{"id":920979,"date":"2026-09-29T14:00:00","date_gmt":"2026-09-29T12:00:00","guid":{"rendered":"https:\/\/djya2ldob4.wpdns.site\/?page_id=920979"},"modified":"2026-10-30T10:12:36","modified_gmt":"2026-10-30T09:12:36","slug":"os3","status":"publish","type":"page","link":"https:\/\/www.cqop.com\/en\/list-of-soa-categories\/specialised-works\/os3\/","title":{"rendered":"SOA category OS3"},"content":{"rendered":"\n\n<div class=\"cqop-v6 cqop-v6-soa-categoria-os3\" data-v6-page=\"Categoria-OS3\">\n\n<div class=\"cqop-v6-pannello-829311a\" id=\"contenuto\">\n\n<div class=\"gb-text cqop-v6-pannello-fd08351\" aria-hidden=\"true\"><\/div>\n\n\n\n\n\n<div class=\"gb-text cqop-v6-pannello-d3705ba\" aria-hidden=\"true\"><\/div>\n\n\n\n\n\n<div class=\"cqop-v6-contenuto-06a0e85\"><nav style=\"--separator: &quot;\/&quot;\" class=\"cqop-breadcrumbs wp-block-breadcrumbs\" aria-label=\"Breadcrumbs\"><ol><li><a href=\"https:\/\/www.cqop.com\/en\/\">Home<\/a><\/li><li><a href=\"https:\/\/www.cqop.com\/en\/list-of-soa-categories\/\">List of SOA categories<\/a><\/li><li><a href=\"https:\/\/www.cqop.com\/en\/list-of-soa-categories\/specialised-works\/\">SOA specialised works categories<\/a><\/li><li><span aria-current=\"page\">SOA category OS3<\/span><\/li><\/ol><\/nav>\n\n\n\n<div class=\"cqop-v6-pannello-f3875ab\">\n\n<span class=\"gb-text cqop-v6-pannello-4855609\">OS3<\/span>\n\n\n\n\n\n<span class=\"gb-text cqop-v6-pannello-ea96d22\">Specialised works categories<\/span>\n\n<\/div>\n\n\n\n\n\n<h1 class=\"gb-text cqop-v6-titolo-b35a3b5\">SOA category <span class=\"cqop-v6-pannello-8a3115e\">OS3<span aria-hidden=\"true\" class=\"cqop-v6-pannello-f4fc0bb\"><\/span><\/span><\/h1>\n\n\n\n\n\n<p class=\"gb-text cqop-v6-testo-7496375\">Water and sanitary systems, kitchens, laundries<\/p>\n\n<\/div>\n\n<\/div>\n\n\n\n\n\n<div class=\"cqop-v6-pannello-13e79de\">\n\n<div class=\"cqop-v6-griglia-642d0e4\">\n\n<div>\n<p class=\"gb-text cqop-v6-testo-43af25e\"><strong class=\"cqop-v6-pannello-7f02261\">OS3<\/strong> covers <strong class=\"cqop-v6-pannello-7f02261\">water, sanitary, gas and fire-fighting systems<\/strong>, <strong class=\"cqop-v6-pannello-7f02261\">industrial kitchens<\/strong> and <strong class=\"cqop-v6-pannello-7f02261\">professional laundries<\/strong>: supply, installation, <strong class=\"cqop-v6-pannello-7f02261\">maintenance<\/strong> and renovation.