4lb Classic Radiator Pressure Cap – Short Reach 20mm

Product Description

This 4lb classic radiator pressure cap is a short reach design specifically intended for radiator filler necks with a 19mm internal depth. It is ideal for classic and vintage vehicles where a standard or long-reach cap would not seat correctly.

The cap features a zinc-coated steel case for corrosion resistance and a traditional winged profile with embossed safety markings. Each unit is assembled in England (UK) and calibrated to a 4lb pressure rating, ensuring dependable cooling system pressure control.

Key Features

• 15lb pressure rating
• Short reach configuration
• Designed for 19mm internal filler neck depth
• 20mm spring length
• Zinc-coated steel case
• Classic wing-style design with period-correct appearance
• Made and assembled in England (UK)

Technical Specifications

Fitment Notes

• Suitable only for radiator filler necks with an internal depth of approximately 19mm
• Not suitable for deep-neck or long-reach radiators
• Always confirm pressure requirements against the vehicle manufacturer’s specification

What’s Included

• 1 × 4lb short reach classic radiator pressure cap