Thetford 40540 (Superseded by 50389) Sewer Hose Connector – SmartTote™ Premium Double Pin Termination Adapter

Product Overview

The Thetford 40540 Sewer Hose Connector (now superseded by 50389) is a direct OEM replacement double pin termination adapter designed for Thetford SmartTote™ Premium portable waste holding tanks. Featuring a 3-inch bayonet end, this connector provides a secure connection between compatible sewer hoses and SmartTote waste tanks.

Constructed from durable black plastic for long-term RV sanitation use, this adapter is ideal for replacing worn, cracked, or damaged sewer hose termination fittings.

Key Features & Benefits

• Direct Replacement: Supersedes Thetford 40540 with updated part 50389
• Designed for SmartTote™ Premium Tanks: OEM-compatible fit and function
• Double Pin Termination Adapter: Secure hose connection design
• 3-Inch Bayonet End: Compatible with standard RV sewer hose fittings
• Durable Construction: Built for long-term RV sanitation use
• Easy Installation: Quick-connect sewer hose attachment
• Black Finish: Matches OEM sanitation components

Specifications

• Part Number: 40540 (Superseded by 50389)
• Product Type: Sewer Hose Connector
• Application: SmartTote™ Premium Portable Waste Holding Tank
• Connection Type: Double Pin Termination Adapter
• Hose Connection: 3 Inch Bayonet End
• Color: Black
• Material: Durable Plastic

Fits These Models

• Thetford SmartTote™ Premium Portable Waste Holding Tanks

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 waste tank

What’s Included

• (1) Thetford 50389 Sewer Hose Connector (Replacement for 40540)

Installation Overview

1. Remove the damaged or worn sewer hose connector
2. Clean connection surfaces thoroughly
3. Attach the new adapter to the waste tank connection point
4. Secure compatible 3-inch sewer hose using bayonet fitting
5. Verify tight and leak-resistant connection

FAQs

Q: Is Thetford 50389 the same as 40540?
A: Yes—50389 is the direct replacement for the discontinued 40540.

Q: Which tanks does this fit?
A: It is designed for Thetford SmartTote™ Premium portable waste holding tanks.

Q: What size hose connection does this use?
A: This adapter uses a 3-inch bayonet sewer hose connection.

Q: What is a double pin termination adapter?
A: It is a bayonet-style connector design that helps create a secure sewer hose attachment.

Why Choose Thetford?

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