{"product_id":"microlene-20-inch-jumbo-filter-housing-high-flow","title":"Davey Microlene 20\" Jumbo Filter Housing - WaterMark Certified, High Flow, 25mm or 40mm Ports NZ","description":"\u003cp\u003eThe Davey Microlene 20\" jumbo filter housing accepts the largest cartridges available — delivering high dirt-holding capacity, strong flow rates, and longer intervals between cartridge changes. Available with 25mm (1\") or 40mm (1½\") ports to suit standard residential plumbing or larger rural and farm pipework.\u003c\/p\u003e\n\n\u003cp\u003eCertified to WaterMark WMTS-103 (Lic. 032114) and tested in compliance with AS\/NZS 4020 for use in contact with drinking water. Manufactured under ISO 9001 quality management and ISO 14001 environmental management systems.\u003c\/p\u003e\n\n\u003cp\u003eAvailable as a housing only, or with a 20\" jumbo cartridge included — select your port size and cartridge preference from the dropdowns.\u003c\/p\u003e\n\n\u003cp\u003eIncludes mounting bracket, screws, and housing spanner.\u003c\/p\u003e\n\n\u003cp\u003eBore water quality varies significantly. We recommend testing your bore water before selecting a filtration system — get in touch and we'll help you choose the right configuration for your supply.\u003c\/p\u003e\n\n\u003ch2\u003eKey specs at a glance\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eCartridge size: 20\" jumbo (114mm \/ 4.5\" diameter)\u003c\/li\u003e\n  \u003cli\u003ePorts: 25mm (1\") or 40mm (1½\") female thread — select from dropdown\u003c\/li\u003e\n  \u003cli\u003eDimensions: 620mm H × 185mm W\u003c\/li\u003e\n  \u003cli\u003eMax pressure: 880 kPa (128 psi)\u003c\/li\u003e\n  \u003cli\u003eWater temperature: 0–40°C\u003c\/li\u003e\n  \u003cli\u003eMax ambient temperature: 50°C\u003c\/li\u003e\n  \u003cli\u003eMaterial: Reinforced polypropylene\u003c\/li\u003e\n  \u003cli\u003eColour: White\u003c\/li\u003e\n  \u003cli\u003ePressure relief valve: Yes\u003c\/li\u003e\n  \u003cli\u003eWarranty: 1 year\u003c\/li\u003e\n  \u003cli\u003eWaterMark WMTS-103, Lic. 032114\u003c\/li\u003e\n  \u003cli\u003eTested to AS\/NZS 4020\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eChoosing your port size\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003e25mm (1\") ports — model W20J25MM\u003c\/strong\u003e\u003cbr\u003eSuits standard residential mains connections and most tank water pump outlets. The right choice for the majority of NZ homes.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e40mm (1½\") ports — model W20J40MM\u003c\/strong\u003e\u003cbr\u003eSuits larger pipework found on farms, lifestyle blocks, and high-flow installations where minimising flow restriction is important.\u003c\/p\u003e\n\u003cp\u003eIf you're unsure which port size matches your pipework, get in touch before ordering.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Kiwi homeowners choose Davey Microlene\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eWaterMark certified and AS\/NZS 4020 tested — verified for drinking water contact\u003c\/li\u003e\n  \u003cli\u003e20\" jumbo cartridges deliver higher dirt-holding capacity and longer service intervals than 10\" equivalents\u003c\/li\u003e\n  \u003cli\u003eTwo port size options — fits standard homes and high-flow rural installations\u003c\/li\u003e\n  \u003cli\u003ePressure relief valve for safe, clean cartridge changes\u003c\/li\u003e\n  \u003cli\u003eIncludes bracket, screws, and spanner — ready to install\u003c\/li\u003e\n  \u003cli\u003e1-year warranty backed by Davey's NZ dealer network\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhat do the certifications mean?\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWaterMark WMTS-103 (Lic. 032114):\u003c\/strong\u003e Independently tested and certified against Australian and New Zealand water industry standards for plumbing products.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAS\/NZS 4020:\u003c\/strong\u003e Tested in compliance with the standard for products used in contact with drinking water — covering materials, construction, and potential effects on water quality.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eISO 9001:\u003c\/strong\u003e The manufacturer operates a certified quality management system.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eISO 14001:\u003c\/strong\u003e The manufacturer operates a certified environmental management system.\u003c\/p\u003e\n\n\u003ch2\u003eChoosing a cartridge\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003e20 micron pleated sediment\u003c\/strong\u003e\u003cbr\u003eRemoves sand, grit, rust, and coarse particles. High flow, cleanable and reusable. A good first-stage filter for tank, rainwater, and bore supplies.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e1 micron polyspun sediment\u003c\/strong\u003e\u003cbr\u003eRemoves fine silt, dust, and rust particles. Physically blocks parasitic cysts. Ideal for polishing water or as a second stage after a coarse sediment filter.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e5 micron carbon block\u003c\/strong\u003e\u003cbr\u003eRemoves chlorine taste, odour, and organic compounds. The right choice for town supply where taste and smell are the concern.\u003c\/p\u003e\n\u003cp\u003eNot sure which cartridge suits your water? Get in touch and we'll help you choose.