Underhill - Big Gulp Pro Pump with 36" Chamber and Mudguard Filter

The Underhill BIG GULP PRO Pump is a heavy-duty hand pump designed to quickly remove standing water from irrigation valve boxes, low spots, and equipment enclosures. With a 36-inch clear pump chamber that delivers 35 ounces per stroke and a 72-inch high-grade outlet hose, it’s built for performance in demanding outdoor environments. The aircraft-grade aluminum shaft and ergonomic handle provide smooth, durable pumping action. The 2020 model now includes a Mudguard attachment filter to prevent clogs from mud and debris. Fully serviceable and easy to clean, it’s the ideal water removal tool for irrigation professionals who need reliable, portable performance in the field.

Key Features:

• Delivers 35 ounces per stroke with consistent high-volume pumping
• Self-priming design allows immediate use without pre-charging
• Super-smooth operation with ergonomic grip reduces fatigue
• Mudguard filter prevents debris intake in muddy environments
• Long 72" outlet hose directs water far from work zones
• Rugged design built for professional irrigation and grounds crews
• Transparent chamber helps monitor flow and cleaning needs

Construction & Durability:

• Aircraft-grade aluminum pump shaft for extended durability
• Clear 36" chamber constructed for visibility and resilience
• Corrosion-resistant and weather-safe components
• Heavy-duty outlet hose withstands field use and UV exposure
• Can be completely disassembled for cleaning and servicing

Performance & Functionality:

• 35 oz. displacement per stroke for fast water removal
• Effective for clearing valve boxes, irrigation heads, and trenches
• Self-priming mechanism ensures operational readiness
• Mudguard filter reduces clogging from soil and silt

Ease of Installation & Use:

• Simple operation—no priming, electrical power, or tools needed
• Ergonomic grip makes repeated use comfortable
• Field-ready design for quick deployment and use on job sites
• Breaks down easily for flushing and part replacement

Technical Specifications:

• Chamber Length: 36 inches
• Displacement Volume: 35 oz. per stroke
• Outlet Hose Length: 72 inches
• Material: Aircraft-grade aluminum shaft; clear poly chamber
• Model Year: 2020 with integrated Mudguard filter
• Self-Priming: Yes
• Fully Disassemblable: Yes

Installation & Application:

• Recommended Uses: Valve boxes, sprinkler zones, flatwork drainage
• Operation Method: Manual hand pump
• Common Users: Irrigation contractors, golf course crews, municipal maintenance
• Perfect for removing standing water prior to service or repair

Compatibility & Optional Accessories:

• Mudguard filter included to reduce clogging
• Can be paired with Gulp accessory kits or replacement hoses
• Stores easily in truck beds or maintenance carts