AES4 4" Aluminium Expanding Pipe Stoppers

AES4 Aluminium Expanding Pipe Stopper is a durable, expandable test plug designed for temporary sealing of pipe ends in welding, fabrication, and industrial piping applications. Made from aluminium with a natural rubber tyre, this lightweight tool effectively blocks water, gases, and debris ingress during installation, repairs, or testing, fitting pipes with internal diameters from 3.50" to 4.33" (89-110 mm, 4" nominal). Ideal for arduous duties like chemical immersion or higher temperatures, it conforms to British Standard BS8005 for low-pressure testing and sealing.

• Model Number: AES4
• Product Type: Aluminium Expanding Pipe Stopper
• Color: Silver (aluminium)
• Material: Aluminium body with natural rubber tyre (ring)
• Nominal Pipe Size: 4" / 100 mm
• Internal Diameter Range (I/D): 3.50" - 4.33" / 89 mm - 110 mm
• Minimum Insertion into Pipe: 2.1" / 53 mm
• Overall Length: 3.94" / 100 mm
• Diameter of Waterway: 0.5"
• Maximum Allowable Back Pressure: 15 psi / 1 bar
• Temperature Resistance: Up to 194°F / 90°C (suitable for arduous duties including chemical immersion)
• Weight (Net): 1 lb / 0.41 kg
• Overview: Expandable test plug for purging and general pipe blocking; seals ends of pipes or openings for testing; ideal for water, gas, debris blocking in new or repaired pipework
• Key Features:
  • Expandable design: Central spindle with two plates and rubber tyre; wing nut compresses tyre for seal
  • Arduous duty suitable: For long immersion in water, higher temperatures, acidic/alkaline contact
  • Versatility: Hollow shaft version for hose connections or nipple caps; conforms to BS8005
  • Durability: Aluminium construction resists corrosion; reusable
  • Safety: Low pressure testing; easy insertion/removal
• Packaging: 1 Stopper per Unit; Includes wing nut and tyre; Compact packaging
• Storage: Cool, dry place; indefinite shelf life
• Compliance: BS8005 for low pressure testing and sealing