FloPlast SP11 40mm Rubber Boss Reducer | 1.5″ Waste to 62mm Soil Pipe Boss

FloPlast SP11 40mm Rubber Boss Reducer | 1.5″ Waste to 62mm Soil Pipe Boss

Features

This genuine FloPlast 40mm rubber boss reducer is a trade-quality waste system adapter engineered to connect a standard internal waste line to an external soil stack. Designed to fit perfectly into a 62mm soil pipe boss entry point, this push-fit rubber insert accepts 40-43mm (1.5″) waste pipes and provides a secure, flexible, and completely air-tight push-fit seal.

• Universally compatible with FloPlast, Polypipe, and other popular soil pipe brands
• Precisely reduces a 62mm soil pipe boss entry point down to a standard 40mm opening
• Flexible rubber construction accommodates standard waste pipes measuring 40mm to 43mm
• Simple push-fit installation creates an instant watertight and odour-proof connection

Technical

• Brand: FloPlast
• Part Number: SP11
• Component Type: Push-Fit Rubber Waste Boss Reducer Insert
• Outer Diameter Size: 62mm (To fit standard soil pipe boss openings)
• Inner Diameter Size: 40mm (Accommodates 40mm to 43mm / 1.5″ waste pipework)
• Material Base: High-Grade, Detergent-Resistant Synthetic Rubber
• Connection Type: Friction Fit / Push-Fit Compression Seal

Details

Connecting a small 1.5″ waste pipe directly into a wide soil stack boss opening leaves a massive gap that rigid plastic adapters cannot always seal tightly. Consequently, sewer gases and foul smells escape past the joint, which quickly ruins the air quality inside your bathroom or utility room. Furthermore, if your waste pipe shifts slightly due to hot water expansion, unyielding connections often distort. As a result, dirty wastewater begins to drip behind your wall panels, which creates hidden mould growth.

Fortunately, installing this FloPlast 40mm rubber boss reducer eliminates these odour and leakage frustrations completely. Because the high-grade rubber body inserts directly into a 62mm boss opening, it creates a flexible barrier that absorbs pipe movement without losing its grip. Additionally, since the inner collar stretches seamlessly to fit 40mm to 43mm waste pipes, it forms an instant, airtight seal without requiring messy solvent cement. Therefore, you successfully secure a fast, reliable, and professional connection that blocks sewer drafts entirely.