings from an open hydrant.

The Inspector Fire Hydrant Flow Test Kit is available in four models:

  • The Basic Hydrant Kit (802)
  • The Advanced Hydrant Kit (803)
  • The Advanced Dry Hydrant Kit (803A)
  • The Ultra-Portable Hydrant Kit (804)

Upgrading to the Advanced, Advanced Dry, or Ultra-Portable kits will improve gauge accuracy: while pressure gauges included with the #802 kit guarantee 1% accuracy only in their mid-range, upgraded gauges offer 1% accuracy across the entire dial (full-scale accuracy).

In addition, only the Ultra-Portable Kit ships standard with NIST (National Institute of Standards and Technology) traceable gauges. These gauges include documentation explaining when and how the gauge was calibrated, allowing inspectors to conduct tests for government agencies and other entities with rigorous qualifications.

For a summary of these differences (with differences in bold), see the table below.

KitUseTest Cap(s)Pitot TubeBladesGaugesBleederCaseExtras
BasicTesting hydrants at known pressures1 brass test cap (2-1/2″ NST)1 round-handled pitot gauge tube2 standard straight pitot blades2 liquid-filled pressure gauges with 2-1/2″ dials and 1% mid-range accuracy1 single-ball-valve bleeder1 Plano small deluxe case1 roll of PFTE thread seal tape
AdvancedTesting hydrants at variable pressures or when full-range accuracy is needed1 brass test cap (2-1/2″ NST)1 hex-handled pitot gauge tube2 straight pitot blades: 1 standard & 1 ultra-light2 liquid-filled pressure gauges with 2-1/2″ dials and 1% full-range accuracy1 single-ball-valve bleeder1 Plano small deluxe case1 roll of PFTE thread seal tape
Advanced DryTests requiring full-range accuracy and easy-to-read gauges1 brass test cap (2-1/2″ NST)1 hex-handled pitot gauge tube2 straight pitot blades: 1 standard & 1 ultra-light2 3.2″ dry-dial gauges with 1% full-range accuracy1 single-ball-valve bleeder1 Plano small deluxe case1 roll of PFTE thread seal tape
Ultra-PortableWhen portability, accuracy, and certification matter—weighs 5.2 pounds1 brass test cap (2-1/2″ NST)1 ultra-light, high-grip pitot gauge tube2 ultra-light pitot blades: 1 straight, 1 notched2 NIST-traceable Ashcroft 1009AW liquid-filled pressure gauges with 2-1/2″ dials and 1% full-scale accuracy1 double-ball-valve bleeder1 Plano small deluxe case1 roll of PFTE thread seal tape

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Which gauge dial ranges should I choose?

Each gauge provided with this flow test kit is available in one of eight dial ranges. To prolong your gauge’s life, use the table below to choose a range that places your expected pressures at the center of the dial or in the mid-range. For example, inspectors testing outlets with 30 PSI of pressure should choose a 0-60 PSI gauge—or a 100 PSI gauge for 50 PSI test pressures. This table also provides each range’s major and minor graduations (the large and small tick marks along the dial’s face).

Dial RangesCenter of DialMid-RangeMajor #’d GraduationsMinor GraduationsSmallest Graduations
0-60 psi3015-451051
0-100 psi5025-75102
30-0-100 psi352.5-67.5102
0-160 psi8040-12020102
0-200 psi10050-15020102
30-0-200 psi8527.5-142.520102
0-300 psi15075-22550105
30-0-300 psi13552.5-217.550105

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What do I do with these readings?

Pitot gauges provide pressure readings in pounds per square inch (PSI). These readings can be used to estimate how fast water flows, in gallons per minute (GPM), using formulas or a pitot gauge theoretical discharge conversion table (like the one included on each hydrant flow nozzle). Used to convert PSI readings to GPM.

Conversion accuracy depends on an accurate measurement of outlet size and the nozzle or outlet coefficient. For more on how and why to convert PSI to GPM in pitot tests, read QRFS’s “Pitot Gauges: How Do I Calculate the PSI to GPM Conversion?

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