Low pressure oil return pressure gauge
Filter service indicator pressure gauge is a low pressure oil return gauge designed to show when the system needs service (normal operation, service will be needed soon or service or replacement of filters and fluids will be required). 1 / 8-inch back center mounting accessory, return line filter head includes castings with 1 / 8-inch female national threaded holes.
2 inch 0-25 PSI filter indicator
For return pipe filter castings with 1/8 inch FNPT size ports https://www.hongqiinstrument.com/pressure-gauge/general-pressure-gauge/low-pressure-oil-return-pressure-gauge.html