Dometic Toilet Tank Vent Cap Kit - Fits TW Series - Part# 385310699

DometicSKU: 385310699
Added to catalog: March 11, 2026

Sale price$469.69
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Sold out
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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.

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The Dometic Toilet Tank Vent Cap Kit prevents odors, insects, and debris from entering your RV's waste tank system. This essential vent component fits Dometic TW Series toilets and maintains proper tank ventilation while protecting your plumbing system from external contaminants.

Key Features

  • Prevents odor backup and unpleasant smells from entering your RV
  • Blocks insects and debris from entering the waste tank
  • Maintains proper tank ventilation and pressure balance
  • OEM Dometic replacement part for TW Series toilets
  • Easy installation on existing vent lines
  • Durable construction designed for RV environments

Technical Specifications

Specification Details
Part Number 385310699
Fits Models Dometic TW Series Toilets
Component Type Toilet Tank Vent Cap Kit
Function Odor and debris prevention
Condition New OEM

Frequently Asked Questions

Q: Why is my RV toilet smelling even though the tank isn't full?

A: A failing or missing vent cap allows sewer gases to escape into your RV. This Dometic vent cap kit seals the vent line properly, preventing odors from backing up into your living space.

Q: Will this kit work on my older Dometic TW toilet?

A: Yes, this is a genuine OEM Dometic part designed for TW Series toilets. If you're unsure about your specific model, contact our expert support team with your toilet's serial number.

Q: How often should I replace the vent cap?

A: Under normal use, a vent cap lasts several years. Replace it if you notice increased odors, visible cracks, or if insects are getting into your tank. Inspect it annually during RV maintenance.

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, and our expert support team can help you identify the exact component you need for your RV toilet system.

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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