---
product_id: 11885772
title: "Dorman 800-403 Heater Hose Connector"
brand: "dorman"
price: "€ 18.36"
currency: EUR
in_stock: true
category: "Dorman"
url: https://www.desertcart.ie/products/11885772-dorman-800-403-heater-hose-connector
store_origin: IE
region: Ireland
---

# Precision metal alloy build Pressure-tested reliability Exact OE fit & function Dorman 800-403 Heater Hose Connector

**Brand:** dorman
**Price:** € 18.36
**Availability:** ✅ In Stock

## Summary

> 🔧 Upgrade your ride with leak-free confidence!

## Quick Answers

- **What is this?** Dorman 800-403 Heater Hose Connector by dorman
- **How much does it cost?** € 18.36 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/11885772-dorman-800-403-heater-hose-connector)

## Best For

- dorman enthusiasts

## Why This Product

- Trusted dorman brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Built to Last:** Durable metal alloy ensures leak-free, long-term performance
- • **Trusted Legacy:** Backed by over 100 years of Dorman’s automotive expertise
- • **Tested Under Pressure:** Rigorously pressure-tested to guarantee dependable operation
- • **Fit-Verified Confidence:** Use the garage tool to confirm perfect fit for your vehicle
- • **Engineered for Perfection:** Seamlessly matches original equipment for flawless integration

## Overview

The Dorman 800-403 Heater Hose Connector is a precision-engineered, metal alloy replacement part designed to match the fit and function of original equipment. Pressure-tested for durability and backed by over a century of Dorman’s automotive expertise, it ensures leak-free performance and reliable operation. Perfectly fit-verified for select vehicle models, this connector offers a hassle-free upgrade with a limited lifetime warranty.

## Description

Made of quality materials, this HVAC heater hose connector matches the fit and function of an original equipment connector to restore leak-free performance.

## Features

- Quality replacement - this heater hose connector matches the fit and function of the original equipment connector
- Durable construction - this heater hose connector is made of quality materials for a precise fit and leak-free durability
- Century of experience - for over 100 years, Dorman Products has provided quality automotive replacement parts to its customers
- Performance tested - this connector has been rigorously pressure tested to ensure reliable performance
- Ensure fit - Input your vehicle into the garage tool and check Confirmed Fit bar at the top of the page. If there is an “i” in a blue circle, additional verification is needed. Please hover over the "i" to verify fitment notes match your vehicle.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000CIR1QQ |
| Best Sellers Rank | #58,884 in Automotive ( See Top 100 in Automotive ) #20 in Automotive Replacement Heater Hose Connectors |
| Brand | Dorman |
| Brand Name | Dorman |
| Connector Type | Hose Connector |
| Customer Reviews | 4.6 out of 5 stars 839 Reviews |
| Exterior Finish | Per Item Description |
| Global Trade Identification Number | 00019495026389 |
| Included Components | Per Item Description |
| Item Dimensions | 4.87 x 1.87 x 1.25 inches |
| Item Highlight | Fits Select Models |
| Item Weight | 0.27 g |
| Item dimensions L x W x H | 4.87 x 1.87 x 1.25 inches |
| Manufacturer | Dorman Products |
| Manufacturer Part Number | 800-403 |
| Manufacturer Warranty Description | Limited Lifetime Warranty |
| Material | Metal Alloy |
| Material Type | Metal Alloy |
| Model Number | 800-403 |
| Number of Pieces | 1 |
| Part Interchange Info | E69Z 18D435-A, 15119175, 15139564 |
| Size | 1 Count (Pack of 1) |
| Thread Size | 0.375 inches |
| Thread Type | NPT |
| UPC | 019495026389 |
| Unit Count | 1 Count |

## Product Details

- **Brand:** Dorman
- **Connector Type:** Hose Connector
- **Exterior Finish:** Ready To Paint If Needed
- **Item Weight:** 0.01 Ounces
- **Item dimensions L x W x H:** 4.87 x 1.87 x 1.25 inches
- **Material:** Metal Alloy
- **Number of Pieces:** 1
- **Size:** 1 Count (Pack of 1)
- **Thread Size:** 0.375 inches
- **Thread Type:** NPT

## Images

![Dorman 800-403 Heater Hose Connector - Image 1](https://m.media-amazon.com/images/I/71Ih3h7872L.jpg)
![Dorman 800-403 Heater Hose Connector - Image 2](https://m.media-amazon.com/images/I/61Zfh6JnaKL.jpg)
![Dorman 800-403 Heater Hose Connector - Image 3](https://m.media-amazon.com/images/I/618u7n8ijKL.jpg)
![Dorman 800-403 Heater Hose Connector - Image 4](https://m.media-amazon.com/images/I/71g10mdfv0L.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: What is the id of the connector / od of the pipe it fits?**
A: This is for use with 5/8" on both the ID and OD

**Q: I wan to replace my heater hose too.  What size heater hose do I use with this?  Is it 3/4"?**
A: In my experience the size has to do with the size of the pipe coming out of the heater.  So the size used depends on the heater core used.  In my case is was 3/4 for the heater core but 5/8 for the heater interconnecting pipe.  Or in short you won't know still you take it off.  But if it is the original heater core you could try and see what Amazon tells you.  Amazon was correct on mine.  Buy two Quick Connects and replace both.  If one broke the other is not far behind.

**Q: Do you need 2 of these?**
A: It would depend on the size of the lines you are working on and also if you need to replace them all.

**Q: Got a 98 Expedition 5.4l. Couldn't get them off, now I can't get them back on.. any help out there appreciated..**
A: I broke the original connectors removing the hoses from the metal tubes that protrude from firewall. I cut off the old connectors and replaced them with the dorman 800-403 connector with a clamp. At first the new connectors would not push onto the metal tubes, so I smeared a dab of tune up grease on the metal tubes and the connectors pushed right on and clicked. no leaks - worked great.

## Frequently Bought Together

- Dorman 800-403 Heater Hose Connector Compatible with Select Models
- Dorman 800-414CD Heater Hose Connector Compatible with Select Cadillac / Chevrolet / GMC Models
- Dorman 800-413CD Heater Hose Connector Compatible with Select Cadillac / Chevrolet / GMC Models

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*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-09-12*