{"product_id":"hydro-guard-hdg-45-reverse-osmosis-system","title":"Hydro Guard HDG-45 4-Stage Underbench Reverse Osmosis System","description":"\u003ch2\u003ePremium 4-Stage Reverse Osmosis Drinking Water System for NZ Homes\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eHydro Guard HDG-45\u003c\/strong\u003e is a compact 4-stage reverse osmosis system designed to provide high-quality filtered drinking water from a dedicated tap at your kitchen bench.\u003c\/p\u003e\n\u003cp\u003eCombining sediment filtration, activated carbon and reverse osmosis technology, the HDG-45 reduces dissolved salts and a wide range of contaminants that standard carbon filtration alone cannot remove.\u003c\/p\u003e\n\u003cp\u003eThe system includes a \u003cstrong\u003e50 GPD reverse osmosis membrane, pressurised storage tank, dedicated drinking water tap and Hydro Guard Quick \u0026amp; Easy™ replacement cartridges\u003c\/strong\u003e, making it an excellent choice for everyday drinking and cooking water.\u003c\/p\u003e\n\u003cp\u003eFor customers who prefer remineralised RO water, the system can also be upgraded with an \u003cstrong\u003eadditional alkaline remineralisation cartridge\u003c\/strong\u003e, creating a \u003cstrong\u003e5-stage RO + Alkaline system\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eIdeal for:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eDrinking water\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCooking\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eTea and coffee\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eFridge water connections\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIce makers\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eWhy Choose the Hydro Guard HDG-45?\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e4-stage reverse osmosis filtration\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e50 GPD RO membrane – approximately 190 litres per day nominal production\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e4.5 US gallon pressurised storage tank\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eQuick \u0026amp; Easy™ sanitary replacement cartridges\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDedicated lead-free drinking water tap\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eFLOWLOK™ leak protection\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSHOK BLOK™ pressure protection\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCompact underbench design\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eStraightforward ongoing servicing\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eOptional \u003cstrong\u003e5th-stage alkaline remineralisation filter\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e3-year limited manufacturer warranty\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003e4-Stage Reverse Osmosis Filtration\u003c\/h2\u003e\n\u003ch3\u003eStage 1 – 5 Micron Sediment Filter\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eHDG-SED5 sediment cartridge\u003c\/strong\u003e removes dirt, rust and fine suspended particles from the incoming water.\u003c\/p\u003e\n\u003cp\u003eThis protects the downstream carbon cartridge and RO membrane and helps maintain reliable system performance.\u003c\/p\u003e\n\u003ch3\u003eStage 2 – 5 Micron Carbon Block\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eHDG-CB5 carbon block cartridge\u003c\/strong\u003e reduces chlorine, unpleasant taste and odour before the water reaches the RO membrane.\u003c\/p\u003e\n\u003cp\u003eRemoving chlorine at this stage also helps protect the RO membrane from premature damage.\u003c\/p\u003e\n\u003ch3\u003eStage 3 – 50 GPD Reverse Osmosis Membrane\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eHDG-TW50 reverse osmosis membrane\u003c\/strong\u003e is the main purification stage.\u003c\/p\u003e\n\u003cp\u003eWater is forced through a fine semi-permeable membrane which substantially reduces dissolved salts and many contaminants that pass through conventional sediment and carbon filtration.\u003c\/p\u003e\n\u003cp\u003eThe membrane is rated at:\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e50 US gallons per day – approximately 190 litres per day\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eActual production will vary depending on incoming water pressure, water temperature and feed water quality.\u003c\/p\u003e\n\u003cp\u003eReverse osmosis can help reduce contaminants including:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eDissolved salts\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSodium\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eNitrates\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eLead\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eArsenic\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCysts including Giardia and Cryptosporidium\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eOther dissolved contaminants\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eStage 4 – Carbon Polishing Filter\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eHDG-CB5P carbon polishing cartridge\u003c\/strong\u003e provides the final treatment stage on the standard HDG-45 system.\u003c\/p\u003e\n\u003cp\u003eRO water stored in the pressure tank passes through this cartridge before reaching the drinking water tap, helping provide clean, fresh-tasting water.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eOptional 5th-Stage Alkaline Upgrade\u003c\/h2\u003e\n\u003cp\u003eFor customers who prefer remineralised RO water, the HDG-45 can be supplied with an \u003cstrong\u003eadditional alkaline remineralisation cartridge\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eThe alkaline filter is installed \u003cstrong\u003eafter the standard four filtration stages\u003c\/strong\u003e and does not replace the carbon polishing cartridge.