{"product_id":"10-big-blue-whole-house-tannin-reduction-system","title":"10\" Big Blue Whole House Water Filter System – Tannin Reduction Cartridge","description":"\u003cp\u003eA single-stage Big Blue whole house filtration system housing a tannin-selective reduction cartridge. Designed for properties on private water\n supplies – boreholes, springs and wells – where naturally occurring tannins from peat, decaying vegetation and leaf litter give water a yellow or \n tea-coloured tint and an earthy taste.\u003c\/p\u003e\n \n \u003cp\u003eThe cartridge is supplied with the system and uses the universal 10\" x 4.5\" (\"Big Blue\") format, so future replacements stay simple.\u003c\/p\u003e \n \n \u003ch3\u003eWhat tannins are – and why a standard filter won't shift them\u003c\/h3\u003e \n \u003cp\u003eTannins are large organic molecules that leach into water from peat, leaves and decaying roots. They're not harmful to drink, but they leave\n their mark in three ways:\u003c\/p\u003e \n \u003cul\u003e \n \u003cli\u003e\n\u003cstrong\u003eDiscolouration\u003c\/strong\u003e – water comes out the tap with a yellow, amber or \"weak tea\" tint.\u003c\/li\u003e \n \u003cli\u003e\n\u003cstrong\u003eStaining\u003c\/strong\u003e – fixtures, sinks, laundry and toilet bowls pick up brown marks over time.\u003c\/li\u003e \n \u003cli\u003e\n\u003cstrong\u003eTaste and odour\u003c\/strong\u003e – an earthy, musty or astringent character that sediment and carbon cartridges don't fully remove.\u003c\/li\u003e \n \u003c\/ul\u003e \n \u003cp\u003eStandard sediment and carbon filters can't capture tannins because the molecules are too small for mechanical filtration and bind too loosely \n to activated carbon. They need a dedicated anion-exchange media designed specifically for this job – which is exactly what this cartridge \n contains.\u003c\/p\u003e \n \n \u003ch3\u003eHow it works\u003c\/h3\u003e\n \u003cp\u003eThe tannin cartridge is packed with a tannin-selective anion-exchange resin. As water flows through the cartridge, the resin attracts the\n negatively charged tannin molecules and exchanges them for chloride ions, leaving water visibly clearer and free of the earthy taste tannins \n cause.\u003c\/p\u003e\n \n \u003ch3\u003eSingle-stage vs two-stage – which do you need?\u003c\/h3\u003e \n \u003cp\u003eThis single housing is the simpler, more economical setup of the two whole-house tannin systems we offer. It's ideal in two situations:\u003c\/p\u003e\n \u003cul\u003e \n \u003cli\u003e\n\u003cstrong\u003eClean supplies with a tannin issue:\u003c\/strong\u003e if your borehole or spring water is otherwise low in sediment and iron, the tannin\n cartridge can do its job without a pre-filter ahead of it.\u003c\/li\u003e \n \u003cli\u003e\n\u003cstrong\u003eAdding to an existing setup:\u003c\/strong\u003e if you already have sediment or iron filtration in place, this single housing is a clean way\n to bolt a tannin stage onto your existing system.\u003c\/li\u003e \n \u003c\/ul\u003e \n \u003cp\u003eIf your supply has visible sediment or sand alongside the tannin discolouration, the two-stage version with a 5-micron sediment pre-filter is a\n better choice – it'll significantly extend the life of the tannin cartridge.\u003c\/p\u003e \n \n \u003ch3\u003eImportant – will this work on your supply?\u003c\/h3\u003e \n \u003cp\u003eTannin cartridges work brilliantly when matched to the right water, but they're more sensitive to feed water conditions than sediment or carbon\n filters. Before ordering, please consider:\u003c\/p\u003e \n \u003cul\u003e\n \u003cli\u003e\n\u003cstrong\u003eHard water:\u003c\/strong\u003e calcium and magnesium foul tannin resin and shorten its working life dramatically. If your supply is hard, we'd\n recommend installing a water softener upstream of this system.\u003c\/li\u003e \n \u003cli\u003e\n\u003cstrong\u003eIron and manganese:\u003c\/strong\u003e high levels of either will also coat and disable the resin. These are best dealt with by a dedicated\n iron filter ahead of the tannin stage.\u003c\/li\u003e \n \u003cli\u003e\n\u003cstrong\u003eChlorine:\u003c\/strong\u003e tannin resins handle low to moderate chlorine, but heavily chlorinated supplies should be carbon-filtered\n first.\u003c\/li\u003e \n \u003cli\u003e\n\u003cstrong\u003eTannin level:\u003c\/strong\u003e cartridge life depends entirely on how much tannin is in your water. Lightly tea-tinged water will give you\n many months between changes; heavily stained water may need replacement every few weeks.