\u003c\/p\u003e\n\n\u003ch2\u003eFull technical specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eW20J25MM\u003c\/th\u003e\n\u003cth\u003eW20J40MM\u003c\/th\u003e\n\u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePorts\u003c\/td\u003e\n\u003ctd\u003e25mm (1\") female thread\u003c\/td\u003e\n\u003ctd\u003e40mm (1½\") female thread\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCartridge size\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e20\" jumbo (4.5\" \/ 114mm od)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eHeight\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e620mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eWidth\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e185mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMax pressure\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e880 kPa (128 psi)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eWater temperature\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e0–40°C\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMax ambient temperature\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e50°C\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003eReinforced polypropylene\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eColour\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003eWhite\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePressure relief valve\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCertifications\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003eWaterMark WMTS-103 (Lic. 032114), AS\/NZS 4020\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eQuality systems\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003eISO 9001, ISO 14001\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e1 year\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat's in the box\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × Davey Microlene 20\" jumbo filter housing (port size per selection)\u003c\/li\u003e\n  \u003cli\u003e1 × Mounting bracket and screws\u003c\/li\u003e\n  \u003cli\u003e1 × Housing spanner\u003c\/li\u003e\n  \u003cli\u003eCartridge included if selected from dropdown\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFAQ\u003c\/h2\u003e\n\n\u003ch3\u003eWhat size cartridges does this housing take?\u003c\/h3\u003e\n\u003cp\u003eIt takes 20\" jumbo cartridges — 4.5\" (114mm) outside diameter. Standard 20\" cartridges (2.5\" diameter) will not fit. If you're unsure, measure your existing cartridge's outside diameter before ordering.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's the difference between the 25mm and 40mm port options?\u003c\/h3\u003e\n\u003cp\u003eBoth housings are otherwise identical. The 25mm (1\") port suits standard residential mains and tank supply lines. The 40mm (1½\") port is for larger-diameter pipework on farms, lifestyle blocks, and high-flow installations where minimising flow restriction matters.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's the advantage of 20\" jumbo over 10\" jumbo?\u003c\/h3\u003e\n\u003cp\u003eThe 20\" cartridge holds roughly twice the media volume — more dirt-holding capacity, longer service life, and sustained flow rates over a longer period. Worth the step up for high-demand or high-sediment supplies.\u003c\/p\u003e\n\n\u003ch3\u003eWhat does WaterMark certification mean?\u003c\/h3\u003e\n\u003cp\u003eWaterMark (WMTS-103, Lic. 032114) means the housing has been independently tested and certified to meet NZ and Australian plumbing standards. It's a mandatory certification for plumbing products in NZ and Australia.\u003c\/p\u003e\n\n\u003ch3\u003eWhat does AS\/NZS 4020 mean?\u003c\/h3\u003e\n\u003cp\u003eIt means the housing has been tested for use in contact with drinking water — covering the materials used and their effect on water quality.\u003c\/p\u003e\n\n\u003ch3\u003eDoes it come with a cartridge?\u003c\/h3\u003e\n\u003cp\u003eThe housing is available with or without a cartridge. Select your preference from the dropdown — housing only, or housing with your preferred 20\" jumbo cartridge.\u003c\/p\u003e\n\n\u003ch3\u003eWhy does it have a pressure relief valve?\u003c\/h3\u003e\n\u003cp\u003eThe pressure relief valve releases pressure from the housing before you unscrew the bowl. Press it, hear the hiss, then unscrew — safe and splash-free.\u003c\/p\u003e\n\n\u003ch3\u003eHow often do I need to change the cartridge?\u003c\/h3\u003e\n\u003cp\u003eIt depends on the cartridge type and your water quality. Most cartridges are replaced every 6–12 months. A drop in flow rate or pressure is usually the first sign it's time.\u003c\/p\u003e\n\n\u003ch3\u003eDo I need a plumber to install it?\u003c\/h3\u003e\n\u003cp\u003eIt connects via standard female thread fittings. Most customers use a licensed plumber for whole-house installations. Get in touch if you're unsure what's involved for your setup.\u003c\/p\u003e\n\n\u003ch3\u003eWhat warranty applies?\u003c\/h3\u003e\n\u003cp\u003eThe housing carries a 1-year warranty. Cartridges are consumable items and are not covered by warranty, but get in touch if anything arrives damaged or defective.\u003c\/p\u003e","brand":"Davey","offers":[{"title":"25mm (1\") \/ Housing Only","offer_id":45204054868012,"sku":"W20J25MM","price":424.35,"currency_code":"NZD","in_stock":true},{"title":"25mm (1\") \/ 20 Micron Pleated","offer_id":45204054900780,"sku":"W20J25MM + 20PP20J","price":504.05,"currency_code":"NZD","in_stock":true},{"title":"25mm (1\") \/ 1 Micron Polyspun","offer_id":45204054933548,"sku":"W20J25MM + 1PS20J","price":500.83,"currency_code":"NZD","in_stock":true},{"title":"25mm (1\") \/ 5 Micron Carbon Block","offer_id":45204054966316,"sku":"W20J25MM + ACB20J","price":619.97,"currency_code":"NZD","in_stock":true},{"title":"40mm (1.5\") \/ Housing Only","offer_id":45204054999084,"sku":"W20J40MM","price":424.35,"currency_code":"NZD","in_stock":true},{"title":"40mm (1.5\") \/ 20 Micron Pleated","offer_id":45204055031852,"sku":"W20J40MM + 20PP20J","price":504.05,"currency_code":"NZD","in_stock":true},{"title":"40mm (1.5\") \/ 1 Micron Polyspun","offer_id":45204055064620,"sku":"W20J40MM + 1PS20J","price":500.83,"currency_code":"NZD","in_stock":true},{"title":"40mm (1.5\") \/ 5 Micron Carbon Block","offer_id":45204055097388,"sku":"W20J40MM + ACB20J","price":619.97,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0623\/5966\/6732\/files\/WT_W20J40MM_Housing_1200x910px-2-1024x777_png.webp?v=1749946633","url":"https:\/\/www.filtrationstation.co.nz\/products\/microlene-20-inch-jumbo-filter-housing-high-flow","provider":"Filtration Station NZ","version":"1.0","type":"link"}