Attributes . Manual Drain; Metal Bowl with Sight Glass; 10 - 250 PSIG adjusting range; 5 micron element; 6 oz. bowl; self-relieving standard; spring-loaded diaphragm; Two 1/4" gauge ports located on the front and rear faces of the body. These ports may be used as additional regulated ports or for pressure gauges. Plug unused port(s). supplied with a GC230 gauge . Names