<\/p>\n<\/div>\n\n\n\n\n\n<div class=\"cqop-v6-pannello-136555f\">\n\n<div class=\"cqop-v6-pannello-be753d0\">\n\n<svg focusable=\"false\" role=\"presentation\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 201 201\" width=\"201\" height=\"201\" aria-hidden=\"true\" class=\"cqop-os-original-icon\" style=\"display:block;width:120px;height:120px;max-width:none;margin:0 0 28px;\"><path fill=\"#fff\" d=\"M22.9 168.9h2.2v2.2h-2.2zM22.9 164.26h2.2v2.2h-2.2zM22.9 159.61h2.2v2.2h-2.2zM22.9 154.97h2.2v2.2h-2.2zM22.9 150.33h2.2v2.2h-2.2zM22.9 145.69h2.2v2.2h-2.2zM22.9 141.04h2.2v2.2h-2.2zM22.9 136.4h2.2v2.2h-2.2zM22.9 131.76h2.2v2.2h-2.2zM22.9 127.11h2.2v2.2h-2.2zM22.9 122.47h2.2v2.2h-2.2zM22.9 117.83h2.2v2.2h-2.2zM22.9 113.19h2.2v2.2h-2.2zM22.9 108.54h2.2v2.2h-2.2zM22.9 103.9h2.2v2.2h-2.2zM27.61 103.9h2.2v2.2h-2.2zM32.33 103.9h2.2v2.2h-2.2zM37.04 103.9h2.2v2.2h-2.2zM41.76 103.9h2.2v2.2h-2.2zM46.47 103.9h2.2v2.2h-2.2zM51.19 103.9h2.2v2.2h-2.2zM55.9 103.9h2.2v2.2h-2.2zM55.9 99.07h2.2v2.2h-2.2zM55.9 94.23h2.2v2.2h-2.2zM55.9 89.4h2.2v2.2h-2.2zM55.9 84.57h2.2v2.2h-2.2zM55.9 79.73h2.2v2.2h-2.2zM55.9 74.9h2.2v2.2h-2.2zM60.5 74.9h2.2v2.2h-2.2zM65.1 74.9h2.2v2.2h-2.2zM69.7 74.9h2.2v2.2h-2.2zM74.3 74.9h2.2v2.2h-2.2zM78.9 74.9h2.2v2.2h-2.2zM83.5 74.9h2.2v2.2h-2.2zM88.1 74.9h2.2v2.2h-2.2zM92.7 74.9h2.2v2.2h-2.2zM97.3 74.9h2.2v2.2h-2.2zM101.9 74.9h2.2v2.2h-2.2zM106.5 74.9h2.2v2.2h-2.2zM111.1 74.9h2.2v2.2h-2.2zM115.7 74.9h2.2v2.2h-2.2zM120.3 74.9h2.2v2.2h-2.2zM124.9 74.9h2.2v2.2h-2.2zM124.9 79.5h2.2v2.2h-2.2zM124.9 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94.73h2.2v2.2h-2.2zM71.9 89.9h2.2v2.2h-2.2zM76.23 89.9h2.2v2.2h-2.2zM80.57 89.9h2.2v2.2h-2.2zM84.9 89.9h2.2v2.2h-2.2zM89.23 89.9h2.2v2.2h-2.2zM93.57 89.9h2.2v2.2h-2.2zM97.9 89.9h2.2v2.2h-2.2zM102.23 89.9h2.2v2.2h-2.2zM106.57 89.9h2.2v2.2h-2.2zM110.9 89.9h2.2v2.2h-2.2zM110.9 94.3h2.2v2.2h-2.2zM110.9 98.7h2.2v2.2h-2.2zM110.9 103.1h2.2v2.2h-2.2zM110.9 107.5h2.2v2.2h-2.2zM110.9 111.9h2.2v2.2h-2.2zM115.23 111.9h2.2v2.2h-2.2zM119.57 111.9h2.2v2.2h-2.2zM123.9 111.9h2.2v2.2h-2.2zM128.23 111.9h2.2v2.2h-2.2zM132.57 111.9h2.2v2.2h-2.2zM136.9 