Graco 104784 Indicator Filter

Graco 104784 Indicator, Filter – 20 PSI Warning Device

Compatible Machines

• Graco high-pressure filter assemblies in spray and coating systems
• Graco industrial finishing rigs with fluid filtration modules
• Graco mobile manifolds and pump skid units using filter monitors
• Graco equipment where a 20 PSI differential filter indicator is specified

Product Description

The Graco 104784 Indicator, Filter – 20 PSI is a visual warning device attached to filter housings that alerts operators when the filter element has reached a significant pressure drop—indicating that the element is becoming clogged and requires service. Once the differential pressure across the filter reaches approximately 20 PSI, the indicator changes appearance, prompting maintenance to avoid bypass or system degradation.

Key Features

• 20 PSI threshold: Provides early warning before major system pressure loss or filter bypass occurs.
• Clear visual signal: Allows quick inspection without disassembly.
• Durable construction: Built to withstand the high-pressure and high-cycle environments of Graco fluid systems.
• OEM specified: Designed to match Graco filter housings and service intervals.
• Maintenance aid: Helps reduce downtime by indicating proactive servicing rather than reactive failure.

Technical Specifications

Applications

This indicator is used in Graco filtration systems where maintaining clean elements is critical—such as paint finishing lines, industrial coating rigs, mobile spray trailers and high-flow fluid transfer systems. When the indicator shows the threshold has been reached, the filter element should be serviced or replaced to safeguard system performance, prevent pump over-load and avoid coating defects.

Performance Advantages

• Enables proactive maintenance — reduces risk of filter bypass or system contamination.
• Helps maintain consistent fluid and spray pressure by ensuring filters remain within specification.
• Improves system uptime — visible indicator allows quick check without full disassembly.
• Reduces wear and damage to downstream equipment by ensuring proper filtration.
• OEM compatibility ensures proper fit, calibration and reliability in Graco systems.

Maintenance Tips

During scheduled inspection, verify the indicator shows the normal (green) position. If the indicator shows the warning (red) or cross-sectioned section, relieve system pressure, open the filter housing, replace or clean the element, reset the indicator, and re-install. Ensure the mounting port is clean and the sensor is free of blockage. Replace the indicator if the visual signal fails or becomes delayed in response.

Frequently Asked Questions