spotting drills

NWZ water pipeline spotting drill for cast iron and AC pipes

  • Type 1200/1400
  • Working pressure PN16
  • Gate valve grey cast iron GJL 250
  • Clamp stainless steel
  • Diameters DN80 – DN300
  • Outlets 40mm, 50mm
  • Temp. max. 40°C – for water

NWZ water supply spotting drill for cast iron, steel and asbestos cement pipes mainly used in water supply systems to drill under pressure with drilling apparatus and coated with 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.
  • Universal foot design for two diameter ranges DN80-100 and DN150-300.
  • Outlets with threads G11/2″ and G2″.
  • Can be installed on steel, cast iron and AC 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 made of ductile cast iron grade EN-GJS 500-7.
  • Stainless steel clamp lined with rubber, stainless steel forged bolts with rolled thread.
  • 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.
  • Foot gasket with trapezoidal cross section made of EPDM rubber, other seals made of NBR rubber.
  • 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.