{"product_id":"crystal-quest-lead-under-sink-filtration-system","title":"Crystal Quest Lead Under Sink Filtration System","description":"\u003ch2\u003eCrystal Quest Lead Under Sink Water Filtration System – Drinking Water Filter\u003c\/h2\u003e\n\u003cp\u003eThe Crystal Quest Lead Under Sink Water Filter System is a point-of-use drinking water filter designed to install beneath a sink and connect to the included faucet and installation hardware. It is available in single, double, and triple configurations, with the installation valve selected based on the home’s under-sink plumbing. The system uses a 1\/2-micron lead and cyst removal carbon block filter, with SMART and carbon block filtration stages included depending on the selected configuration. The lead cartridge has a listed 6,000-gallon capacity, depending on detected lead level and influent parts-per-billion concentration. With a 1\/4\" connection size, this under-sink lead water filter is intended for point-of-use drinking water applications in homes, apartments, offices, and similar settings where lead reduction is a treatment goal.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eUnder-Sink Lead Reduction for Drinking Water\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThis Crystal Quest system installs beneath the sink to keep the filter housing off the countertop. It is designed for point-of-use drinking water applications where water testing or local plumbing conditions indicate lead as a treatment concern and the included faucet setup is preferred.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003e1\/2-Micron Lead and Cyst Cartridge\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe lead removal cartridge uses a 1\/2-micron carbon block filter designed to reduce lead and cysts. Its listed capacity is 6,000 gallons, with actual cartridge life depending on detected lead level, influent concentration, water conditions, and use.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eSingle, Double, or Triple Configurations\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe lead removal cartridge is the core filtration stage. The single configuration includes the lead cartridge, the double configuration adds the SMART cartridge, and the triple configuration adds both SMART and carbon block filtration.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eConnection Type and Installation Planning\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eSelect the installation valve based on the home’s under-sink plumbing and the installation manual. Crystal Quest states that a saddle valve is used for hard copper tubing, while a T-valve is required for flex tubing. A leak detector or flood-prevention valve may be considered as a recommended add-on for added installation protection where appropriate.\u003c\/p\u003e\n\u003c!-- Responsive Image\/Text Blocks --\u003e\n\u003cdiv style=\"display: flex; flex-wrap: wrap; align-items: center; justify-content: center; padding: 0;\"\u003e\n\u003cdiv style=\"flex: 1 1 300px; max-width: 50%; padding: 0 4px;\" class=\"responsive-half\"\u003e\u003cimg decoding=\"async\" loading=\"lazy\" style=\"width: 100%; height: auto;\" class=\"responsive-image\" alt=\"Crystal Quest lead under sink water filter system for drinking water filtration\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0761\/5781\/2888\/files\/triple-lead-under-sink-water-filter-system-crystal-quest-under-sink-water-filters-33135901900893.webp?v=1777592703\" width=\"1000\" height=\"1000\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"flex: 1 1 300px; max-width: 50%; padding: 1rem; text-align: center;\" class=\"responsive-half\"\u003e\n\u003cp\u003eThis under-sink lead water filter is designed for kitchens and point-of-use drinking water setups where under-sink placement is preferred. It connects below the sink and supplies filtered water through the included faucet setup.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Image Block 2 --\u003e\n\u003cdiv class=\"image-block-2\" style=\"display: flex; flex-wrap: wrap; align-items: center; justify-content: center; padding: 0;\"\u003e\n\u003cdiv style=\"flex: 1 1 300px; max-width: 50%; padding: 1rem; text-align: center;\" class=\"responsive-half\"\u003e\n\u003cp\u003eChoose the configuration and valve option that match your available installation space, plumbing, and water concerns. Single, double, and triple layouts support different cartridge combinations, while saddle-valve and T-valve selections support different under-sink plumbing setups.