King 7205018131W Tube Flowmeter 21 Gpm 1 Inch Fnpt

Product Description

The KING 7205018131W is an acrylic tube flowmeter designed to measure water flow rates in general-purpose fluid handling systems. It accepts a 1-inch female NPT connection and handles flow rates up to 21 GPM at a maximum working pressure of 125 psi. The vertical-mount design keeps the float tube properly aligned for accurate readings. With an accuracy rating of 0.03, it delivers reliable measurement for applications where consistent flow monitoring is required. Plumbers, HVAC technicians, and industrial maintenance crews install this type of meter on water supply lines, chiller loops, and process water circuits.

This flowmeter is suited for residential and light commercial water systems where a direct-reading, in-line flow measurement is needed. The clear acrylic housing allows for immediate visual confirmation of flow rate without additional instrumentation. It installs in a vertical orientation on any water line using standard 1-inch NPT threaded fittings. The PVC fittings are compatible with typical water service piping. General-purpose water service is the primary application, making it a practical choice for balancing hydronic loops, verifying pump output, or monitoring service flow during commissioning.

Key Features

• 21 GPM maximum flow capacity for general-purpose water measurement
• 125 psi maximum working pressure rating
• 1-inch FNPT connection fits standard water service pipe sizing
• Clear acrylic housing provides direct visual flow reading
• 0.03 accuracy rating for reliable flow verification
• Vertical mounting orientation ensures float tube alignment and measurement integrity

Compatibility

Designed for general-purpose water service applications using 1-inch NPT threaded connections in vertical-mount configurations.

Installation Notes

Installation should be performed by a licensed plumber or qualified mechanical technician. Shut off the water supply and depressurize the line before threading the meter into the circuit. Mount the unit in a true vertical position — off-axis mounting will affect float movement and measurement accuracy. Apply thread sealant or PTFE tape to NPT threads per standard plumbing practice and verify no leaks before returning the system to service.