\u003c\/p\u003e\n\u003ch3\u003eStandard HDG-45\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e4 filtration stages:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSediment → Carbon Block → RO Membrane → Carbon Polishing\u003c\/p\u003e\n\u003ch3\u003eHDG-45 + Alkaline Upgrade\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e5 filtration stages:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSediment → Carbon Block → RO Membrane → Carbon Polishing → \u003cstrong\u003eAlkaline Remineralisation\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eReverse osmosis removes a very high proportion of dissolved minerals from the incoming water. The additional alkaline cartridge allows the purified water to pass through mineral media before reaching the drinking water tap.\u003c\/p\u003e\n\u003ch3\u003eBenefits of the Alkaline Upgrade\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eAdds selected minerals back into RO water\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCan increase the pH of the final drinking water\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eProvides a more mineralised taste\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eRetains the standard carbon polishing stage\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eInstalled as an additional final treatment stage\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eEasy to replace during routine servicing\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eChoose Your System\u003c\/h2\u003e\n\u003ch3\u003eStandard HDG-45 – 4 Stage\u003c\/h3\u003e\n\u003cp\u003eIncludes:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e5 micron sediment filter\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e5 micron carbon block\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e50 GPD RO membrane\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCarbon polishing filter\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePressurised storage tank\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDedicated drinking water tap\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eHDG-45 + Alkaline – 5 Stage\u003c\/h3\u003e\n\u003cp\u003eIncludes everything supplied with the standard HDG-45 plus:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eAdditional alkaline remineralisation cartridge\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis option is ideal for customers who want the contaminant reduction benefits of reverse osmosis while adding selected minerals back into the final drinking water.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eQuick \u0026amp; Easy™ Filter Changes\u003c\/h2\u003e\n\u003cp\u003eThe HDG-45 uses Hydro Guard’s \u003cstrong\u003eQuick \u0026amp; Easy™ cartridge system\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eUnlike traditional filter housings, the complete cartridge is removed and replaced during servicing.\u003c\/p\u003e\n\u003cp\u003eBenefits include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eQuick filter changes\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCleaner and more hygienic servicing\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eNo filter housing spanner required\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eLess chance of water spills under the bench\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eNo need to handle the internal filter media\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eBuilt-In Leak Protection\u003c\/h2\u003e\n\u003ch3\u003eFLOWLOK™ Leak Shut-Off\u003c\/h3\u003e\n\u003cp\u003eThe HDG-45 includes Hydro Guard’s \u003cstrong\u003eFLOWLOK™ leak detection system\u003c\/strong\u003e, providing an additional level of protection should water be detected around the filtration unit.\u003c\/p\u003e\n\u003ch3\u003eSHOK BLOK™ Protection Valve\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eSHOK BLOK™ valve\u003c\/strong\u003e helps protect the filtration system from pressure shock within the incoming water supply.\u003c\/p\u003e\n\u003cp\u003eThese features provide additional peace of mind for permanent underbench installations.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003ePressurised Storage Tank\u003c\/h2\u003e\n\u003cp\u003eReverse osmosis systems produce purified water gradually, so the HDG-45 includes a \u003cstrong\u003e4.5 US gallon pressurised storage tank\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eFiltered water is stored ready for use, providing a practical flow rate from the drinking water tap whenever required.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eDedicated Drinking Water Tap\u003c\/h2\u003e\n\u003cp\u003eThe HDG-45 is supplied with a separate lead-free drinking water tap for installation through the kitchen bench or sink.\u003c\/p\u003e\n\u003cp\u003eThis keeps your filtered drinking water separate from your normal kitchen mixer.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eCompact Underbench Design\u003c\/h2\u003e\n\u003cp\u003eThe HDG-45 is designed to fit neatly into most kitchen cupboards.\u003c\/p\u003e\n\u003ch3\u003eFilter Unit Dimensions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eHeight:\u003c\/strong\u003e 381 mm\u003cbr\u003e\u003cstrong\u003eLength:\u003c\/strong\u003e 371 mm\u003cbr\u003e\u003cstrong\u003eWidth:\u003c\/strong\u003e 117 mm\u003c\/p\u003e\n\u003cp\u003eIts narrow design helps minimise the amount of cupboard space taken up by the filtration unit.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eReplacement Filters\u003c\/h2\u003e\n\u003cp\u003eReplacement filters are available individually, making ongoing servicing of your Hydro Guard HDG-45 straightforward.\u003c\/p\u003e\n\u003ch3\u003eHDG-SED5 – 5 Micron Sediment Filter\u003c\/h3\u003e\n\u003cp\u003eRemoves dirt, rust and fine sediment from the incoming water.