derwent coupling fitting instructions

Installation Instructions.

• Step 1:

  • Ensure pipe is clean and free of damage where coupling is to be located. The condition of the pipe can aect the sealing capabilities of the coupling.

• Step 2:​

  • Ensure the rubber ring is lubricated and slides freely on the sleeve surface. Use approved RRJ lubricant if not appropriately lubricated.​

• Step 3:

  • Align the pipes and mark reference lines on the pipe to ensure pipe ends are central in the coupling.

• Step 4:

  • ​Fit the coupling onto one of the pipes being used.​

• Step 5

  • Locate the pipe to be joined into position, ensuring the correct gap is achieved and that the pipes are properly aligned. (See table recommended pipe gaps.)

• Step 6

  • Position the coupling centrally over the pipe ends.​

• Step 7

  • While tightening the nuts check that coupling is still properly aligned and pipe is located centrally in the coupling. Evenly tighten nuts to keep coupling aligned. Do not tighten one side excessively as this will cause alignment issues.​

• Step 8

  • Tension nuts to the required torque (which is printed on the coupling).​

• Step 9

  • After approximately 30 minutes tension nuts again as rubber may have compressed.