The 7000 Injection Rate Gauge is of the same construction as the 5700 Gauge but is provided with a spring-loaded test valve similar to the valve supplied on the 779 Drum Gauge. The test valve is used to isolate the chemical supply tank from the gauge to conduct a one minute calibration test for the chemical pump.

The test valve has a 1/2″ coupler welded to the side for mounting the 7000 Gauge to the valve. The valve mounts in the 3/4″ outlet of a 55 gallon horizontal drum. The bottom connection for the chemical pump suction line is 1/4″ NPT. The test valve is available in either zinc plated carbon steel or 302/304 stainless steel.