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Diamond Wire Cutting at Briars Nose Pumping Station in Headington, Oxford

Dean and Dyball

RequirementsDean & Dyball

  • Cut and isolate 2 sections of cast iron water pipe.
  • Pipe 450mm in diameter.
  • Section 1 located in 3 metre deep trench.
  • Section 2 located inside enclosed pumping chamber.
  • Cutting equipment to be operated remotely.
  • All operatives to be ‘Confined Spaces’ certified.
  • Strict adherence to water industry safety regulations.
  • Operations to be undertaken alongside other contractors.
  • Work to be completed within a fixed 4 hour period.



  • Use of 2 hydro stress wire saws with hydraulic power packs and autonomous three phase generators.
  • Equipment tested and positioned prior to water supply being turned off.
  • Diamond wire saw operated and powered remotely.
  • Cutting equipment not affected by residual water in pipe.
  • Standby machinery available on site.

Key Benefits

  • Demolition robot operated remotely negating operative hand and arm vibration issues.Dean & Dyball
  • Brokk’s ‘rock mast’ drilling attachment used to reduce vibrations on air bridge.
  • Concrete debris removed and recycled.


  • Project completed before temporary water reserves depleted ensuring Oxford’s water supply remained uninterrupted.
  • Specialist equipment owned and operated by Castle and Pryor ensuring fixed costs and qualified, experienced operators.


  • Pipe severed without water fully drained thus saving approximately 2 hours.
  • Equipment set up without having to cease pumping.
  • Immediate cutting undertaken once water pumping had ceased.
  • Completed within time frame allocated.
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