The filter service indicator gauge is a low pressure, return line oil gauge designed to show when a system needs service (operating normally, will need service soon or filter and fluid need serviced or replaced). The 1/8 inch back center mount fit, return line filter head contains castings with a 1/8 inch female national pipe thread gauge port.

• Brand Name: Universal
• Product Type: Pressure Gauge
• Maximum Pressure: 15 psi
• Fits return line filter head castings with a 1/8'' FNPT gauge port
• Low pressure return line oil indicating gauge for: Low pressure return line oil indicating gauge for 15 PSI filter applications, shows when system needs service