Essex Water Gauges WeSTOCKseveral of the ESSEX Brass Water Gauges for liquid level indication. Essex Number 1 Self-Cleaning Water Gauge, forged body, metal wheels, tested for pressures up to 200 Pounds,1/2" NPT Connection, 5/8" O.D. Glass (1-1/2" shorter than centers), 2 rods (1/2" longer than cente...