Thetford 21065 (Superseded by 50528) Cassette Flush Bellows – SC4 Toilet Replacement Part - SPECIAL ORDER

Product Overview

The Thetford 21065 Cassette Flush Bellows (now superseded by 50528) is a direct replacement flush component designed for Thetford SC4 cassette toilets. This bellows assembly helps restore proper manual flushing operation by generating the pressure needed to move water into the bowl during flushing.

Ideal for replacing worn, cracked, or leaking bellows components, this OEM replacement helps maintain smooth and reliable toilet operation.

Special Order Item

• Estimated Lead Time: 2–3 Weeks
• Return Policy: This is a special order item and cannot be returned once ordered.

Key Features & Benefits

• Direct Replacement: Supersedes Thetford 21065 with updated part 50528
• Restores Flush Performance: Helps return proper water flow during flushing
• Designed for SC4 Toilets: OEM-compatible fit and function
• Manual Flush Operation: Essential component for manual flush systems
• Durable Construction: Built for long-lasting RV use
• Easy Replacement: Direct-fit replacement for worn bellows assemblies

Specifications

• Part Number: 21065 (Superseded by 50528)
• Product Type: Cassette Flush Bellows
• Flush Type: Manual Flush
• Toilet Compatibility: Thetford SC4 Cassette Toilets
• Material: Durable Rubber & Plastic Components

Fits These Models

• Thetford SC4 Cassette Toilets

Common Issues This Part Solves

• Weak or inconsistent flushing
• Cracked or leaking flush bellows
• Difficulty generating flush pressure
• Manual flush mechanism failure

What’s Included

• (1) Thetford 50528 Cassette Flush Bellows (Replacement for 21065)

Installation Overview

1. Turn off water supply to the toilet
2. Access the flush bellows assembly
3. Remove the worn or damaged bellows
4. Install the new replacement bellows
5. Test flushing operation for proper pressure and flow

FAQs

Q: Is Thetford 50528 the same as 21065?
A: Yes—50528 is the direct replacement for the discontinued 21065.

Q: What does the flush bellows do?
A: The bellows creates the pressure needed for manual flushing operation.

Q: Will this fit all Thetford cassette toilets?
A: No, it is specifically designed for SC4 cassette toilet models.

Q: What are signs of a bad flush bellows?
A: Common symptoms include weak flushing, leaking, cracking, or failure to move water properly.

Why Choose Thetford?

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