Traditionally, cast iron penstocks have been supplied to meet the needs of the world's water industries, offering robust construction and unprecedented service life.

Modern trends are moving towards the versatility of fabricated penstocks. Since almost all penstocks are unique fabricated penstocks can be individually designed to suit each specific application.

Penstocks New Zealand utilises finite element analysis to ensure that the most cost effective design and material selection is offered, consistent with safe working loads, performance, configuration and lowest delivered price.


Penstocks - Case Studies

  • Kaituna River Diversion Project
    • Project:Kaituna River Diversion Project
    • Client:J Swap Contractors
    • Year:2019
    • During 2019, Penstocks New Zealand (PNZ), a subsidiary company of Service Engineers Ltd, were involved in the Kaituna River Diversion Project. This project is designed to increase fresh water flows from the Kaituna River into the Maketu Estuary to improve
  • Grafton Gully - SQID Tank
    • Project:Grafton Gully - SQID Tank
    • Client:Auckland Motorway Alliance
    • Year:2013
    • Auckland Motorway Alliance contracted Service Engineers Limited to fabricate and install a Penstock in the Grafton Gully SQID Tank. In this contract, SEL's role was to supply a Penstock in Marine Grade Aluminium - supplied with frames, stainless steel rising
  • Orakei Basin Sluice Gates
    • Project:Orakei Basin Sluice Gates
    • Client:Auckland City Council
    • Year:2010
    • The main contract was to renew the Orakei Basin Sluice Gates and as main contractor, Service Engineers Limited sub-contracted Coastline Construction Group Limited for construction work, and Current Electrical for the electrical works.   The scope of the contract was
  • Timaru WWTP upgrade - Penstocks
    • Project:Timaru WWTP upgrade - Penstocks
    • Client:Timaru District Council
    • Year:2012
    • Timaru District Council has designated a program of works, encompassing several different projects to achieve separation and treatment of industrial and domestic waste water flows. As part of this program, the Main Trunk Sewer Renewal has provided the necessary infrastructure

Penstocks - Gallery