A genuine Thetford OEM yellow vent button designed for Thetford SC234 and C200 cassette toilets. This small but essential component releases internal air pressure from the waste-holding tank, ensuring smooth and splash-free emptying.

If your vent button is missing, stiff, or leaking, this genuine replacement restores proper pressure relief and easy tank emptying.

Part Number: 0752478

Colour: Yellow

Material: High-strength ABS plastic

Function: Vent pressure release button

Kit Includes: 1 × Yellow vent button

Compatability: 

• Fits Thetford SC234 and C200 series cassette toilets

• Suits both manual and electric flush models

Frequently Asked Questions 

Q: What does this button do?
The vent button releases air pressure inside the waste tank while you’re emptying it. Pressing it allows the contents to flow out smoothly and prevents “glugging” or splashing.

Q: Can I fit this myself?
Yes ,  installation is very simple:

1. Remove the old vent button and any residue.

2. Push the new button assembly into the vent hole.

3. Ensure it moves freely when pressed.
   No tools or adhesives are needed.

Q: Does this part come with a spring or seal?
Yes, the button includes an integrated sealing edge and spring mechanism. It’s a complete replacement for the original button.

Q: Will this fit my C250 or C260 toilet?
No , this yellow vent button is for C200 and SC234 models only.