Flow Doctor Water Pressure Gauge Kit, 0-200 PSI — 6-piece glycerin-filled gauge with 3/4-inch GHT and 5 adapters

Flow Doctor's glycerin-filled water pressure gauge kit is a complete six-piece solution for measuring household and outdoor water pressure from 0 to 200 psi with a standard 3/4" garden-hose thread and five versatile adapters.

Whether you're diagnosing low water flow, checking pump output, or confirming pressure at an appliance, this kit collects the fittings and a durable liquid-filled gauge you need to get reliable readings across multiple connection types. The rugged steel casing, clear double-dial face, and copper attachment make it suitable for indoor and outdoor use, while adapters convert the standard garden-hose thread into connections for sinks, refrigerators, irrigation lines and more. No special tools or plumbing expertise required — just screw on the appropriate adapter and read the gauge.

How do I measure outdoor faucet or garden hose pressure?

Attach the gauge directly to a standard 3/4" garden hose thread or use the quick-connect adapter for snap-fit hoses. Open the faucet fully to obtain a steady reading, and use the glycerin fill to stabilize the needle for accurate measurement even if the hose or faucet vibrates.

• Use the built-in 3/4" GHT connection for patio spigots and hoses.
• Quick-connect adapter fits snap-fit hose couplers and irrigation tools.
• Read pressure on a double-scale dial from 0–200 psi.
• Glycerin damping reduces needle bounce for stable readings.

Can I test indoor plumbing, appliances, and fixtures?

Yes — the kit includes a 1/2" pipe adapter and a stop-valve adapter so you can measure at house supply lines, washing machine outlets, dishwashers and angle valves without permanent modifications. For thin tubing and filter lines there are 1/4" and 3/8" tube adapters designed to press onto small fittings or work with common T-adapters.

• 1/2" adapter for threaded supply lines, showers, and heaters.
• Stop valve adapter for sinks, toilets, and dishwasher supplies.
• 1/4" and 3/8" tube adapters for filters, ice makers, and aquarium lines.
• Works with washing machine and appliance outlets for quick checks.

What makes the gauge reliable and durable for repeated use?

The gauge case is heavy-duty black steel with a copper attachment to resist corrosion and mechanical wear from repeated connections. The face features precise markings on a double-dial readout and the glycerin fill damps movement so readings remain legible when testing pumps, boosters, or systems under vibration.

• Steel housing protects the movement from impacts and weather.
• Copper connection resists galvanic corrosion at threaded joints.
• Glycerin-filled movement stabilizes the needle for accurate reads.
• Clear markings provide four-unit readouts for flexible interpretation.

How do I pick the right adapter for different systems?

Choose the adapter that matches the thread or tubing size at your test point: 3/4" GHT for garden hoses, 1/2" for household piping, the stop-valve adapter for angle valves, and the tube adapters for small-diameter filter or cooler lines. If an exact fit isn’t available, use a common T-adapter where appropriate to create a test port without cutting lines.

• Match adapter thread/tube size to the fixture for a leak-free test.
• Use T-adapters to reach inline filter or tubing systems safely.
• Hand-tighten connections, then open water slowly to avoid spikes.
• Drain and disconnect after testing to protect the gauge from freezing.

Who this kit is for: homeowners, renters, RV owners, gardeners, and maintenance technicians who need a portable, all-in-one tool for pressure troubleshooting. If you routinely inspect irrigation, pumps, or appliance supplies — or you want a single gauge to cover garden hoses, indoor fixtures and small-diameter tubing — this kit supplies the fittings and a stable, easy-to-read instrument for quick diagnostics and routine maintenance.