Dometic Vacuum Switch Kit - RV Toilet - Fits 300/310/320 Series - Part# 385311436

DometicSKU: 385311436
Added to catalog: March 10, 2026
Last in stock: Apr 5, 2026

Sale price$197.99
|
In stock (30 units), ready to be shipped
FREE Delivery Estimate April 22 – April 25
1-Hour Cancellation Window

1-Hour Cancellation Window

You'll have 1 hour after placing your order to update your shipping address or cancel completely.

After that, we begin coordinating with our vendors to fulfill your order — at that point, cancellations and address changes usually aren't possible.

If you're unsure about anything, please reach out before ordering or cancel within the window.

The Dometic Vacuum Switch Kit is a critical component for maintaining proper operation of your RV's Dometic toilet system. This switch detects vacuum levels in your waste tank and signals the toilet's flushing mechanism to function correctly. If your toilet isn't flushing or you're experiencing weak flushing performance, a faulty vacuum switch is often the culprit.

Key Features

  • Genuine OEM Dometic replacement part—ensures exact fit and compatibility
  • Fits Dometic 300, 310, and 320 series toilet models
  • Vacuum-sensing design maintains proper tank pressure monitoring
  • Direct replacement—no modifications or adapters required
  • Reliable performance in harsh RV waste tank environments
  • Restores full flushing power to your Dometic toilet system

Technical Specifications

Specification Detail
Part Number 385311436
Manufacturer Dometic
Compatibility Dometic 300, 310, 320 Series Toilets
Component Type Vacuum Switch Assembly
Function Tank Vacuum Level Detection
Installation Direct Replacement

Frequently Asked Questions

Q: How do I know if my vacuum switch needs replacement?

A: Common signs include weak or no flushing action, gurgling sounds from the toilet, or the toilet not responding when you press the flush button. If your Dometic 300/310/320 series toilet exhibits these symptoms, the vacuum switch is often the issue.

Q: Is this a difficult part to install?

A: Installation is straightforward for most RV owners. The switch connects directly to your existing toilet assembly with no special tools required. Consult your Dometic toilet manual for exact placement and connection points specific to your model.

Q: Will this work with my older Dometic toilet?

A: This vacuum switch kit is specifically engineered for Dometic 300, 310, and 320 series toilets. Verify your toilet model number before ordering to ensure compatibility. If you're unsure of your model, contact our expert support team.

Why Elkhart RV Parts

We specialize in hard-to-find Dometic RV replacement parts that keep your system running smoothly. Shipping directly from Elkhart, Indiana—the RV capital of the world—we stock genuine OEM parts and provide expert support to help you get the exact component you need. When your RV toilet needs attention, trust the specialists who understand your equipment.

100% Authentic OEM Parts

Factory-Fresh OEM Parts — the same brands installed in new RVs straight from Elkhart. Genuine, name-brand components made to order — never generic, never outdated. Sourced directly from the original RV manufacturers for perfect fit and factory-level quality.

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