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Cast Iron Radiator Reducer 1 1/4″ → 1/2″ BSP

$11.79 on Amazon.com (as of October 17, 2026, 8:15 AM EST) View details ↗

Upgrade your plumbing or radiator system with this **right-hand thread cast iron reducing bush**, designed to seamlessly connect **1 1/4″ (40mm) to 1/2″ (20mm) BSP fittings**. Crafted from **durable cast iron**, this reducer delivers **high-pressure resistance** and long-term reliability, making it ideal for both residential and commercial applications. Whether you're working with radiators, piping systems, or industrial setups, this **BSP-threaded adapter** ensures a secure, leak-proof connection while simplifying size transitions.

The **right-hand thread** ensures compatibility with standard BSP fittings, while its **heavy-duty construction** resists corrosion and wear, even in demanding environments. Fits **1.5″ (40mm) holes** with an inner diameter of **3/4″ (20mm)**, providing a precise, snug fit for professional-grade installations. Trust LT Easiyl for a **versatile, high-performance solution** that meets the needs of plumbing and HVAC systems alike.

Thread TypeRight-Hand BSP (BSP Parallel)
Size Reduction1 1/4″ (40mm) → 1/2″ (20mm) BSP
MaterialCast Iron
Outer Hole Fit~1 1/2″ (40mm)
Inner Diameter3/4″ (20mm)
ApplicationRadiators, piping, industrial/commercial systems
Is this reducer suitable for high-pressure plumbing systems?
Yes, its **cast iron construction** is designed to handle high-pressure environments, making it ideal for radiators and industrial piping.
What type of thread does this reducer use?
It features a **right-hand BSP (BSP Parallel) thread**, ensuring compatibility with standard BSP fittings.
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