Duraflex® Sewer Cap – 3 Inch Termination Cap - 22197

Duraflex® Sewer Cap – 3 Inch Termination Cap - 22197

Black Bayonet Sewer Cap with 3/4" Hose Thread Connection

The Duraflex® 3-Inch Sewer Termination Cap is a heavy-duty RV sewer accessory designed to seal your sewer outlet securely between dump station use. Manufactured by Duraflex, this cap features a bayonet hook connection that fits standard 3-inch RV sewer outlets for a tight, leak-resistant closure.

Built from durable black plastic, this termination cap includes a 3/4-inch hose thread connection with a removable cap, allowing controlled gray-water draining without fully removing the cap. It’s an ideal solution for travel trailers, fifth wheels, and motorhomes looking to prevent drips, odors, and mess while adding convenient drainage capability.

Features & Benefits

Key Features

• 3-inch RV sewer termination cap
• Standard bayonet hook connection
• Heavy-duty black plastic construction
• Integrated 3/4-inch hose thread connection
• Removable threaded cap for controlled draining
• Single cap design

Benefits

• Prevents leaks and odors between dumping
• Secure bayonet connection for reliable sealing
• Allows gray-water draining via hose hookup
• Eliminates need to remove full cap for draining
• Durable design for long-term RV use

Fits These Applications

• RV sewer outlets with 3-inch bayonet fittings
• Travel trailers
• Fifth wheels
• Motorhomes (Class A, B, and C)
• Standard RV waste valve terminations

Common Issues This Sewer Cap Solves

• Drips or leaks from open sewer outlets
• Odors escaping during storage or travel
• Messy sewer terminations between dumps
• Need for controlled gray-water drainage
• Worn or cracked original termination caps

Replaces / Also Known As

• Duraflex 3-inch sewer termination cap
• RV sewer outlet cap
• Bayonet sewer cap with hose connection
• RV waste valve cap

What’s Included

• One (1) Duraflex® 3-Inch Sewer Termination Cap
• Built-in 3/4-inch hose thread with removable cap

Installation & Use Overview

• Align bayonet hooks with RV sewer outlet
• Twist to lock securely in place
• Attach garden hose to 3/4-inch thread if needed
• Remove small cap for controlled draining
• Reinstall cap after use

Frequently Asked Questions

Will this fit my RV sewer outlet?

Yes. This cap is designed for standard 3-inch RV sewer outlets with bayonet-style connections.

What is the 3/4-inch hose thread used for?

It allows controlled drainage—often for gray water—without removing the entire termination cap.

Is this cap leak-resistant?

Yes. When properly installed, it provides a tight, leak-resistant seal.

Can this stay installed during travel?

Yes. It is designed to remain in place between dump station visits and during travel.

Is this sold individually?

Yes. This listing includes one sewer termination cap.