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Water Safety & Flow Control



Air Test Assembly Gauges with Shutoff Valve


4 in. (100mm) Dial


Series IWTG-HTX Air Test Assembly Gauges are used in commercial, residential, and institutional HVAC applications They consist of a 3/4 in. FPT chrome-plated brass manifold with shutoff valve, steel case, Kostil Polymer window, 3/4 in. FPT x Schrader type air valve w/cap connection, set hand and copper alloy Bourdon tube pressure element. 1% Accuracy, full range. Available in 0-5psi or 0-10psi pressure rating scales.

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Disclaimer: Watts product dimensions in U.S. customary units and metric are approximate and are provided for reference only. For precise measurements, please contact Watts Technical Service. Watts reserves the right to change or modify product design, construction, specifications, or materials without prior notice and without incurring any obligation to make such changes and modifications on Watts products previously or subsequently sold.

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Additional Information

Danger – Scalding Lurks!

Every year, thousands of people suffer serious thermal shock or scalding injuries in their bathtubs, sinks and showers.

Click here for informative resources to help you protect against these dangers.

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Thermostatic Mixing Valves

Every year thousands suffer injuries as a result of hot water scalding and thermal shock injuries. Thermostatic mixing valves protect against these dangers.

To learn more about thermostatic mixing valves and how they work, click here.