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eShop HDG-SED5 Replacement Filter\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003eHDG-CB5 – 5 Micron Carbon Block\u003c\/h3\u003e\n\u003cp\u003eReduces chlorine, unpleasant taste and odour while helping protect the RO membrane.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eShop HDG-CB5 Replacement Filter\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003eHDG-TW50 – 50 GPD RO Membrane\u003c\/h3\u003e\n\u003cp\u003eThe main reverse osmosis membrane responsible for reducing dissolved salts and other contaminants.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eShop HDG-TW50 Replacement RO Membrane\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003eHDG-CB5P – Carbon Polishing Filter\u003c\/h3\u003e\n\u003cp\u003eProvides final taste and odour polishing before the water reaches the drinking water tap.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eShop HDG-CB5P Replacement Filter\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003eAlkaline Replacement Cartridge\u003c\/h3\u003e\n\u003cp\u003eFor systems fitted with the optional 5th-stage alkaline upgrade.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eShop Alkaline Replacement Filter\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eReplacement Filter Sets\u003c\/h2\u003e\n\u003cp\u003eFor easier routine servicing, replacement cartridges can also be supplied as a \u003cstrong\u003eHydro Guard HDG-45 service kit\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eThe RO membrane generally has a longer service life than the sediment and carbon cartridges, so it can be replaced separately when required.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eActual replacement intervals will depend on incoming water quality and water usage.\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eSuitable Applications\u003c\/h2\u003e\n\u003cp\u003eThe Hydro Guard HDG-45 is ideal for:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eNZ homes\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eTown and mains water supplies\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDrinking and cooking water\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eTea and coffee\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eFridge water connections\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIce makers\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHomes with elevated dissolved mineral levels\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCustomers wanting greater contaminant reduction than standard carbon filtration\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCustomers wanting the option of remineralised RO water\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eProduct Specifications\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eBrand:\u003c\/strong\u003e Hydro Guard\u003cbr\u003e\u003cstrong\u003eModel:\u003c\/strong\u003e HDG-45\u003cbr\u003e\u003cstrong\u003eSystem type:\u003c\/strong\u003e Underbench reverse osmosis\u003cbr\u003e\u003cstrong\u003eStandard filtration stages:\u003c\/strong\u003e 4\u003cbr\u003e\u003cstrong\u003eWith alkaline upgrade:\u003c\/strong\u003e 5 stages\u003cbr\u003e\u003cstrong\u003eRO membrane:\u003c\/strong\u003e 50 GPD\u003cbr\u003e\u003cstrong\u003eNominal membrane production:\u003c\/strong\u003e Approx. 190 L\/day\u003cbr\u003e\u003cstrong\u003eStorage tank:\u003c\/strong\u003e 4.5 US gallon\u003cbr\u003e\u003cstrong\u003eSediment filtration:\u003c\/strong\u003e 5 micron\u003cbr\u003e\u003cstrong\u003eCarbon prefilter:\u003c\/strong\u003e 5 micron carbon block\u003cbr\u003e\u003cstrong\u003eFinal standard filtration:\u003c\/strong\u003e Carbon polishing cartridge\u003cbr\u003e\u003cstrong\u003eOptional final stage:\u003c\/strong\u003e Alkaline remineralisation cartridge\u003cbr\u003e\u003cstrong\u003eInstallation:\u003c\/strong\u003e Underbench\u003cbr\u003e\u003cstrong\u003eOutlet:\u003c\/strong\u003e Dedicated drinking water tap\u003cbr\u003e\u003cstrong\u003eCartridge system:\u003c\/strong\u003e Hydro Guard Quick \u0026amp; Easy™\u003cbr\u003e\u003cstrong\u003eLeak protection:\u003c\/strong\u003e FLOWLOK™\u003cbr\u003e\u003cstrong\u003ePressure protection:\u003c\/strong\u003e SHOK BLOK™\u003cbr\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e 3-year limited manufacturer warranty\u003c\/p\u003e\n\u003ch3\u003eSystem Dimensions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e381 mm high × 371 mm long × 117 mm wide\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eImportant Installation Information\u003c\/h2\u003e\n\u003cp\u003eThe quoted 190 litres per day is the nominal production rating of the RO membrane.\u003c\/p\u003e\n\u003cp\u003eActual water production will vary depending on:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eIncoming water pressure\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWater temperature\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIncoming TDS\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eOverall feed water quality\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor \u003cstrong\u003ebore, tank or rainwater supplies\u003c\/strong\u003e, we recommend having the water tested before selecting a drinking water treatment system. Additional filtration or UV disinfection may be required depending on the water source.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Hydro Guard","offers":[{"title":"Standard 4 Stage System","offer_id":41930343481481,"sku":"HDGT-RO-4","price":700.5,"currency_code":"NZD","in_stock":true},{"title":"5 Stage System with added Alkaline Post Filter","offer_id":41930343514249,"sku":"HDGT-RO-4+ALK","price":817.71,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0584\/7633\/1145\/files\/HDGT-RO-4.png?v=1787772208","url":"https:\/\/www.waterfiltersonline.co.nz\/products\/hydro-guard-hdg-45-reverse-osmosis-system","provider":"Water Filters Online Aotearoa","version":"1.0","type":"link"}