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UPR Pro-Series Billet Check Valve 5/8" (17mm) - 0 PSI Cracking, 0-100 PSI Operating
Key Features & Benefits:
0 PSI Cracking Pressure — pulls full vacuum, no lag. Required for boosted PCV systems.
0-100 PSI Operating Range — handles any reasonable boosted application.
Serviceable Billet Body — Ultra-Bite hex-nut disassembly for cleaning & internal inspection.
5/8" (17mm) Hose Barbs — matches UPR Dual-Valve catch can plumbing.
Made in USA — billet body, face-seal O-ring, polymer check ball.
Available
Zero-Crack, Serviceable, Boost-Proof.
Pro-Series 5/8” billet check valve with 0 PSI cracking pressure and a 0-100 PSI operating range — the heart of every UPR dual-valve catch can system. Disassembles for service, handles boost, and pulls full vacuum without lag.
Product Overview
The UPR Pro-Series 5/8″ (17mm) Billet Check Valve is a zero-PSI cracking, fully serviceable one-way valve engineered to pull maximum vacuum through an oil catch can system. On boosted applications, the factory PCV system fights you — positive manifold pressure tries to reverse flow and push oil vapor back into the intake. A zero-cracking check valve stops that reversal cold while adding no measurable restriction in normal vacuum operation.
This is the same Pro-Series valve used as the upgrade option on UPR dual-valve Plug-N-Play catch cans — including the dual-valve system on the UPR Explorer ST 3.0L EcoBoost Catch Can. Boosted ECS/ECSS systems run a pair of these valves; sold here as a single for replacement, rebuild, or to double-up on a custom install.
Specifications
| Part Number | UPR 5044-03 |
| Hose Size | 5/8″ (17mm) Barbed, both ends |
| Cracking Pressure | 0 PSI |
| Operating Pressure | 0-100 PSI |
| Operating Temperature | -30°F to +400°F |
| Body Material | Billet Aluminum |
| Check Ball | Corrosion-Resistant Polymer |
| Sealing | Exclusive Face Seal O-Ring |
| Hose Retention | Ultra-Bite Locking Hose Barbs |
| Disassembly | Hexagonal Nut — opens for cleaning / spring adjustment |
| Origin | Made in USA |
| Sold As | Single Valve (2 required for full dual-valve PCV/ECSS kit) |
Fitment
- Upgrade / replacement valve for any UPR Dual-Valve Pro Series Catch Can using 5/8″ (17mm) barbed check valves
- Explorer ST 3.0L EcoBoost (5030-249-1-ECSS) — uses a pair
- Any custom PCV catch can install with 5/8″ (17mm) internal-diameter hose
- Boosted Coyote, EcoBoost, Hellcat, and GM LT applications running a dual-valve catch can
What’s Included
- (1) UPR Pro-Series Billet Check Valve, 5/8″ (17mm), 0 PSI cracking pressure
- Pre-installed face seal O-ring
- Pre-installed Ultra-Bite hose barbs, both ends
Installation Notes
Install in-line on the PCV or clean-side hose, arrow pointing the direction of flow (away from the engine, toward the catch can or intake depending on which side). Five-minute install with a pair of hose clamps. For cleaning: back off the hex nut, rinse the check ball and spring in solvent, reassemble. Spring can be removed entirely to reduce cracking pressure further on specialty applications.
Boosted dual-valve systems require two valves — one per PCV leg. Order the quantity your system needs.
This is the factory-match replacement for the catch can system on FFP. See the full dual-valve catch can at UPR Explorer ST Catch Can.
Support
Authorized UPR Products dealer. Building a custom dual-valve setup or unsure whether your existing catch can uses the 5/8″ barb version? Call our shop at 805-267-9762. Shop rate $250/hour for install or fabrication labor.
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