AES21 21" Aluminium Expanding Pipe Stoppers

AES21 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 19.48" to 21.65" (495-550 mm, 21" 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: AES21
• Product Type: Aluminium Expanding Pipe Stopper
• Color: Silver (aluminium)
• Material: Aluminium body with natural rubber tyre (ring)
• Nominal Pipe Size: 21" / 525 mm
• Internal Diameter Range (I/D): 19.48" - 21.65" / 495 mm - 550 mm
• Minimum Insertion into Pipe: 5.7" / 145 mm
• Overall Length: 10.04" / 255 mm
• Diameter of Waterway: 2"
• Maximum Allowable Back Pressure: 3 psi / 0.2 bar
• Temperature Resistance: Up to 194°F / 90°C (suitable for arduous duties including chemical immersion)
• Weight (Net): 24 lbs / 11.3 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