Multiquip EE55857 Ball Cone Check Valve 1/2" NPT Female SS

The Multiquip EE55857 is a genuine OEM Ball Cone Check Valve 1/2" NPT Female SS designed for SG1400C3-55748, SG1400C4F, and SG1600C4F studio and diesel powered generators. As a direct factory replacement, this stainless steel check valve meets the original engineering specifications for these units, giving you confidence that the part will fit and function exactly as intended. DHS Equipment stocks genuine Multiquip OEM parts like EE55857 to keep your generator running without guesswork.

Key Features

• Stainless Steel Construction — Corrosion-resistant SS material stands up to fuel and fluid exposure inside generator plumbing systems, extending service life in demanding operating environments.
• Ball Cone One-Way Flow Control — The ball cone design creates a positive seal that allows fluid to flow in only one direction, preventing backflow and protecting connected system components from pressure reversal damage.
• 1/2" NPT Female Thread — Standard NPT female threading connects directly to existing generator plumbing lines without adapters or rework, ensuring a clean and secure installation.
• Genuine OEM Part — Sourced directly through Multiquip's authorized parts supply, this part is built to the same specification as the original component installed at the factory.
• Confirmed Fitment — Verified for SG1400C3-55748, SG1400C4F, and SG1600C4F generator models, so you can order with confidence that this valve is the correct replacement for your unit.

A check valve controls the direction of fluid flow within a system by opening under pressure in one direction and seating firmly shut to block reverse flow. In a generator application, a properly functioning check valve protects fuel or fluid circuits from backpressure that could disrupt delivery, cause leaks, or damage upstream components. When a check valve wears or fails, reverse flow can occur, leading to inconsistent performance, hard starts, or potential system damage that goes beyond the valve itself.

Part Details

Compatibility & Fitment

Verify Before You Order

Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.

Why Buy From DHS Equipment

Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.

Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.