Thetford 40661 (Superseded by 50581) Sewer Hose Connector – 3 Inch Double Pin Termination Adapter, Black

Product Overview

The Thetford 40661 Sewer Hose Connector (now superseded by 50581) is a direct OEM replacement termination adapter designed for connecting a sewer hose to an RV sewer waste valve. Featuring a 3-inch double pin connection, this adapter provides a secure and dependable connection between your RV waste valve and compatible sewer hose fittings.

Constructed from durable black plastic for long-lasting RV sanitation use, this adapter is ideal for replacing worn, cracked, or leaking sewer hose connectors.

Key Features & Benefits

• Direct Replacement: Supersedes Thetford 40661 with updated part 50581
• Connects Sewer Hose to RV Waste Valve: Reliable RV sanitation connection
• 3-Inch Double Pin Design: Compatible with standard RV sewer hose fittings
• Secure Bayonet-Style Connection: Helps reduce leaks and accidental disconnects
• Durable Construction: Built for long-term RV use
• Easy Installation: Quick-connect sewer hose adapter
• Black Finish: Matches OEM sanitation components

Specifications

• Part Number: 40661 (Superseded by 50581)
• Product Type: Sewer Hose Connector
• Application: RV Sewer Waste Valve Connection
• Adapter Type: Termination Adapter
• Connection Size: 3 Inch
• Connection Style: Double Pin
• Color: Black
• Material: Durable Plastic

Fits These Applications

• Standard RV sewer waste valve connections
• Compatible 3-inch RV sewer hose systems

Common Issues This Part Solves

• Damaged or cracked sewer hose adapter
• Loose or leaking sewer hose connections
• Worn bayonet fittings
• Difficulty securing sewer hose to RV waste valve

What’s Included

• (1) Thetford 50581 Sewer Hose Connector (Replacement for 40661)

Installation Overview

1. Remove the worn or damaged sewer hose connector
2. Clean waste valve connection surfaces
3. Attach the new termination adapter to the RV waste valve
4. Secure compatible sewer hose using the double pin connection
5. Verify proper fit and leak-resistant connection

FAQs

Q: Is Thetford 50581 the same as 40661?
A: Yes—50581 is the direct replacement for the discontinued 40661.

Q: What size connection does this use?
A: This adapter uses a 3-inch double pin connection.

Q: What does this adapter connect to?
A: It connects a compatible sewer hose to an RV sewer waste valve.

Q: Is this compatible with standard RV sewer hoses?
A: Yes, it is designed for use with standard compatible 3-inch RV sewer hose systems.

Why Choose Thetford?

Thetford is a trusted leader in RV sanitation systems, offering dependable OEM replacement parts designed for reliable performance and proper compatibility.