Coxreels P-HP-320 High Pressure Spring Rewind Hose Reel | P Series | 3/8" Hose Diameter | 20' Hose Length | 4000 Max PSI

Mobile lube rigs and compact grease bays often need the high-volume flow of a 3/8-inch hose without giving up wall space to a longer reel. The Coxreels P-HP-320 High Pressure Spring Rewind Hose Reel is the smallest 3/8-inch reel in the HP lineup, pairing 20 feet of 3/8-inch ID hose furnished to SAE 100R1 or R2 specifications (steel-reinforced hydraulic hose constructions used industry-wide for high-pressure fluid service) with a hydraulic-grade 4,000 PSI working pressure rating. The larger inner diameter moves substantially more grease or hydraulic fluid per stroke than the 1/4-inch HP reels, which is what speeds up multi-point chassis lube routes and high-volume hydraulic transfer work. Rated for grease and hydraulic oil service up to 212°F — or 135°F with water and synthetic fluids — the reel is purpose-built for compact installations that need to move fluid quickly. The spring rewind motor pulls the stiff braided 3/8-inch hose home, the all-steel frame with powder-coat finish handles fleet and shop use, and the brass swivel inlet matches the reel's full 4,000 PSI capacity. The P-HP-320 fits truck-mounted lube rigs, single-bay grease stations, mobile equipment service rigs, and tight industrial cells where flow rate matters and floor or wall space doesn't allow for a longer reel.

Type: Spring Rewind Hose Reel | Series: P Series (High Pressure) | Hose ID (in.): 3/8 | Hose OD (in.): 11/16 | Hose Length (ft): 20 | Hose Construction: SAE 100R1 or R2 Steel Wire Braid | Max Pressure (PSI): 4,000 | Max Temperature (°F): 212 (135 with water or synthetic fluids) | Service: Grease, Hydraulic Oil | Retraction: Spring Rewind | Approx. Weight (lbs): 47

Features:

• All-steel frame and base with durable powder-coat finish for long service in industrial, fleet, and equipment-service environments
• Pre-mounted 20-foot, 3/8-inch ID hose furnished with SAE 100R1 or R2 steel wire braid construction — higher flow capacity than 1/4-inch HP reels while maintaining hydraulic-grade pressure rating
• 4,000 max PSI rating for grease and hydraulic oil delivery up to 212°F (135°F with water or synthetic fluids)
• Compact 20-foot hose length suits tight installations, mobile rigs, and under-bench mounting where longer reels won't fit
• Multi-position adjustable guide arm directs hose payout at floor, bench, or overhead angles to match installation
• Spring motor delivers consistent rewind tension on the larger braided hose and is rebuildable in the field for extended service life
• CNC-machined brass swivel inlet provides a leak-resistant connection rated to the full 4,000 PSI of the reel
• 47 lb body mounts to wall, ceiling, bench, floor, or vehicle with standard hardware

Made in USA: 

2 Year Warranty 

Applications:

• Mobile lube trucks & service rigs — truck-mounted chassis grease delivery where the larger hose ID speeds up multi-fitting service routes on Class 7 and Class 8 trucks
• Compact fleet grease bays — single-bay chassis lubrication for trucks, trailers, and tractors where reel footprint is constrained
• Hydraulic shop & transfer work — bench-mounted hydraulic stands, jack and ram charging, and oil transfer between reservoirs within the 4,000 PSI rating
• Equipment dealer service centers — point-of-use grease and hydraulic oil delivery at individual service stations where space is at a premium
• Industrial maintenance & MRO — high-volume lubrication of conveyor bearings, press components, and machinery service points in compact work cells

FAQs:

• Q: Why does the 3/8-inch P-HP-320 have a lower PSI rating (4,000) than the 1/4-inch P-HP-120 (5,000)?
  A: Same hose construction class, larger inner diameter. For a given SAE 100R1 or R2 hose wall thickness and braid reinforcement, increasing the inner diameter reduces the maximum working pressure — there's more cross-section pushing outward on the braid. It's not a defect or a downgrade; it's physics. The P-HP-320 trades 1,000 PSI of top-end pressure for substantially higher flow capacity, which is the right trade for grease and hydraulic work that needs volume.
• Q: When should I pick the 3/8-inch P-HP-320 over the 1/4-inch P-HP-120?
  A: Pick the 3/8-inch P-HP-320 when flow rate matters more than the last 1,000 PSI of working pressure — high-volume chassis grease routes, hydraulic fluid transfer, and any application moving meaningful volume through the hose. Pick the 1/4-inch P-HP-120 when working pressure is the constraint — high-pressure hydraulic test stands above 4,000 PSI, or any service routinely pressurized into the 4,000–5,000 PSI range. Both share the compact 20-foot length and the same overall footprint.
• Q: Why no EZ-Coil version of the P-HP-320?
  A: Coxreels offers EZ-Coil controlled retraction on selected models, primarily where hose length and weight create meaningful rebound energy. The 20-foot HP-320 has less stored spring energy at full extension than the longer 25-foot HP-325, so the controlled retraction option isn't offered on this SKU. If you need EZ-Coil specifically and 3/8-inch flow capacity, step up to the EZ-P-HP-325 (25 ft, 3/8" ID, 4,000 PSI) which shares the same hose specs and pressure rating.
• Q: What does "SAE 100R1 or R2" mean, and why both?
  A: SAE 100R1 and 100R2 are Society of Automotive Engineers specifications for hydraulic hose. R1 uses one layer of steel wire braid reinforcement; R2 uses two layers, giving a higher pressure rating and thicker construction. Coxreels furnishes the P-HP-320 with R1 or R2 hose depending on production lot and supplier; both meet or exceed the 4,000 PSI working pressure of the reel.
• Q: Can I use this reel for water or pressure washing?
  A: Not as a primary application. The P-HP-320 is rated specifically for grease and hydraulic oil. Water and synthetic fluids are permitted only up to 135°F, and the hose construction is optimized for petroleum fluids rather than continuous water service. For pressure washing and wash-bay work, use a medium-pressure or wash-bay-specific reel.

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