The Dometic M-Pump Diaphragm Kit is an essential replacement component for VacuFlush toilet systems. When your RV's vacuum toilet isn't flushing properly or the pump is losing suction, a worn diaphragm is often the culprit. This OEM kit restores reliable flushing performance and prevents sewage backup issues.

Key Features

• Genuine OEM Dometic replacement diaphragm for M-Pump vacuum systems
• Restores proper suction and flushing action in VacuFlush toilets
• Includes all necessary components for complete pump rebuild
• Compatible with Dometic vacuum toilet systems using M-Pump technology
• Direct replacement—no modifications required
• Prevents costly system failures and sewage leaks

Technical Specifications

Part Number	385311822
Manufacturer	Dometic
System Type	VacuFlush Toilet M-Pump
Component	Diaphragm Kit
Installation	Direct OEM Replacement

Frequently Asked Questions

How do I know if my M-Pump diaphragm needs replacement?

Signs include weak or no flushing action, hissing sounds from the toilet, loss of vacuum pressure, or sewage backup. If your VacuFlush toilet is struggling to flush despite a full holding tank, the diaphragm is likely worn out.

Is this a complete kit or just the diaphragm?

This is a complete M-Pump Diaphragm Kit that includes all seals and components needed to rebuild the pump. It's designed as a comprehensive replacement to restore full functionality.

Can I install this myself?

Yes, most RV owners can replace the diaphragm kit with basic tools. However, if you're unfamiliar with your VacuFlush system, we recommend consulting your Dometic manual or contacting our support team for guidance.

Why Elkhart RV Parts

We specialize in hard-to-find Dometic replacement parts and ship directly from Elkhart, Indiana—the RV capital of the world. Every part is genuine OEM stock, and our expert support team is ready to help you identify and install the exact component your VacuFlush system needs.