This configuration introduces a significant upgrade: the 4-inch top opening<\/b>. Moving from the standard 2.5\u2033 to a 4\u2033 opening<\/b> on this 120L Pentair Structural vessel<\/b> allows for much easier media loading and internal maintenance, making it a favorite for professional installers.<\/p>\n
Here is the rewritten website content for the Pentair 1665 (120L)<\/b> with the high-flow 4″ Non-Backwash Control Head<\/b>.<\/p>\n
\nPentair Structural 1665 (120L) | 4-Inch Top Opening<\/h2>\n
Professional-Grade Non-Backwash Filtration System<\/h3>\n
Upgrade your water treatment setup with the <\/span>Pentair 1665<\/span><\/b>, featuring an oversized <\/span>4-inch top opening<\/span><\/b> for easier access and media handling.<\/span> Paired with our specialized High-Flow Non-Backwash Control Head<\/b>, this 120-liter system is the premier choice for high-demand residential and commercial filtration where performance and ease of service are paramount.<\/p>\n <\/p>\n Designed for “In-Out” flow media\u2014such as Carbon, Calcite, or Mineral beds\u2014this system maximizes contact time without the need for a drain line or power source.<\/p>\n Engineered for the 4-inch threaded interface.<\/i><\/p>\n Effortless Monitoring:<\/b> Features two \u00bc\u2033 pre-tapped ports<\/b> for inlet\/outlet pressure gauges, allowing you to monitor pressure drop and media saturation instantly.<\/p>\n<\/li>\n High-Volume Flow:<\/b> Designed to handle higher flow rates with minimal restriction, supporting plumbing connections from \u00be\u2033 to 1\u00bd\u2033<\/b>.<\/p>\n<\/li>\n Zero-Waste Design:<\/b> Eliminates the backwash cycle entirely, saving thousands of liters of water and simplifying your plumbing installation.<\/p>\n<\/li>\n Maintenance-Free:<\/b> No internal motors, gears, or seals to wear out, ensuring decades of reliable service.<\/p>\n<\/li>\n<\/ul>\n The industry standard for durability and ease of service.<\/i><\/p>\n 4-Inch Top Opening:<\/b> The wide-mouth design makes pouring media like heavy carbon or minerals significantly faster and reduces the risk of spills during installation.<\/p>\n<\/li>\n 120-Liter Capacity:<\/b> Provides the perfect volume for whole-house dechlorination or light commercial pH balancing.<\/p>\n<\/li>\n Seamless HDPE Liner:<\/b> A high-density polyethylene inner shell reinforced with high-strength fiberglass filament for ultimate pressure resistance.<\/p>\n<\/li>\n Corrosion-Proof Construction:<\/span><\/b> 100% resistant to rust and degradation, making it ideal for high-humidity or coastal installations.<\/span><\/p>\n <\/li>\n<\/ul>\n While standard 2.5″ openings are common, the 4″ threaded opening<\/b> on this 1665 vessel is a professional-tier feature. It allows for:<\/p>\n Faster Media Loading:<\/b> No need for small funnels; pour media directly into the tank.<\/p>\n<\/li>\n Easier Inspection:<\/b> Better visibility into the tank during maintenance or media replacement.<\/p>\n<\/li>\n Robust Connection:<\/b> A larger surface area for the control head seal, ensuring long-term leak prevention.<\/p>\n<\/li>\n<\/ol>\n This configuration introduces a significant upgrade: the 4-inch top opening. Moving from the standard 2.5\u2033 to a 4\u2033 opening on this 120L Pentair Structural vessel allows for much easier media loading and internal maintenance, making it a favorite for professional installers. Here is the rewritten website content for the Pentair 1665 (120L) with the high-flow […]<\/p>\n","protected":false},"featured_media":2442,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[],"product_cat":[250,251],"product_tag":[276,275,273,274,256,271],"class_list":["post-1317","product","type-product","status-publish","has-post-thumbnail","product_cat-frp-fiberglass-pressure-vessels","product_cat-industrial-frp-vessels","product_tag-16x65inch","product_tag-480x1680-mm","product_tag-4tankmouth","product_tag-50x50cmbase-size","product_tag-frp-vessels","product_tag-industrial-frp-vessels","first","instock","shipping-taxable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/tqwater.co.za\/index.php?rest_route=\/wp\/v2\/product\/1317","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/tqwater.co.za\/index.php?rest_route=\/wp\/v2\/product"}],"about":[{"href":"https:\/\/tqwater.co.za\/index.php?rest_route=\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/tqwater.co.za\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1317"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/tqwater.co.za\/index.php?rest_route=\/wp\/v2\/media\/2442"}],"wp:attachment":[{"href":"https:\/\/tqwater.co.za\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1317"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/tqwater.co.za\/index.php?rest_route=%2Fwp%2Fv2%2Fproduct_brand&post=1317"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/tqwater.co.za\/index.php?rest_route=%2Fwp%2Fv2%2Fproduct_cat&post=1317"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/tqwater.co.za\/index.php?rest_route=%2Fwp%2Fv2%2Fproduct_tag&post=1317"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\n[The Control] High-Flow 4″ Non-Backwash Head<\/h3>\n
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\n[The Vessel] Pentair Structural 1665 (120L)<\/h3>\n
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\nWhy the 4-Inch Opening Matters<\/h3>\n
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\nTechnical Specifications<\/h3>\n
\n\n
\n Feature<\/strong><\/td>\n Specification<\/strong><\/td>\n<\/tr>\n<\/thead>\n\n \n Vessel Brand<\/b><\/span><\/td>\n Pentair Structural<\/span><\/td>\n<\/tr>\n \n Model<\/b><\/span><\/td>\n 1665<\/span><\/td>\n<\/tr>\n \n Opening Size<\/b><\/span><\/td>\n 4″ Threaded Top<\/b><\/span><\/td>\n<\/tr>\n \n Nominal Volume<\/b><\/span><\/td>\n 120 Liters<\/span><\/td>\n<\/tr>\n \n Max Working Pressure<\/b><\/span><\/td>\n 150 PSI (10.3 bar)<\/span><\/td>\n<\/tr>\n \n Plumbing Connections<\/b><\/span><\/td>\n \u00be\u2033 \u2013 1\u00bd\u2033<\/span><\/td>\n<\/tr>\n \n System Type<\/b><\/span><\/td>\n Non-Backwash (In-Out)<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"excerpt":{"rendered":"