Dometic 340634 Impeller Pump 3.5" - Fresh Water System - Part# 340634

DometicSKU: 340634
Added to catalog: March 11, 2026

Sale price$740.48
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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 340634 impeller pump is the heart of your RV's fresh water delivery system. This 3.5-inch pump circulates water from your holding tank to faucets, showers, and appliances throughout your motorhome or travel trailer. If water flow is weak or nonexistent, a worn impeller is often the culprit—replacing it restores normal pressure and performance.

  • 3.5-inch impeller design for reliable water circulation
  • Direct replacement for original Dometic water pump systems
  • Handles standard RV fresh water system pressures
  • Compatible with 12-volt DC water pump assemblies
  • OEM Dometic part ensures proper fit and performance
  • Essential maintenance item for aging RV water systems
Specification Detail
Part Number 340634
Impeller Size 3.5 inches
Application Dometic Fresh Water Pump Systems
System Type 12-Volt DC Water Delivery
OEM Status Genuine Dometic Original Equipment

Frequently Asked Questions

Q: How do I know if my impeller pump needs replacement?
A: Signs include reduced water pressure at faucets, no water flow despite a running pump motor, or water spurting inconsistently. If your pump runs but delivers little to no water, the impeller blades are likely worn or damaged.

Q: Will this impeller fit my specific RV model?
A: This 340634 impeller is designed for Dometic fresh water pump assemblies. Verify your current pump model matches Dometic's specifications before ordering. Contact our expert support team with your RV make/model and current pump part number for confirmation.

Q: Is this a difficult replacement?
A: Impeller replacement typically requires removing the pump assembly and accessing the pump head. Difficulty varies by RV model and pump location. Many owners handle this as a DIY maintenance task, though professional service is always an option.

Why Elkhart RV Parts

We specialize in hard-to-find Dometic replacement parts for RV owners who need exact OEM components. Shipping directly from Elkhart, Indiana—the RV capital of the world—we stock genuine Dometic parts and provide expert support to help you identify and install the right component for your 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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