{"product_id":"microlene-20-inch-jumbo-twin-filter-kit-as20j","title":"Davey Microlene 20\" Jumbo Twin Filter Housing - WaterMark Certified, High Flow, Dual Stage NZ","description":"\u003cp\u003eThe Davey Microlene AS20J is a dual-stage 20\" jumbo filter housing built for large homes, lifestyle blocks, and high-demand supplies. Running two 20\" jumbo cartridges in sequence, it delivers high dirt-holding capacity and strong flow rates — up to 155 lpm — with very little pressure loss across the system.\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 cartridges matched to your water source — select from the dropdown.\u003c\/p\u003e\n\n\u003cp\u003eIncludes housing spanner and bracket fixings.\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\") female BSP\u003c\/li\u003e\n  \u003cli\u003eDimensions: 717mm H × 410mm W\u003c\/li\u003e\n  \u003cli\u003eRecommended max flow: 155 lpm\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: Glass reinforced polypropylene\u003c\/li\u003e\n  \u003cli\u003ePressure relief valves: Yes (both bowls)\u003c\/li\u003e\n  \u003cli\u003eWarranty: 1 year (housing)\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\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 roughly twice the dirt-holding capacity and service life of 10\" equivalents\u003c\/li\u003e\n  \u003cli\u003e155 lpm flow rate — handles whole-house demand on large properties without pressure drop\u003c\/li\u003e\n  \u003cli\u003eGlass reinforced polypropylene construction — built for demanding conditions\u003c\/li\u003e\n  \u003cli\u003ePressure relief valves on both bowls for safe, easy cartridge changes\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 your variant\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHousing only (AS20J)\u003c\/strong\u003e\u003cbr\u003eBoth bowls ship empty. Choose this if you want to specify your own cartridge combination, or if you're replacing an existing housing.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eRainwater and tank water kit (KAS20J) — for tank, rainwater, and bore supplies\u003c\/strong\u003e\u003cbr\u003e\nStage 1: 20PP20J — 20 micron poly pleated. Catches coarse sediment, dirt, rust, and leaf matter. Clean every 3–6 months, replace every 12 months.\u003cbr\u003e\nStage 2: 1PS20J — 1 micron poly spun. Removes fine particles and physically blocks parasitic cysts. Replace every 6–12 months.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eMains water kit (KAS20JM) — for town supply\u003c\/strong\u003e\u003cbr\u003e\nStage 1: 5PS20J — 5 micron poly spun. Removes fine sediment from mains supply. Replace every 6–12 months.\u003cbr\u003e\nStage 2: ACB20J — 5 micron carbon block. Reduces chlorine taste and odour. Replace every 6–12 months, or earlier if taste returns.\u003c\/p\u003e\n\n\u003cp\u003eNot sure which kit 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\u003eAS20J\u003c\/th\u003e\n\u003cth\u003eKAS20J\u003c\/th\u003e\n\u003cth\u003eKAS20JM\u003c\/th\u003e\n\u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eConnections\u003c\/td\u003e\n\u003ctd colspan=\"3\"\u003e25mm (1\") female BSP\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMax flow\u003c\/td\u003e\n\u003ctd colspan=\"3\"\u003e155 lpm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMax pressure\u003c\/td\u003e\n\u003ctd colspan=\"3\"\u003e880 kPa (128 psi)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eWater temperature\u003c\/td\u003e\n\u003ctd colspan=\"3\"\u003e0–40°C\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMax ambient temperature\u003c\/td\u003e\n\u003ctd colspan=\"3\"\u003e50°C\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e1st stage cartridge\u003c\/td\u003e\n\u003ctd\u003eNone\u003c\/td\u003e\n\u003ctd\u003e20PP20J (20 micron)\u003c\/td\u003e\n\u003ctd\u003e5PS20J (5 micron)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e2nd stage cartridge\u003c\/td\u003e\n\u003ctd\u003eNone\u003c\/td\u003e\n\u003ctd\u003e1PS20J (1 micron)\u003c\/td\u003e\n\u003ctd\u003eACB20J (5 micron)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eHeight\u003c\/td\u003e\n\u003ctd