Graco 24B156 HD Prime Valve
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$155.75
$178.00
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Graco 24B156 HD Prime Valve is a heavy-duty OEM replacement that ensures reliable priming and smooth pressure control for professional Graco sprayers.
- Fits Ultra Max II 695, 795, 1095, 1595
- Also compatible with TexSpray Mark IV, V, X series
- Replaces older valve part 24A381
- Built for durability and leak-free performance
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HD Prime Valve 24B156 — Functions, Specs & Compatibility
Compatible Machines
This Graco 24B156 HD Prime Valve is used on professional, large-frame electric airless sprayers. Confirm by serial/model plate before ordering.
- Ultra Max II 695 — Standard / ProContractor / IronMan
- Ultra Max II 795 — Standard / ProContractor / IronMan
- Ultra Max II 1095 — Standard / ProContractor / IronMan
- Ultra Max II 1595 — Standard / ProContractor / IronMan
- TexSpray Mark Series — Mark IV, Mark V, Mark X (Standard / ProContractor / IronMan)
Product Overview
The Graco 24B156 HD Prime Valve (Heavy-Duty) controls flow during priming and recirculation, purging air from the fluid section for consistent spray pressure and smooth startup.
- OEM Graco component for durability and sealing performance
- HD design for high-duty, high-output sprayers
- Direct-fit replacement for select Ultra Max II and TexSpray Mark units
At-a-Glance Specifications
| Part Number | 24B156 |
|---|---|
| Type | HD Prime Valve (Heavy-Duty priming/recirculation valve) |
| Replaces / Supersedes | 24A381 (older prime valve on many of the same platforms) |
| Application | Priming, de-aeration, and recirculation of coating prior to spraying |
| Compatibility Family | Ultra Max II 695/795/1095/1595; TexSpray Mark IV/V/X (verify by model/serial) |
| Includes | Prime valve assembly (HD); thread-patch/seal as applicable |
Why Choose 24B156
- Reliable sealing helps prevent recirculation leaks and pressure drop
- Smoother starts by quickly purging air from the pump and hose
- OEM fit for fast swap-in service on supported sprayers
Fitment Guidance
- Match your sprayer family and size to the list under Compatible Machines.
- Confirm part number in your unit’s parts manual; some builds use updated prime-valve blocks.
- When replacing older 24A381, verify the block style and thread configuration.
Installation & Maintenance Tips
- Depressurize and follow lock-out procedures before service.
- Inspect manifold seat and O-rings; replace worn seals to ensure leak-free operation.
- Apply manufacturer-approved thread sealant where specified; avoid over-torquing.
- After install, prime to a waste pail until air is fully purged and flow is steady.
Frequently Asked Questions
Yes—on many Ultra Max II 695/795/1095/1595 and TexSpray Mark units, 24B156 is the heavy-duty successor to 24A381. Always confirm against your model’s parts list.
Typically no. The 24B156 HD Prime Valve is designed for professional, large-frame sprayers (e.g., Ultra Max II and TexSpray Mark). Magnum units use different prime valve assemblies.
Difficulty building pressure, paint recirculating when switched to “spray,” external leakage around the valve, and inability to purge air efficiently are common signs the prime valve needs service or replacement.
Always depressurize the system, follow the sprayer manual, use approved thread sealant if called for, and tighten to manufacturer specs. After installation, prime to waste until flow is steady (no air).
Check your unit’s parts breakdown by model number and serial range. If your sprayer appears in the Compatible Machines list, match the prime valve call-out in the manual to 24B156.
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Paul H.
Ordered this for a job and for the 24B156 HD Prime Valve (Part #24B156) and it solved the issue we were having right away. No issues at all - does exactly what it should.
