Clay Drainage Jointing Instructions

Prior to Jointing

  • Check the pipes and fittings to ensure that they have not suffered damage
  • Ensure that the pipe ends, jointing components and lubricant are clean and free from grit, before attempting to make joint

Densleeve Pipes & Fittings DN100 and DN150 assemblies

  1. Stand the pipe upright on a firm clean base (a 600mm piece of wood is ideal) and lubricate the top end of the pipe paying particular attention to the chamfered leadin portion.
  2. Push the sleeve coupling over the lubricated chamfered end of the pipe and ensure that the pipe end is firmly located against the central register of the coupling. The end of any fitting may be pushed into the sleeve coupling – the reverse of the procedure adopted for pipes.
  3. Ensure that the sleeve coupling on the previously laid pipe is thoroughly cleaned and free from grit or small stones from the bedding material.
  4. Lower new pipe into trench and check, clean and lubricate the free end. Place the pipe end into the mouth of the previously laid coupling and align the pipe along the central axis of the pipeline. Apply a horizontal forward pressure, in combination with a small side to side movement, and push the pipe home into the sleeve coupling.

Densleeve Pipes & Fittings DN200 and above

  1. Lower the pipe into the trench using slings and set in position on the prepared bedding. Form coupling recess in the bedding.
  2. Lubricate the pipe end to be jointed. Centralise a sleeve coupling to the pipe end and push home. A bar may be used against a timber block.
  3. Lower the next pipe into the trench and lubricate the end to be jointed, Ensure that the coupling on the previously laid pipe is thoroughly clean and free from grit or stones. Centralise the pipe and push fully home into the coupling. A bar may be used against a timber block. Ensure coupling recess is filled with bedding material after making the joint.

Denline/Denduct Pipes & Fittings

  1. Introduce the chamfered, plain end of a duct into the sleeve coupling fitted on the end of the previously laid duct.
  2. Push the duct straight home against the central register of the coupling.

No lubricant or special jointing material is necessary.

Cut Pipes can be jointed by similar means

All Naylor pipes can easily be cut to accurate length with a disc blade power tool (safety precautions such as goggles, dust mask, etc should be worn). It is essential that sharp edges are removed from cut pipes to provide a satisfactory ‘lead-in’ for the rubber seals on sleeve couplings. This can be achieved by rasping, using a trimming tool or a light hammer