FUSCH Heater Hose Connector 2-Pack 3/4in x 5/8in Aluminium with Stainless Clamps & O-Rings

FUSCH 2-piece aluminum heater hose connector replaces OEM plastic inlet/outlet fittings (3/4" x 5/8") to restore a secure coolant connection at the heater core.

This pair of heater hose connectors is a direct-fit aftermarket replacement designed for vehicles that originally used plastic fittings. Machined from anodized aluminium and paired with stainless-steel clamps and spare O-rings, the kit aims to offer improved durability and corrosion resistance over the OE plastic parts while keeping installation straightforward for home mechanics and professional techs alike.

How do these connectors improve over the original plastic fittings?

The FUSCH connectors use a high-hardness aluminium alloy with anodic oxidation on the surface, which increases resistance to corrosion and wear compared to the original plastic parts. Each fitting ships with stainless-steel clamps and 304-grade hardware to reduce the chance of rust at the hose connection.

• Anodized aluminium bodies for higher surface hardness and corrosion resistance.
• 304 stainless-steel clamps included to minimize rust formation.
• Supplied O-rings and spring clips for improved sealing reliability.

Which vehicles and part numbers are these connectors compatible with?

This kit is offered as a replacement for several GM and other models that commonly use the 3/4" inlet x 5/8" outlet heater core tube size. It lists multiple OEM replaceable part numbers so you can confirm fitment before purchasing.

• Listed replacement numbers: 15032062, 15151875, 800-409HP, 800409HP, 800409.
• Common applications: Chevy Silverado, GMC Sierra, GMC Yukon, Cadillac Escalade, Chevrolet Suburban, and select Ford and Lincoln models.
• Always verify against your vehicle year and original part number for correct match.

What comes in the package and what tools are provided?

The kit includes everything needed to complete a basic heater hose connector swap, reducing the need to source clamps or O-rings separately. Two disassembly tools are included for the two tube diameters to ease removal of the old fittings.

• 2× aluminium heater hose connectors with 4 O-rings.
• 2× spring clips and 2× stainless-steel clamps for secure hose attachment.
• 2× disassembly tools sized 5/8" and 3/4" to help remove old fittings cleanly.

How difficult is installation and what should I watch for?

Installation is generally straightforward: push one end onto the heater core tube, attach the coolant hose to the other end, then secure with the supplied clamp or spring clip. Basic hand tools and a clean work area are sufficient, but take care to seat the O-rings fully and avoid overtightening clamps.

• Install with clean coolant lines and inspect O-rings for proper seating.
• Hand-tighten clamps evenly; avoid crushing the hose or cutting the O-ring.
• Refill and pressure-test cooling system after installation to check for leaks.

Who is this for: This FUSCH aluminium heater hose connector kit is intended for owners and technicians replacing worn or cracked heater core inlet/outlet fittings on compatible Chevy, GMC, Cadillac and select Ford/Lincoln models. It suits DIYers who prefer a more corrosion-resistant metal replacement over OEM plastic parts and shops that want a ready-to-install kit including clamps, O-rings and removal tools.