Graco 15C989 Gland Packing

The Graco 15C989 Gland Packing seals the piston rod at the pump throat, preventing fluid leaks and maintaining consistent pump pressure.

Fits Graco displacement pumps 16X419, 16X421, 16Y602, and select gas airless pumps
OEM quality for reliable long-term performance
Easy installation with standard V-packing rings
Maintains pump efficiency and leak-free operation

$11.8

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Description

Graco 15C989 Gland Packing – Compatibility & Technical Details

The Graco 15C989 is a male throat gland used in Graco displacement pumps to form a precision seal around the piston rod. This gland, when combined with the correct V‑packing rings, helps prevent fluid leaks and ensures consistent pump performance under pressure.

Compatible Machines

Graco Displacement Pumps 16X419, 16X421, 16Y602 (uses 15C989 in the throat packing stack)
Graco Airless Sprayer Gas Pumps (e.g., series 17H833 / 17H834 / 17H892) — 15C989 appears in their parts diagrams
Graco LineLazer / ProContractor Pumps built on the same displacement pump assemblies

Specifications

Part Number	15C989
Type	Gland, Male, Throat
Function	Seals around the piston rod to prevent fluid leakage at the pump throat
Material	Durable metal body, designed to house V‑packing rings (UHMWPE, leather)
Packings Supported	V‑packing rings (typically leather + UHMWPE) in correct stack order
Service Kit Inclusion	Found in Graco packing repair kits (e.g., 24M830) for certain displacement pumps
Maintenance	Inspect during pump repack or when leakage / performance issues appear

Key Features

Reliable sealing: Provides a strong seal at the throat to help maintain system pressure.
OEM‑grade part: Manufactured by Graco to ensure correct fit and durability.
Compact design: Fits into standard Graco displacement pump configurations.
Supports repacking: Ideal for rebuilds using standard V‑packing stacks.

Installation Notes

Remove the packing nut and old packing material before installing the 15C989 gland.
Stack the V‑packing rings in the correct order (per the pump’s manual), then insert the gland.
Lightly lubricate the gland and the packing stack to ease assembly and improve longevity.
Tighten the packing nut to the torque specification given in your pump’s service manual.
After installation, recheck for leaks under operating pressure and re-torque if necessary.

Frequently Asked Questions

The 15C989 gland forms a seal around the piston rod at the pump throat, working with the V‑packing rings to stop fluid leaks and maintain proper pressure.

Replace the gland whenever you repack the pump or if you notice leaks, reduced pressure, or signs of wear on existing packing.

While third-party glands may physically fit, using the genuine Graco 15C989 ensures optimal sealing, correct dimensions, and longer-term performance.

Installing the gland is quite straightforward if you follow Graco’s repacking procedure: remove old packing, stack new rings properly, insert the gland, and torque the nut correctly.