Graco 104992 Sight Glass Kit

Compatibility & Key Fitment (Put First)

This Graco 104992 Sight Glass Kit is used on the air-side FRL (filter-regulator-lubricator) assembly—specifically with the 1/2 in (NPT) filter body it’s designed for.

• Any system using Graco 106149 Air Filter (1/2 in NPT) → fits with 104992
• Rig/compressor FRL blocks that specify a 1/2 in sight glass kit matching 104992
• Industrial spray setups where the air filter bowl sight glass is the 1/2 in Graco pattern (check your FRL plate/parts list)

What It Is

The Graco 104992 Sight Glass Kit is an OEM replacement sight window kit for the FRL filter bowl. It restores clear visibility of bowl/drop rate conditions so operators can monitor air-side condition at a glance.

Quick Specs

Key Benefits

• OEM fit & sealing for the specified 1/2 in FRL filter body
• Clear visibility to check bowl condition / oil drop monitoring
• Fast service—refreshes a cloudy/damaged sight window

Notes & Verification

• Match by FRL component: if your rig’s air filter is 106149 (1/2 in), this kit is the correct sight glass.
• If your FRL is a different size family, use the corresponding kit (e.g., 3/8 in or 3/4 in families use different sight glass kits).
• Check your machine’s parts manual or FRL dataplate for the filter part number before ordering.

Frequently Asked Questions