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1 1 300px; max-width: 50%; padding: 0 4px;\" class=\"responsive-half\"\u003e\u003cimg decoding=\"async\" loading=\"lazy\" style=\"width: 100%; height: auto;\" class=\"responsive-image\" alt=\"Crystal Quest lead under sink water filter single configuration\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0761\/5781\/2888\/files\/single-lead-under-sink-water-filter-system-crystal-quest-under-sink-water-filters-33135901868125.webp?v=1777592703\" width=\"1000\" height=\"1000\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Mobile Stack Fix --\u003e\n\u003cstyle\u003e\n@media(max-width:768px) {\n  .responsive-half { max-width: 100% !important; flex: 1 1 100% !important; }\n  .responsive-image { width: 100% !important; height: auto !important; }\n  .image-block-2 { flex-direction: column-reverse !important; }\n}\n\u003c\/style\u003e\n\u003ch3\u003eCrystal Quest Lead Under Sink Water Filtration System Features \u0026amp; Benefits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLead-focused cartridge:\u003c\/strong\u003e Uses a 1\/2-micron lead and cyst removal carbon block filter for point-of-use drinking water filtration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eListed lead cartridge capacity:\u003c\/strong\u003e Lead cartridge capacity is listed at 6,000 gallons, depending on detected lead level and influent ppb.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnder-sink installation:\u003c\/strong\u003e Installs beneath the sink to keep the filtration system out of countertop space.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded faucet hardware:\u003c\/strong\u003e Comes with faucet hardware and installation components for filtered water access; installation valve selection depends on under-sink plumbing type.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSingle, double, or triple options:\u003c\/strong\u003e Choose the cartridge layout that fits available installation space and filtration needs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstallation valve guidance:\u003c\/strong\u003e Crystal Quest states that a saddle valve is used for hard copper tubing, while a T-valve is required for flex tubing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLeak detector option:\u003c\/strong\u003e A flood-prevention valve may be considered for added installation protection where appropriate.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv style=\"background: #EFE9DC; color: #1f1f1f; border: 1px solid #D6D0C4; border-radius: 8px; padding: 1.5rem; text-align: center; margin: 2rem 0;\"\u003e\n\u003cp\u003e\u003cstrong\u003eNeed help choosing the right lead under-sink filter?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eTrueStead Supply can help you compare configuration size, connection type, and installation requirements.\u003c\/p\u003e\n\u003cp\u003e✓ 1\/2-micron lead and cyst cartridge\u003cbr\u003e✓ Single, double, and triple configurations\u003cbr\u003e✓ T-valve and saddle-valve connection choices\u003c\/p\u003e\n\u003ca href=\"https:\/\/www.truesteadsupply.com\/pages\/contact-us\" style=\"display: inline-block; padding: 0.75rem 1.5rem; background-color: #2f4f2f; color: #ffffff; text-decoration: none; font-weight: bold; border-radius: 6px;\"\u003eContact Us for a Quote\u003c\/a\u003e\n\u003c\/div\u003e\n\u003ch3\u003eCrystal Quest Lead Under Sink Water Filtration System Specifications\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin-bottom: 2rem; border: 1px solid #D6D0C4;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #D6D0C4; padding: 0.75rem; font-weight: bold;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #D6D0C4; padding: 0.75rem;\"\u003eCrystal Quest\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #D6D0C4; padding: 0.75rem; font-weight: bold;\"\u003eProduct Type\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #D6D0C4; padding: 0.75rem;\"\u003eLead under sink water filtration system\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #D6D0C4; padding: 0.75rem; font-weight: bold;\"\u003eInstallation Type\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #D6D0C4; padding: 0.75rem;\"\u003eUnder sink, included faucet setup\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #D6D0C4; padding: 0.75rem; font-weight: bold;\"\u003eConfiguration Options\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #D6D0C4; padding: 0.75rem;\"\u003eSingle, double, or triple\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #D6D0C4; padding: 0.75rem; font-weight: bold;\"\u003eCartridge Mapping\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #D6D0C4; padding: 0.75rem;\"\u003eSingle: lead cartridge; Double: lead + SMART; Triple: lead + SMART + carbon block\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #D6D0C4; padding: 0.75rem; font-weight: bold;\"\u003eInstallation Valve Guidance\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #D6D0C4; padding: 0.75rem;\"\u003eSaddle valve for hard copper tubing; T-valve for flex tubing, per Crystal Quest guidance\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #D6D0C4; padding: 0.75rem; font-weight: bold;\"\u003eConnection Size\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #D6D0C4; padding: 