{"product_id":"unicel-6ch-940am-45-sq-ft-antimicrobial-spa-filter","title":"Unicel 6CH-940AM | 45 sq ft Antimicrobial Spa Filter","description":"\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eUnicel 6CH-940AM\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis a 45 square foot\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003etop-load\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ereplacement cartridge for\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eWaterway front access skimmers\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eand the many spas built around them, replacing OEM part number\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e817-0050\u003c\/strong\u003e. It is a short, wide cartridge — 6\" across and only 8-1\/4\" tall — and it fits\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e225 pleats\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003einto that compact body, the densest fold count relative to length of any cartridge in the Unicel range.\u003c\/p\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAM\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ein the part number stands for\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eantimicrobial\u003c\/strong\u003e. The media is treated to inhibit the growth of odor-causing and stain-causing bacteria on the filter itself, which is what keeps a cartridge from developing that musty smell it can get even when it looks clean. It does not sanitize your water — your chlorine, bromine, or salt system still does that, and this cartridge changes nothing about your chemistry routine. It simply keeps the filter from working against your sanitizer between cleanings.\u003c\/p\u003e\n\u003cp\u003eThe connection is where this cartridge demands real attention. The bottom carries an\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003einjection molded 1-1\/2\" SAE thread\u003c\/strong\u003e, and that is\u003cspan\u003e \u003c\/span\u003e\u003cem\u003enot\u003c\/em\u003e\u003cspan\u003e \u003c\/span\u003ethe same as a 1-1\/2\" MPT pipe thread even though the numbers read identically. SAE and MPT are separate thread standards with different forms and pitches. A 1-1\/2\" SAE cartridge will not thread into an MPT fitting, and forcing one into the other damages both. This is far and away the most common ordering mistake on this cartridge, and it is worth thirty seconds of checking before you buy.\u003c\/p\u003e\n\u003cp\u003eAbove the thread, a\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003esemi-circular handle\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003espans the closed top, giving a firm grip for threading the cartridge on and lifting it out without touching the pleats. Media is Unicel's\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e3 oz\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003epolyester with antimicrobial treatment, over a solid injection-molded core with chemical-resistant end caps. Made in the USA by Meissner Manufacturing, with more than 45 years behind the Unicel name.\u003c\/p\u003e\n\u003cdiv class=\"lti-pro-tip\"\u003e\n\u003cp\u003e\u003cstrong\u003ePro Tip — check your thread type, not just the size.\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThis cartridge uses a\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1-1\/2\" SAE\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ethread. Other spa cartridges use a\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1-1\/2\" MPT\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003epipe thread. The nominal size is identical and the two are not interchangeable. Here is how to tell them apart by eye:\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eSAE threads are coarse\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e— noticeably chunkier, with fewer, deeper turns, running straight down a cylinder of constant diameter.\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eMPT pipe threads are finer\u003c\/strong\u003e, packed more closely together, and taper slightly so the fitting is a touch narrower at the tip than at the base. Hold your old cartridge up and look at the thread profile. If it is coarse and straight-sided, this is your filter.\u003c\/p\u003e\n\u003cdiv class=\"lti-pro-tip\"\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"lti-pro-tip\"\u003e\n\u003cp\u003e\u003cspan role=\"img\" aria-label=\"®\"\u003eUNICEL®\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Unicel","offers":[{"title":"Default Title","offer_id":48990328422518,"sku":"tpk1791796876586","price":30.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0630\/7076\/5174\/files\/unicel-6ch-940am-45-sq-ft-antimicrobial-spa-filter_1.jpg?v=1791796883","url":"https:\/\/nexovella.com\/products\/unicel-6ch-940am-45-sq-ft-antimicrobial-spa-filter","provider":"Nexovella","version":"1.0","type":"link"}