Dometic 1-1/2 Inch Diameter Duck Bill Valve 385310076

Dometic Duck Bill Valve – 1-1/2″ Diameter (2-Pack)

The Dometic 1-1/2 Inch Duck Bill Valve (2-Pack) is a critical replacement component for Dometic RV and marine sanitation systems, designed to maintain proper vacuum pressure, waste flow, and odor control. These one-way valves open under pressure and instantly reseal to prevent backflow, ensuring your toilet or vacuum generator operates efficiently and hygienically.

Ideal for routine maintenance or troubleshooting vacuum loss, this 2-pack provides OEM-correct fit and performance for Dometic systems that rely on duck-style check valves.

Key Features & Benefits

• OEM-Correct Replacement – Designed to Dometic specifications
• One-Way Flow Control – Maintains vacuum pressure and prevents backflow
• Improves Flush Performance – Restores suction and system efficiency
• Odor Prevention – Helps seal waste system to stop holding tank odors
• Durable Rubber Construction – Resists wear from waste and chemicals
• Convenient 2-Pack – Replace both valves at the same time for best results

Fits / Compatible With

• Dometic Vacuum generators
• Dometic SeaLand VacuFlush toilet systems
• Dometic sanitation systems using 1-1/2″ duck ball / duckbill-style valves

Always confirm valve size before ordering.

What’s Included

• (2) Dometic Duck Bill Valves
• Valve Diameter: 1-1/2 Inch

Specifications

• Valve Style: Duck Bill / One-Way Check Valve
• Diameter: 1-1/2 Inch
• Quantity: 2 per package
• Application: Vacuum and waste flow control

Common Issues This Part Solves

• Weak or inconsistent flushing
• Loss of vacuum pressure
• Toilet bowl not clearing properly
• Odor coming from toilet or system
• Pump cycling more frequently than normal

Installation Overview

• Power off the sanitation system
• Access vacuum generator or valve housing
• Remove worn duck bill valves
• Install new valves in the correct orientation
• Restore power and test for proper vacuum and flush

Replacing both valves at the same time is recommended.

Frequently Asked Questions (FAQ)

What is a duck bill valve used for?

A duck bill valve allows waste to flow in one direction while sealing immediately to maintain vacuum and prevent backflow and odors.

How do I know if my duck bill valve needs replacement?

Signs include loss of vacuum, weak flush, odor issues, or the vacuum pump running too often.

Should I replace both valves at once?

Yes. Dometic recommends replacing duck valves in pairs to ensure balanced vacuum performance.

Is this an OEM Dometic part?

Yes. These valves are manufactured to Dometic OEM specifications.

Is this the same as a duck ball valve?

Yes. “Duck ball” and “duckbill” are commonly used interchangeably to describe this one-way valve design.