Dometic Machined Head Tank Kit - Fits 28HTS - Part# 385400028

DometicSKU: 385400028
Added to catalog: March 10, 2026
Last product update: June 6, 2026 at 12:47 AM

Sale price$1,220.63 Regular price$1,940.80
| Found it cheaper? Get an answer in seconds.
FREE Delivery Estimate August 3 – August 11
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.

Action Required: Please read & accept before ordering

The Dometic Machined Head Tank Kit is a precision-engineered replacement component for your Dometic 28HTS holding tank system. This kit restores proper waste water containment and system integrity, making it essential for RV owners experiencing tank leaks, cracks, or deterioration. If your RV's waste management system isn't holding water or you're noticing odors around the tank area, this OEM-spec replacement kit is the solution you need.

Key Features

  • Machined head design ensures precise fit and reliable sealing
  • OEM Dometic specification for 28HTS holding tank systems
  • Durable construction built to withstand RV waste system demands
  • Direct replacement — no modifications required
  • Prevents leaks and odor issues common in aging tanks
  • Complete kit includes all necessary components for installation

Technical Specifications

Specification Details
Part Number 385400028
Compatibility Dometic 28HTS Holding Tank
Component Type Machined Head Tank Kit
Manufacturer Dometic

Frequently Asked Questions

Q: How do I know if my tank head needs replacement?
A: Signs include visible cracks or damage to the tank head, persistent leaks around the tank area, sewage odors that won't go away despite cleaning, or water pooling under your RV near the waste tank. If your tank is over 10 years old and showing any of these symptoms, replacement is recommended.

Q: Will this kit fit my specific RV model?
A: This kit is designed specifically for Dometic 28HTS holding tank systems. Verify your tank model number before ordering. If you're unsure, check your RV's waste system documentation or contact our expert support team with your RV's year and model.

Q: Is professional installation required?
A: While many experienced RV owners can handle this replacement, tank work can be messy. We recommend consulting your RV's service manual or having a professional technician perform the installation to ensure proper sealing and system integrity.

Why Choose Elkhart RV Parts

We specialize in hard-to-find Dometic replacement parts that keep your RV systems running smoothly. Shipping directly from Elkhart, Indiana — the RV capital of the world — we stock genuine OEM Dometic components and provide expert support to help you identify and install the exact part your RV needs. When you need it right, order from Elkhart RV Parts.

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.

You may also like

Recently viewed