Graco 16U801 Stop Upper Ball
$67.18
$73.25
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A durable replacement part designed for Graco pump lowers that require precise flow control and reliable sealing performance.
- Original Graco part: 16U801
- Upper stop ball for pump lower assemblies
- Supports high-pressure coating and spraying systems
- Corrosion-resistant construction
- Ensures consistent forward fluid flow
Quantity
Genuine OEM Part
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Graco 16U801 Stop, Upper Ball Component
Compatible Machines
The following Graco pump lowers and equipment assemblies list part 16U801 Stop, Upper Ball in their component breakdowns:
- Units with pump lower assemblies referenced in service manual “3A3109.”
- Units with pump lowers listed in manual “3A3110.”
- Industrial and mortar pump configurations documented in manual “3A5275.”
- Older piston pump assemblies listed in “332649A” parts breakdown.
Product Overview
The Graco 16U801 Stop, Upper Ball is a precision valve component used inside pump lower assemblies to regulate one-way fluid flow. It plays a key role in maintaining consistent pumping pressure and preventing material backflow during coating, spraying, or general high-pressure fluid transfer applications.
Key Features
- High-strength, corrosion-resistant metal construction for demanding environments.
- Engineered sealing surface for precise fluid control.
- Designed for long-term durability in heavy-duty pumping systems.
- Suitable for high-pressure industrial, coating, and spray applications.
Material & Durability
- Manufactured for high resistance to abrasion and chemical wear.
- Supports continuous operation in professional spray and mortar systems.
Installation Notes
- Ensure full system depressurization before opening the pump lower.
- Disassemble the pump lower following your equipment’s service manual.
- Install the new stop ball in the correct seat orientation.
- Reassemble, tighten to specified torque values, and test for proper sealing.
Frequently Asked Questions
It serves as a check valve that prevents backflow inside the pump lower assembly. This ensures stable material flow and consistent pumping pressure.
Check the parts list or manual for your sprayer or pump lower. If the component list includes “Stop, Upper Ball – 16U801,” then it is compatible.
Yes, if you have basic mechanical experience. Make sure to depressurize your machine and follow your model’s procedure for pump lower disassembly and reassembly.
Yes. A new stop ball restores proper sealing, improves pressure stability, and reduces internal leakage within the pump assembly.
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