0.75rem;\"\u003e1\/4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #D6D0C4; padding: 0.75rem; font-weight: bold;\"\u003ePrimary Cartridge Type\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #D6D0C4; padding: 0.75rem;\"\u003e1\/2-micron lead and cyst removal carbon block filter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #D6D0C4; padding: 0.75rem; font-weight: bold;\"\u003eLead Cartridge Capacity\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #D6D0C4; padding: 0.75rem;\"\u003e6,000 gallons; depends on detected lead level and influent ppb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #D6D0C4; padding: 0.75rem; font-weight: bold;\"\u003eWater Testing Note\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #D6D0C4; padding: 0.75rem;\"\u003eLead cartridge performance and service life depend on detected lead level, influent concentration, water conditions, and usage; water testing is recommended before sizing or replacement planning.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #D6D0C4; padding: 0.75rem; font-weight: bold;\"\u003eAdditional Cartridge Stages\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #D6D0C4; padding: 0.75rem;\"\u003eDouble configurations add SMART filtration; triple configurations add SMART and carbon block filtration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #D6D0C4; padding: 0.75rem; font-weight: bold;\"\u003eOperating Pressure\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #D6D0C4; padding: 0.75rem;\"\u003e20-60 psi\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #D6D0C4; padding: 0.75rem; font-weight: bold;\"\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #D6D0C4; padding: 0.75rem;\"\u003e40°F-90°F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #D6D0C4; padding: 0.75rem; font-weight: bold;\"\u003eSingle Dimensions\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #D6D0C4; padding: 0.75rem;\"\u003e5\" L × 14\" H × 5\" W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #D6D0C4; padding: 0.75rem; font-weight: bold;\"\u003eDouble Dimensions\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #D6D0C4; padding: 0.75rem;\"\u003e10\" L × 14\" H × 5\" W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #D6D0C4; padding: 0.75rem; font-weight: bold;\"\u003eTriple Dimensions\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #D6D0C4; padding: 0.75rem;\"\u003e15\" L × 14\" H × 5\" W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #D6D0C4; padding: 0.75rem; font-weight: bold;\"\u003eRecommended Add-On\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #D6D0C4; padding: 0.75rem;\"\u003eLeak detector \/ flood-prevention valve may be considered where appropriate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #D6D0C4; padding: 0.75rem; font-weight: bold;\"\u003eInstallation Note\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #D6D0C4; padding: 0.75rem;\"\u003eFollow the installation manual for faucet, valve, connection, and pressure-related setup requirements\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch4\u003eCrystal Quest Lead Under Sink Water Filtration System Info\u003c\/h4\u003e\n\u003cp\u003e\u003ca rel=\"noopener\" title=\"UndersinkWaterFilterManual.pdf\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0761\/5781\/2888\/files\/Undersink-SingleDoubleTripleManual23.pdf?v=1777514362\" target=\"_blank\"\u003eUndersink Manual\u003c\/a\u003e\u003c\/p\u003e","brand":"Crystal Quest","offers":[{"title":"Single \/ T-Valve","offer_id":48949526036632,"sku":"CQE-US-00335-T","price":182.9,"currency_code":"USD","in_stock":true},{"title":"Single \/ Saddle Valve","offer_id":48949526069400,"sku":"CQE-US-00335-S","price":182.9,"currency_code":"USD","in_stock":true},{"title":"Single \/ Both","offer_id":48949526102168,"sku":"CQE-US-00335-B","price":191.85,"currency_code":"USD","in_stock":true},{"title":"Double \/ T-Valve","offer_id":48949526134936,"sku":"CQE-US-00336-T","price":224.35,"currency_code":"USD","in_stock":true},{"title":"Double \/ Saddle Valve","offer_id":48949526167704,"sku":"CQE-US-00336-S","price":224.35,"currency_code":"USD","in_stock":true},{"title":"Double \/ Both","offer_id":48949526200472,"sku":"CQE-US-00336-B","price":233.3,"currency_code":"USD","in_stock":true},{"title":"Triple \/ T-Valve","offer_id":48949526233240,"sku":"CQE-US-00337-T","price":256.8,"currency_code":"USD","in_stock":true},{"title":"Triple \/ Saddle Valve","offer_id":48949526266008,"sku":"CQE-US-00337-S","price":256.8,"currency_code":"USD","in_stock":true},{"title":"Triple \/ Both","offer_id":48949526298776,"sku":"CQE-US-00337-B","price":265.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0761\/5781\/2888\/files\/double-lead-under-sink-water-filter-system-crystal-quest-under-sink-water-filters-33135901933661.webp?v=1777592703","url":"https:\/\/www.truesteadsupply.com\/products\/crystal-quest-lead-under-sink-filtration-system","provider":"TrueStead Supply","version":"1.0","type":"link"}