{"product_id":"pentair-dgd-series-dual-gradient-jumbo-filter-25-to-1-micron-10-or-20-nz","title":"Pentair DGD Series Dual Gradient Jumbo Filter - 25 to 1 Micron, 10\" or 20\" NZ","description":"\u003cp\u003e\u003cstrong\u003eA single cartridge that works as two — coarse outer layer catches heavy sediment, fine inner core catches the rest.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe Pentair DGD Series Dual Gradient filter is a depth-graded sediment cartridge made from 100% pure polypropylene. The outer layer filters at 25 micron, removing sand, silt, and visible particles. The inner core filters at 1 micron, capturing fine particles before water reaches downstream equipment. Because the outer layer protects the inner core from loading too quickly, the cartridge holds significantly more dirt than a standard single-density filter before restriction builds.\u003c\/p\u003e\n\n\u003cp\u003eAvailable in 10\" (DGD-2501) and 20\" (DGD-2501-20) for standard Jumbo (Big Blue) 4.5\" housings. Select your size using the dropdown above.\u003c\/p\u003e\n\n\u003ch2\u003eHow the dual gradient design works\u003c\/h2\u003e\n\u003cp\u003eA standard single-density cartridge filters at one micron rating throughout. As sediment accumulates, the whole cartridge loads evenly and restriction builds quickly.\u003c\/p\u003e\n\u003cp\u003eThe DGD Series uses a gradient density — the outer polypropylene is looser at 25 micron, capturing the bulk of the sediment load. The inner core is tighter at 1 micron, handling fine particles. The outer layer does the heavy lifting and slows down how quickly the inner core loads, which extends the overall service life of the cartridge.\u003c\/p\u003e\n\u003cp\u003eThis makes the DGD particularly well suited as a pre-filter before a UV system, where fine filtration is required but frequent cartridge changes are inconvenient.\u003c\/p\u003e\n\n\u003ch2\u003eKey specs at a glance\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eOuter layer: 25 micron | Inner core: 1 micron\u003c\/li\u003e\n  \u003cli\u003eMaterial: 100% pure polypropylene\u003c\/li\u003e\n  \u003cli\u003eDiameter: 4.5\" (Jumbo \/ Big Blue)\u003c\/li\u003e\n  \u003cli\u003eLengths: 10\" (DGD-2501) or 20\" (DGD-2501-20)\u003c\/li\u003e\n  \u003cli\u003eHigh dirt-holding capacity — dual gradient construction\u003c\/li\u003e\n  \u003cli\u003eFits standard Jumbo (Big Blue) 10\" and 20\" housings\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhich size do I need?\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e10\" (DGD-2501)\u003c\/strong\u003e — fits standard Jumbo (Big Blue) 10\" housings. Suited to most whole-house setups and UV pre-filtration.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e20\" (DGD-2501-20)\u003c\/strong\u003e — fits standard Jumbo (Big Blue) 20\" housings. Higher dirt capacity and longer service life. Suited to larger homes, farms, and high-demand installations.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eMatch the length to your existing housing. Both are 4.5\" diameter — standard Jumbo \/ Big Blue sizing.\u003c\/p\u003e\n\n\u003ch2\u003eFull specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eSpecification\u003c\/th\u003e\n      \u003cth\u003eDetail\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eFilter type\u003c\/td\u003e\n\u003ctd\u003eDual gradient depth sediment\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e100% pure polypropylene\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOuter layer\u003c\/td\u003e\n\u003ctd\u003e25 micron\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eInner core\u003c\/td\u003e\n\u003ctd\u003e1 micron\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDiameter\u003c\/td\u003e\n\u003ctd\u003e4.5\" (Jumbo \/ Big Blue)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eLength options\u003c\/td\u003e\n\u003ctd\u003e10\" \/ DGD-2501 | 20\" \/ DGD-2501-20\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003ePentair\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 x Pentair DGD Series dual gradient sediment filter (size as selected)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\n\u003ch3\u003eWhat does \"dual gradient\" mean?\u003c\/h3\u003e\n\u003cp\u003eIt means the cartridge has two filtration densities in one — a 25 micron outer layer and a 1 micron inner core. The outer layer captures coarse sediment first, which protects the inner core from loading too quickly. The result is a longer service life compared to a single-density 1 micron cartridge of the same size.\u003c\/p\u003e\n\n\u003ch3\u003eIs this a good pre-filter for a UV system?\u003c\/h3\u003e\n\u003cp\u003eYes. UV systems require fine filtration upstream — particles in the water reduce UV penetration and treatment effectiveness. The DGD's 1 micron inner core meets that requirement, while the 25 micron outer layer extends the time between cartridge changes by absorbing the bulk sediment load before it reaches the fine inner core.\u003c\/p\u003e\n\n\u003ch3\u003eWill it fit my Big Blue housing?\u003c\/h3\u003e\n\u003cp\u003eYes, if your housing is a standard Jumbo (Big Blue) 10\" or 20\" size. Both models are 4.5\" in diameter — the Jumbo \/ Big Blue standard. Check your housing length before ordering — the 10\" and 20\" models are not interchangeable.\u003c\/p\u003e\n\n\u003ch3\u003eHow often do I need to replace it?\u003c\/h3\u003e\n\u003cp\u003eReplacement interval depends on your water quality and sediment load. The dual gradient construction extends service life compared to a standard single-density 1 micron cartridge. Replace when flow drops noticeably or the cartridge is visibly saturated.\u003c\/p\u003e\n\n\u003ch3\u003eCan I use this on bore water?\u003c\/h3\u003e\n\u003cp\u003eYes. The 25 micron outer layer is well suited to the sediment loads typical of bore water. If your bore water is particularly high in sediment or has unusual chemistry, get in touch and we'll help you choose the right filtration setup.\u003c\/p\u003e\u003cdiv style=\"background:#fff3cd;border:1px solid #ffc107;border-radius:8px;padding:16px;margin:20px 0;\"\u003e\n\u003cp style=\"margin:0 0 8px;font-weight:700;color:#856404;\"\u003e⚠️ Disclaimer – Collective \/ Dropship Product\u003c\/p\u003e\n\u003cp style=\"margin:0;font-size:14px;color:#856404;\"\u003eThis product is supplied \u0026amp; shipped directly by the brand via Shopify Collective. Estimated delivery: 2–4 working days NZ-wide. Action Outdoors is not responsible for shipping delays from the supplier.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Filtration Station NZ","offers":[{"title":"10\"","offer_id":51983963848989,"sku":"10BDGD-PA","price":45.0,"currency_code":"NZD","in_stock":true},{"title":"20\"","offer_id":51983963881757,"sku":"20BDGD-PA","price":85.0,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0864\/1072\/3613\/files\/10BDGD-PAN-2000x2000.webp?v=1783221632","url":"https:\/\/actionoutdoors.kiwi\/zh\/products\/pentair-dgd-series-dual-gradient-jumbo-filter-25-to-1-micron-10-or-20-nz","provider":"Action Outdoors Limited","version":"1.0","type":"link"}