Image Credits
Plant and spare-part photographs sourced from Wikimedia Commons under free licences.
The following images are used to illustrate water treatment plants and spares across this website. Each is reproduced under the licence shown; select a title to view the original file, author and full licence terms. Images may have been resized or cropped.
Calderas 1.jpgoriginal work by User:Yrithinnd; facelift by ChNPP · CC BY 2.5
Activated Carbon Filters.pngVentrovert · CC BY 4.0
Industrial cooling tower.jpgCASEPL · CC BY-SA 4.0
Instalacja demineralizacji wody.jpgAdam Marek Kłosiński · CC0
Water Treatment Plant in India.jpgApex Ecotech Private Limited · CC BY-SA 4.0
Effluent Water treatment plant at MIDC.jpegbk kartik21 · Public domain
Membrane bioreactor (MBR) (5984836730).jpgSuSanA Secretariat · CC BY 2.0
Industrial Water Treatment Plants.jpgApex Ecotech Private Limited · CC BY-SA 4.0
West Basin WRF Carson CA.jpgU.S. EPA · Public domain
Reverse Osmosis Plant.JPGBlueye · CC BY-SA 3.0
Reverse osmosis desalination plant.JPGJames Grellier · CC BY-SA 3.0
Water softener.jpgరవిచంద్ర · CC BY-SA 4.0
Aeration tank activated sludge process STP Bengaluru India.jpgVraj Acharya, WELL Labs · CC BY-SA 4.0
Wastewater UF membrane system, Aquabio.jpgAquabio Ltd. · CC BY-SA 3.0
Bag filter.jpgTetris L · Public domain
Ball valve--The-Alloy-Valve-Stockist.JPGHeather Smith · CC BY 3.0
Butterfly-valve--The-Alloy-Valve-Stockist.JPGHeather Smith · CC BY 3.0
Membrane filter in housing.jpgAgne27 · CC BY-SA 3.0
Conductivity meter.jpgSarathkumaran Ranganathan · CC BY-SA 4.0
ExposedCopperCoupon.jpgRobertgutter · CC BY-SA 4.0
Diaphragm valve.jpgPalagiri · CC BY-SA 4.0
Image-DiscDiffuser.JPGTom Frankel, SSI Aeration, Inc. · CC BY-SA 3.0
Milton Roy's Primeroyal X Chemical Metering Pump.jpgLaurelBloch · CC BY-SA 4.0
Cooling Tower Fill Material.jpgSAF · CC BY-SA 4.0
Diemme Filtration Filter Press in Poland 2.jpgPeter Craven · CC BY 2.0
Flanged forged carbon steel gate valve.jpgHeather Smith · CC BY 3.0
Pressure Gauge.jpgIn Transit · CC BY-SA 4.0
Super-duplex-valve-globe-valves.jpgHeather Smith · CC BY-SA 3.0
The different layers of a filter used at drinking water facilities.jpgU.S. Environmental Protection Agency · Public domain
Reverse osmosis membrane element layers.jpgDavid Shankbone · CC BY 3.0
Electrical Control Panel Made By True Logic Group Inc.jpgJbarnard33 · CC BY 4.0
PH meter.jpgSarathkumaran Ranganathan · CC BY-SA 4.0
RKB V vertical multistage pumps.jpgMukund275 · CC BY-SA 3.0
Ion exchange resin beads.jpgBugman at English Wikipedia · Public domain
Flow-tube-meter hg.jpgHannes Grobe · CC BY-SA 3.0
A Single Cartridge Seal.jpgGordonSBuck · CC BY-SA 4.0
Y strainer cross section.jpgPalagiri · CC BY-SA 4.0
Tds-meter.jpgSpotless property · CC BY-SA 3.0
Hach Classroom Drinking Water Testing Kit 2006.526 open.jpgStaff photographer · CC BY-SA 3.0
Lamella clarifier installation.jpgTube-settler · CC BY-SA 4.0
Steam Boiler at VITM.jpgAnup Sadi · CC BY-SA 4.0
BGSU Heating Plant Interior.jpgMbrickn · CC BY-SA 4.0
Kewanee Fire-Tube Package Boiler.jpgGarrett F. · CC BY-SA 3.0
Fire tube boiler at the Jabalpur Engineering College.jpgJbl87 · CC BY-SA 4.0
Fire tube steam boiler bahan bakar Gas LPG dan Solar winsketel.jpgDiemareng · CC BY-SA 4.0
