SES4 4" Steel Expanding Pipe Stoppers

The SES4 Steel Expanding Pipe Stopper is a robust, expandable test plug designed for temporary sealing of pipe ends in demanding welding, fabrication, and industrial piping applications. Constructed from steel with a natural rubber tyre for enhanced durability, this lightweight tool effectively blocks water, gases, and debris during installation, repairs, or testing, fitting pipes with internal diameters from 3.70" to 4.25" (94-108 mm, 4" nominal). Ideal for heavy-duty applications like prolonged immersion, elevated temperatures up to 194°F (90°C), or contact with acidic/alkaline environments, it conforms to British Standard BS8005 for low-pressure testing and sealing.

• Model Number: SES4
• Product Type: Steel Expanding Pipe Stopper
• Color: Silver (steel)
• Material: Steel body with natural rubber tyre (ring)
• Nominal Pipe Size: 4" / 100 mm
• Internal Diameter Range (I/D): 3.70" - 4.25" / 94 mm - 108 mm
• Minimum Insertion into Pipe: 1.48" / 37.5 mm
• Overall Length: 3.28" / 83.3 mm
• Diameter of Waterway: ½"
• Maximum Allowable Back Pressure: 10 psi / 0.7 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: Steel construction resists corrosion and wear; 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