Type 25 Water Hose - Radiator Feed Pipe To Bleeder Valve - 1900cc Waterboxer

This replacement rubber coolant hose is designed for VW Type 25 buses fitted with 1900cc petrol Waterboxer engines manufactured before January 1985. It connects the plastic coolant bleeder valve to the metal feed pipe leading to the radiator, forming a crucial part of the early Waterboxer cooling and bleed circuit.

On early 1.9 Waterboxer engines, this hose carries coolant away from the bleeder valve into the main radiator feed pipe, allowing trapped air to be purged from the system and ensuring steady coolant circulation. Because it sits at a key junction in the cooling system, any deterioration—such as cracking, swelling, or hardening—can quickly result in coolant leaks or persistent air locks.

Manufactured from high-quality NBR fabric-reinforced rubber, this hose is formed to the exact original shape and specification, guaranteeing correct routing, secure sealing, and long service life even under constant heat and pressure.

What this hose does and how it works

As coolant circulates through the engine, air naturally rises to high points in the system. The bleeder valve allows this air to escape, and this hose then carries coolant onward to the radiator feed pipe. A sound hose here is essential for:

• Effective bleeding of the cooling system

• Stable coolant pressure

• Consistent engine operating temperatures

Fitment

• Vehicle: VW Type 25 / T3

• Engines: 1900cc petrol Waterboxer

• Production: Vehicles built before January 1985

• Application: Plastic bleeder valve to metal radiator feed pipe

Designed specifically for early 1.9 Waterboxer cooling layouts

Quality

• NBR fabric-reinforced rubber

• OE-correct moulded profile

• Resistant to heat, pressure, and coolant chemicals

Fitting notes / related checks

• Inspect the plastic bleeder valve for cracks or brittleness

• Check the metal radiator feed pipe for corrosion at the hose seat

• Always renew hose clips if corroded

• Refill with the correct coolant and bleed the system thoroughly after fitting

A vital early-model cooling hose that helps keep your pre-1985 1.9 Waterboxer Type 25 properly bled, leak-free, and running at the correct temperature.