spotting drills

NWZ water pipeline spotting drill for PVC and PE pipes

  • Type 1300
  • Working pressure PN16
  • Gate valve grey cast iron GJL 250
  • Clamp ductile cast iron GJS 500-7
  • Diameters DN90 – DN160
  • Outlets 40mm, 50mm
  • Temp. max. 40°C – for water

NWZ water supply spottting drill for PVC and PE pipes is mainly used in water supply systems to drill under pressure using a drilling jig and coated with the best quality epoxy resin anti-corrosion coatings.


National Hygiene Institute Warsaw.


Threaded connection acc. to PN-EN 228-1.
Requirements and tests according to PN-EN 1074 – 1 and 2


  • Drilling under pressure using a drilling machine.
  • Foot integrated with threaded gate valve cat.-no. 2630, 2640. 2630, 2640.
  • Outlets with threads G11/2″ and G2″.
  • Can be assembled on PVC and PE pipes.
  • Full, smooth, equal-flow and cavity-free passage.
  • Sealing of the stem with three o-rings.
  • Body and cover made of grey cast iron EN-GJL 250.
  • Foot with internal thread and clamp made of ductile cast iron EN-GJS 500-7 lined with rubber.
  • Stainless steel stem with cold rolled thread.
  • Wedge suspension nut on the stem – non-replaceable, made of brass, hot-dipped in the wedge of the gate valve.
  • Wedge made of spheroidal cast iron, vulcanized inside and outside with EPDM rubber with hardness of 70±5°Sh.
  • Bolts connecting the cover to the body – blind threads, fully protected against corrosion with paraffin-wax compound.
  • Internal and external corrosion protection by epoxy powder paint RAL 5005 with a thickness of min. Epoxy powder paint RAL 5005 with minimum thickness 250μm and 3kV resistance.