\u003c\/li\u003e \n \u003c\/ul\u003e \n \u003cp\u003eIf you're not sure whether tannin is the right answer for your discolouration, we're always happy to talk it through – contact us with a sample\n or a description of what you're seeing and we'll point you in the right direction.\u003c\/p\u003e \n \n \u003ch3\u003eCompatibility\u003c\/h3\u003e \n \u003cul\u003e \n \u003cli\u003eStandard 1\" female BSP inlet and outlet ports – a straight fit on UK whole-house plumbing.\u003c\/li\u003e\n \u003cli\u003eAccepts any standard 10\" x 4.5\" (\"Big Blue\") cartridge, so the housing can be repurposed for sediment, carbon or specialist filtration if \n your needs change.\u003c\/li\u003e \n \u003cli\u003eSuitable for cold mains feeds in domestic and light commercial settings.\u003c\/li\u003e \n \u003c\/ul\u003e \n \n \u003ch3\u003eTechnical specifications\u003c\/h3\u003e \n \u003ctable\u003e\n \u003ctbody\u003e \n \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSystem type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSingle-stage 10\" Big Blue whole house filter\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCartridge size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10\" x 4.5\" (universal Big Blue format)\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCartridge supplied\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTannin-selective anion-exchange cartridge\u003c\/td\u003e\n\u003c\/tr\u003e \n \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInlet \/ outlet\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1\" female BSP thread\u003c\/td\u003e\n\u003c\/tr\u003e \n \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating pressure\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1.4–6 bar (≈20–88 psi)\u003c\/td\u003e\n\u003c\/tr\u003e \n \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWater temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4–38°C (cold mains feeds only – tannin resin should not be used on hot supplies)\u003c\/td\u003e\n\u003c\/tr\u003e \n \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCartridge life\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHighly variable – dependent on tannin concentration in feed water\u003c\/td\u003e\n\u003c\/tr\u003e \n \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHousing material\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFood-grade polypropylene\u003c\/td\u003e\n\u003c\/tr\u003e \n \u003c\/tbody\u003e \n \u003c\/table\u003e \n \n \u003cp\u003eIf your incoming mains pressure exceeds 6 bar (≈88 psi), fit a pressure regulator upstream. UK mains pressure is typically well within range, \n but it's worth checking before installation.\u003c\/p\u003e\n \n \u003ch3\u003eInstallation notes\u003c\/h3\u003e \n \u003cp\u003eThe system is designed for wall mounting at the point of entry, downstream of your stopcock. We'd recommend installing isolation valves on the\n inlet and outlet so cartridge changes are quick and tidy.\u003c\/p\u003e \n \n \u003cp\u003eReplacement intervals depend entirely on local water quality. As a guide, the tannin cartridge will last anywhere from 1 to 12 months based on \n the tannin load in your supply. Many customers find it useful to keep a spare cartridge on hand once they've established a baseline.\u003c\/p\u003e\n \n \u003ch3\u003eWhat's included\u003c\/h3\u003e \n \u003cul\u003e\n \u003cli\u003e10\" Big Blue single filter housing with mounting bracket\u003c\/li\u003e \n \u003cli\u003eTannin reduction cartridge (10\" x 4.5\")\u003c\/li\u003e\n \u003cli\u003eFilter bowl wrench\u003c\/li\u003e \n \u003cli\u003eWall mounting screws\u003c\/li\u003e\n \u003cli\u003eSpare housing O-ring\u003c\/li\u003e \n \u003cli\u003ePTFE (Teflon) tape\u003c\/li\u003e \n \u003cli\u003eInstruction guidance\u003c\/li\u003e\n \u003c\/ul\u003e ","brand":"Filter Flair","offers":[{"title":"Default Title","offer_id":57767351943542,"sku":"FF-BB10-TAN","price":131.99,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0359\/1356\/4293\/files\/10-big-blue-whole-house-water-filter-system-tannin-reduction-cartridge-ff-bb10-tan-8396015.png?v=1777401553","url":"https:\/\/filterflair.co.uk\/products\/10-big-blue-whole-house-tannin-reduction-system","provider":"Filter Flair","version":"1.0","type":"link"}