Water Tube Steam Boiler.jpgDiemareng · CC BY-SA 4.0
Steam Boiler.jpgAbanoub Gabra · CC BY-SA 4.0
313kgh Complete Skid Mounted Steam Boiler Package.jpgSteamboilers · CC BY-SA 4.0
Seattle Steam Company biomass boiler 01.jpgJoe Mabel · CC BY-SA 3.0
Viessmann Vertomat Condensing Boiler.JPGDunnd74 at English Wikipedia · CC BY 2.5
2026 Centralna Ciepłownia w Kłodzku (06).jpgJacek Halicki · CC BY-SA 4.0
Induced Draft Cooling Tower for HVAC.jpgAloofmanish · CC BY-SA 4.0
Cooling tower at BASF antwerp.JPGAlf van Beem · CC0
Industrial Counterflow Cooling Towers.jpgPerfectvinod · CC BY-SA 4.0
Package type cooling tower.JPGIlanbar6 · CC BY-SA 4.0
Cenk Endustri Field Erected Industrial Cooling Tower.JPGCenk Endustri · CC BY-SA 3.0
Cenk Endustri Field Erected Cooling Tower.JPGCenk Endustri · CC BY-SA 3.0
Open loop Cooling Tower for DG Set.jpgAloofmanish · CC BY-SA 4.0
Package Type Induced Draft Counter Flow Cooling Towers.jpgCenk Endustri · CC BY-SA 3.0
Induced Draught Cooling Tower.jpgAloofmanish · CC0
Cooling towers at Queensland’ hospital 01.jpgKgbo · CC BY-SA 4.0
Torre evaporativa Evapco.jpgAir fans · CC BY-SA 4.0
Cooling tower - showers.jpgJan Beránek · CC BY-SA 4.0
Gatineau paper mill effluent treatment plant.JPGÓðinn · CC BY-SA 2.5 ca
Effluent weir Viikinmäki Wastewater Treatment Plant.jpgAntti Leppänen · CC BY 4.0
Industrial water treatment for Ostrow Wielkopolski in Rabczyn.jpgStiopa · CC BY-SA 3.0
Aerated treatment lagoon at the AV Nackawic pulp mill.jpgQuintin Soloviev · CC BY 4.0



Doddabommasandra Lake STP Bengaluru sewage treatment plant aerial view India.jpgVraj Acharya, WELL Labs · CC BY-SA 4.0
Wastewater Clarifiers.jpgRoen Wainscoat · CC BY-SA 4.0
Sedimentation tank.jpgMADe · CC BY 3.0
Verbandskläranlage Hof 20250106 HOF0646 RAW-Export.pngPantheraLeo1359531 · CC BY 4.0
Verbandskläranlage Hof 20250106 HOF0602 RAW-Export.pngPantheraLeo1359531 · CC BY 4.0
Verbandskläranlage Hof 20250106 HOF0522 RAW-Export.pngPantheraLeo1359531 · CC BY 4.0
Gresham Wastewater Treatment Plant secondary clarifiers 2025.jpgPortlandAppraisalBlog · CC BY-SA 4.0
Oczyszczalnia ścieków w Białymstoku (Składowa) 1.jpgHenryk Borawski · CC BY-SA 3.0
A 1000 liter reverse osmosis plant for commercial use.jpgVishalsh521 · CC BY-SA 3.0
RO Plant.jpgWatercareservice · CC BY-SA 4.0
Reverse Osmosis Skid.jpgsirdle · CC BY-SA 2.0
Malta - Pembroke - Triq il-Fortizza - Reverse Osmosis Plant 01 ies.jpgFrank Vincentz · CC BY-SA 3.0
Backwashing in a water filtration plant.JPGZ22 · CC BY-SA 4.0
Slow sand filter room.jpgZ22 · CC BY-SA 3.0
ZeeWeed 500 ultrafiltration module at a NEWater plant.jpgZ22 · CC BY-SA 4.0
Ultrafiltration system at Bedok NEWater Factory.jpgZ22 · CC BY-SA 4.0
MBR plant for dairy production.jpgWehrle Werk AG · CC BY-SA 4.0
Jeyranbatan UF Water Treatment Plant.jpgLifekey23 · CC BY-SA 4.0
Gotha Stadtbad Ultrafiltration.JPGBenreis · CC BY 3.0
Safety valve-01.jpg© 2009 K. Krallis, SV1XV · CC BY-SA 3.0
Coale safety valve 141-R.jpgDidier Duforest · CC BY-SA 4.0
Cologne Germany Bopp&Reutter-Safety-Relief-Valve-01.jpgCEphoto, Uwe Aranas · CC BY-SA 3.0
QSMM Boiler feed pump 2607c.JPGClem Rutter, Rochester, Kent. · CC BY 3.0
Zantingh Gas-Olie brander.JPGHoogvlieth · CC BY-SA 4.0
