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Dorman 800-403 HVAC Heater Hose Connector for Select Models

Q: What is the id of the connector / od of the pipe it fits?

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"?

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?

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..

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.

4.5/5

Product ID: 302297644

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Details

Size
1 Count (Pack
Material
Metal Alloy
Brand
Dorman
Item dimensions L x W x H
4.87 x 1.87 x
Connector Type
Hose Connector
Thread Size
0.375 inches

Frequently Bought Together

Dorman 800-403 Heater Hose Connector Compatible with Select Models

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Description

Dorman 800-403 HVAC Heater Hose Connector for Select Models

Specifications

Size	1 Count (Pack of 1)
Material	Metal Alloy
Brand	Dorman
Item dimensions L x W x H	4.87 x 1.87 x 1.25 inches
Connector Type	Hose Connector
Thread Size	0.375 inches
Exterior Finish	Ready To Paint If Needed
Thread Type	NPT
Item Weight	0.01 Ounces
Number of Pieces	1
Global Trade Identification Number	00019495026389
Manufacturer	Dorman Products
UPC	019495026389
Part Number	800-403
Item Weight	0.01 ounces
Product Dimensions	4.87 x 1.87 x 1.25 inches
Country of Origin	Taiwan
Item model number	800-403
Is Discontinued By Manufacturer	No
Item Package Quantity	1
Batteries Included?	No
Batteries Required?	No
Warranty Description	Limited Lifetime Warranty

Have a Question? See What Others Asked

What is the id of the connector / od of the pipe it fits?

I wan to replace my heater hose too. What size heater hose do I use with this? Is it 3/4"?

Do you need 2 of these?

Got a 98 Expedition 5.4l. Couldn't get them off, now I can't get them back on.. any help out there appreciated..

Common Questions

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TrustScore 4.5 | 7,300+ reviews

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

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The MOLLE sheath is of exceptional quality. Very happy with my purchase.

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