Tapered Rubber Expansion Plug 40mm | Pool Pipe Plug | NEJ-601-91000

Quick answer: The Tapered Rubber Expansion Plug (40mm) is a tapered rubber plug with a stainless steel wing-nut that expands to create a watertight seal inside pool pressure pipes. Tighten the wing-nut to expand the rubber and lock it in place — no tools required. The 40mm plug suits pipe internal diameters of 34mm–48mm.

Common Uses

• Sealing the main drain in a pool skimmer box
• Blocking off pipes when servicing equipment below water level
• Isolating a pipe run to test whether it is the source of pool water loss
• Temporarily capping unused pipe ends during plumbing work

Key Features

• Tapered rubber body — expands to grip the pipe wall when the wing-nut is tightened
• Stainless steel wing-nut and plate — corrosion-resistant, hand-tighten only
• Suits 34mm–48mm internal pipe diameter
• No tools required — reusable and durable in pool chemical environments

Specifications

• SKU: NEJ-601-91000
• Nominal size: 40mm
• Pipe internal diameter range: 34mm–48mm
• Material: Rubber body, stainless steel wing-nut and plate

Need a different size?

• 25mm (22mm–35mm pipe)
• 32mm (30mm–40mm pipe)
• 40mm (34mm–48mm pipe) — You’re in the right place.
• 50mm (48mm–62mm pipe)