Zantingh Brander.JPGZantingh B.V. · CC BY-SA 4.0
Boiler tubes 2 Hove eng - Flickr - Elsie esq..jpgLes Chatfield from Brighton, England · CC BY 2.0
Vesilasijahanat.jpgKari Jokinen · CC BY-SA 3.0
Swing Check valves.JPGHeather Smith · CC BY 3.0
Check-valve--The-Alloy-Valve-Stockist-pressure-seal-bonnet.JPGHeather Smith · CC BY 3.0
Cooling tower fan.jpgSteve Johnson from Valparaiso Indiana, USA · CC BY 2.0
Beneath Cooling Tower.jpgTJBlackwell · CC BY 3.0
Multiple reducer gears.JPGJohnscotaus · CC BY-SA 4.0
Pressure relief valve DN25 on cooling water.jpgRomanM82 · CC BY-SA 4.0
Closed cooling water system pumps and its pipe connections.jpgHarald the Bard · CC BY-SA 4.0
Reverse osmosis membrane coil.jpgDavid Shankbone · CC BY 3.0
Wickelmodule für die RO.JPGPeter in s · Public domain
Membrane filter without housing.jpgAgne27 · CC BY-SA 3.0
High pressure pump 20 kW.jpgHammelmann Oelde · CC BY-SA 3.0
High pressure pump 70 kW.jpgHammelmann Oelde · CC BY-SA 3.0
High pressure pump 250 kW.jpgHammelmann Oelde · CC BY-SA 3.0
Alat Cleaning Membrane Reverse Osmosis.jpgmapurnautama · CC BY-SA 4.0
Techfluid-CG34-2500.jpg© 2010 K. Krallis (SV1XV) · CC BY-SA 3.0 gr
Rotameter.jpgOwn work · Public domain
Solenoid valve 2019.jpgToT89 · CC BY-SA 4.0
Coriolis Flow Meter.jpgBitjungle · CC BY-SA 4.0
Diemme Filtration Filter Press in Poland 1.jpgPeter Craven · CC BY 2.0
Diemme Filtration Filter Press cloth pack.jpgPeter Craven · CC BY 2.0
Filter press (6322212987).jpgPeter Craven · CC BY 2.0
Belt filter press - Blue Plains WWTP - 2016.jpgMoreau1 · Public domain
Fully-automated-filter-press-for-fly-ash-washing.jpgStTaAQUA · CC BY-SA 4.0
LMI's EXCEL XR, Chemical Metering Pump.jpgLaurelBloch · CC BY-SA 4.0
Milton Roy's Global mRoy Metering Pump.jpgLaurelBloch · CC BY-SA 4.0
Milton Roy's Primeroyal N Triplex Metering Pump.jpgLaurelBloch · CC BY-SA 4.0
Sera Metering pumps C409-410.2.jpgMcFly211 · CC BY-SA 4.0
Grobrechen - bar screen (12358976435).jpgSuSanA Secretariat · CC BY 2.0
Submersible pump 0.75HP.jpgMar11 · CC BY-SA 4.0
Submersible pump in action.jpgKemikungen · CC BY 3.0
Submersible pump 30-07-2012.JPGJoydeep · CC BY-SA 3.0
Warman centrifugal pump.jpgBernard S. Janse · CC BY 2.5
Centrifugal Pump.jpgSaud · CC BY-SA 4.0
Wafer check valve--The-Alloy-Valve-Stockist.JPGHeather Smith · CC BY 3.0
Flanged-Nozzle-check-valve-The-Alloy-Valve-Stockist.JPGHeather Smith · CC BY 3.0
1 In Steam Globe Valve Parts 2019.jpgMairi Dulaney · CC BY-SA 4.0
Globe Control Valve.jpgBitjungle · CC BY-SA 4.0
Pressure gauges.jpgBitjungle · CC BY-SA 4.0
UV-Entkeimungsanlage.jpgDMdsW · CC0
CO2 Degassing&UV Sterilizer Tower.jpgFish Helper · CC BY-SA 4.0
Industrial instruments pressure gauge.jpgPalagiri · CC BY-SA 3.0
Membrane pump, polypropylene, 2016-10, pic01.jpgRoman Mifek · CC BY-SA 4.0
Floating level switch.JPGS.J. de Waard · CC BY 2.5
Aerated treatment lagoon at the AV Nackawic pulp mill.jpgQuintin Soloviev · CC BY 4.0
Reverse osmosis desalination plant.JPGJames Grellier · CC BY-SA 3.0
Fire tube steam boiler bahan bakar Gas LPG dan Solar winsketel.jpgDiemareng · CC BY-SA 4.0
Package Type Induced Draft Counter Flow Cooling Towers.jpgCenk Endustri · CC BY-SA 3.0
Jeyranbatan UF Water Treatment Plant.jpgLifekey23 · CC BY-SA 4.0