colspan=\"3\"\u003e717mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eWidth\u003c\/td\u003e\n\u003ctd colspan=\"3\"\u003e410mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd colspan=\"3\"\u003eGlass reinforced polypropylene\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePressure relief valves\u003c\/td\u003e\n\u003ctd colspan=\"3\"\u003eYes — both bowls\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eInclusions\u003c\/td\u003e\n\u003ctd colspan=\"3\"\u003eHousing spanner, bracket fixings\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCertifications\u003c\/td\u003e\n\u003ctd colspan=\"3\"\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=\"3\"\u003eISO 9001, ISO 14001\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd colspan=\"3\"\u003e1 year (housing)\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\u003cp\u003e\u003cstrong\u003eAll configurations:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × Davey Microlene 20\" jumbo twin filter housing (AS20J)\u003c\/li\u003e\n  \u003cli\u003eHousing spanner\u003c\/li\u003e\n  \u003cli\u003eBracket fixings\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eRainwater and tank water kit (KAS20J) also includes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × 20PP20J — 20 micron poly pleated sediment filter\u003c\/li\u003e\n  \u003cli\u003e1 × 1PS20J — 1 micron poly spun sediment filter\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eMains water kit (KAS20JM) also includes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × 5PS20J — 5 micron poly spun sediment filter\u003c\/li\u003e\n  \u003cli\u003e1 × ACB20J — 5 micron carbon block filter\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 or 10\" cartridges will not fit.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's the advantage of 20\" jumbo cartridges over 10\" jumbo?\u003c\/h3\u003e\n\u003cp\u003eThe 20\" format holds roughly twice the media volume. That means higher dirt-holding capacity, less frequent replacements, and better flow rates on high-demand supplies. For large homes and lifestyle blocks, the 20\" is the right choice.\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.\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\u003eWhich kit should I choose — KAS20J or KAS20JM?\u003c\/h3\u003e\n\u003cp\u003eKAS20J is for tank, rainwater, and bore supplies where sediment and cyst removal are the priority. KAS20JM is for town (mains) supply where chlorine taste and odour are the concern. If you're unsure, get in touch and we'll help you choose.\u003c\/p\u003e\n\n\u003ch3\u003eCan I install two units in parallel for even higher flow?\u003c\/h3\u003e\n\u003cp\u003eYes. Davey recommends installing two kits in parallel when flow requirements exceed what a single unit can deliver.\u003c\/p\u003e\n\n\u003ch3\u003eCan I clean the Stage 1 cartridge in the rainwater kit?\u003c\/h3\u003e\n\u003cp\u003eYes. The 20 micron poly pleated cartridge is cleanable. Rinse under a tap every 3–6 months and replace annually, or earlier if it no longer recovers after cleaning.\u003c\/p\u003e\n\n\u003ch3\u003eWhy does it have pressure relief valves?\u003c\/h3\u003e\n\u003cp\u003eEach bowl has its own pressure relief valve. Press it before unscrewing the bowl to safely release water pressure — makes cartridge changes cleaner and easier.\u003c\/p\u003e\n\n\u003ch3\u003eDo I need a plumber to install it?\u003c\/h3\u003e\n\u003cp\u003eIt connects via standard 25mm (1\") BSP 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":"AS20J Only – Housing only","offer_id":44377490554924,"sku":"AS20J","price":785.0,"currency_code":"NZD","in_stock":true},{"title":"KAS20J – Rainwater Kit","offer_id":44377490587692,"sku":"KAS20J","price":935.0,"currency_code":"NZD","in_stock":true},{"title":"KAS20JM – Mains Water Kit","offer_id":44377490620460,"sku":"KAS20JM","price":1025.0,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0623\/5966\/6732\/files\/AS20J-dual-jumbo-filter-pack-1024x768_png.webp?v=1761097897","url":"https:\/\/www.filtrationstation.co.nz\/products\/microlene-20-inch-jumbo-twin-filter-kit-as20j","provider":"Filtration Station NZ","version":"1.0","type":"link"}