Graco 115099 Garden Hose Washer Inlet Seal

The Graco 115099 Garden Hose Washer / Inlet Seal provides a leak-proof seal at the sprayer’s inlet connection for reliable performance and easy maintenance.

OEM Graco part ensures precise fit and lasting durability.
Prevents leaks and maintains proper pump priming.
Fits popular Graco sprayers including Ultra, Ultra Max II, ST Max, Pro210ES, and more.
Simple installation—no tools required.

$0.42

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Description

Compatible Machines

The Graco 115099 Garden Hose Washer / Inlet Seal fits a wide range of Graco airless sprayers that use a garden-hose style inlet. Popular compatibles include:

Ultra 395
Ultra 495
Ultra 595
Ultra Max II 490
Ultra Max II 495
Ultra Max II 595
Ultra Max II 1095
Ultra Max II 1595
Ultimate NOVA 395
Ultimate Super NOVA 495
Ultimate Super NOVA 595
ST Max 395
ST Max 495
ST Max 595
Pro210ES
390 / 390 Classic / 390 Nova
FinishPro 290

If your sprayer has a garden-hose style inlet screen or swivel, this 115099 inlet seal is often the correct washer. When in doubt, match by part number or ask us with your exact model code.

Product Overview

The Graco 115099 Garden Hose Washer (also called an Inlet Seal) sits at the hose connection on the intake side of the pump. Its job is to seal the joint and prevent air leaks or drips that can lead to priming issues, pressure loss, or messy connections. This is a genuine Graco service part for quick, low-cost maintenance.

Key Benefits

Stops leaks at the garden-hose inlet connection.
Restores prime reliability by eliminating air intrusion.
OEM fit for consistent sealing and longevity.
Fast replacement—no special tools required.

Specifications

Part Number	115099
Item Type	Garden Hose Washer / Inlet Seal
Location	Inlet / garden-hose connection to the pump or inlet fitting
Compatibility	Selected Graco Ultra, Ultra Max II, ST Max, Ultimate NOVA, Ultimate Super NOVA, Pro210ES, 390, and other models (see list above)
Package Contents	1 × 115099 washer (quantity per listing)

Installation Tips

Depressurize sprayer and disconnect the garden hose from the inlet.
Remove the worn washer from the inlet fitting; clean any debris.
Seat the new 115099 washer evenly inside the inlet.
Reconnect hose hand-tight, then snug; do not overtighten.
Prime and test for leaks; re-snug if necessary.

Frequently Asked Questions

Common signs include drips at the inlet, difficulty holding prime, or visible cracks/flattening of the washer. If you see wear or leaking, replace the washer.

It functions like a seal at the garden-hose inlet. Some catalogs call it an O-ring/washer, but for this location use the Graco 115099 washer specified for your sprayer.

Many Graco units with garden-hose style inlets use 115099, but some variations exist. Check your model’s parts list or contact us with your exact model number for confirmation.

Keep the inlet screen clean, avoid overtightening the hose, and flush the unit after use. Inspect the inlet seal during routine maintenance and replace at the first sign of wear.