111.9h2.2v2.2h-2.2zM136.9 115.9h2.2v2.2h-2.2zM136.9 119.9h2.2v2.2h-2.2z\"\/><path fill=\"#D98296\" d=\"M133.9 119.9h2.2v2.2h-2.2zM138.9 119.9h2.2v2.2h-2.2zM143.9 119.9h2.2v2.2h-2.2zM148.9 119.9h2.2v2.2h-2.2zM153.9 119.9h2.2v2.2h-2.2zM153.9 123.9h2.2v2.2h-2.2zM153.9 127.9h2.2v2.2h-2.2zM148.9 127.9h2.2v2.2h-2.2zM143.9 127.9h2.2v2.2h-2.2zM138.9 127.9h2.2v2.2h-2.2zM133.9 127.9h2.2v2.2h-2.2zM133.9 123.9h2.2v2.2h-2.2zM76.9 49.9h2.2v2.2h-2.2zM81.15 49.9h2.2v2.2h-2.2zM85.4 49.9h2.2v2.2h-2.2zM89.65 49.9h2.2v2.2h-2.2zM93.9 49.9h2.2v2.2h-2.2zM98.15 49.9h2.2v2.2h-2.2zM102.4 49.9h2.2v2.2h-2.2zM106.65 49.9h2.2v2.2h-2.2zM110.9 49.9h2.2v2.2h-2.2zM110.9 54.4h2.2v2.2h-2.2zM110.9 58.9h2.2v2.2h-2.2zM106.65 58.9h2.2v2.2h-2.2zM102.4 58.9h2.2v2.2h-2.2zM98.15 58.9h2.2v2.2h-2.2zM93.9 58.9h2.2v2.2h-2.2zM89.65 58.9h2.2v2.2h-2.2zM85.4 58.9h2.2v2.2h-2.2zM81.15 58.9h2.2v2.2h-2.2zM76.9 58.9h2.2v2.2h-2.2zM76.9 54.4h2.2v2.2h-2.2zM93.9 62.9h2.2v2.2h-2.2zM93.9 66.9h2.2v2.2h-2.2zM93.9 70.9h2.2v2.2h-2.2zM93.9 74.9h2.2v2.2h-2.2zM146.9 139.9h2.2v2.2h-2.2zM144.4 144.07h2.2v2.2h-2.2zM141.9 148.23h2.2v2.2h-2.2zM139.4 152.4h2.2v2.2h-2.2zM136.9 156.57h2.2v2.2h-2.2zM134.4 160.73h2.2v2.2h-2.2zM131.9 164.9h2.2v2.2h-2.2zM131.4 168.9h2.2v2.2h-2.2zM130.9 172.9h2.2v2.2h-2.2zM133.9 177.4h2.2v2.2h-2.2zM136.9 181.9h2.2v2.2h-2.2zM141.9 183.4h2.2v2.2h-2.2zM146.9 184.9h2.2v2.2h-2.2zM151.9 182.9h2.2v2.2h-2.2zM156.9 180.9h2.2v2.2h-2.2zM159.9 176.9h2.2v2.2h-2.2zM162.9 172.9h2.2v2.2h-2.2zM162.4 168.9h2.2v2.2h-2.2zM161.9 164.9h2.2v2.2h-2.2zM159.4 160.73h2.2v2.2h-2.2zM156.9 156.57h2.2v2.2h-2.2zM154.4 152.4h2.2v2.2h-2.2zM151.9 148.23h2.2v2.2h-2.2zM149.4 144.07h2.2v2.2h-2.2z\"\/><path fill=\"#fff\" d=\"M16.9 169.9h2.2v2.2h-2.2zM21.73 169.9h2.2v2.2h-2.2zM26.57 169.9h2.2v2.2h-2.2zM31.4 169.9h2.2v2.2h-2.2zM36.23 169.9h2.2v2.2h-2.2zM41.07 169.9h2.2v2.2h-2.2zM45.9 169.9h2.2v2.2h-2.2zM16.9 179.9h2.2v2.2h-2.2zM21.73 179.9h2.2v2.2h-2.2zM26.57 179.9h2.2v2.2h-2.2zM31.4 179.9h2.2v2.2h-2.2zM36.23 179.9h2.2v2.2h-2.2zM41.07 179.9h2.2v2.2h-2.2zM45.9 179.9h2.2v2.2h-2.2z\"\/><\/svg>\n\n<\/div>\n\n\n\n\n\n<div class=\"gb-text cqop-v6-pannello-96ce454\">Simulate the cost of SOA certification<\/div>\n\n\n\n\n\n<a class=\"gb-text cqop-v6-pulsante-5eba899 cqop-v6-state-6d47db8\" href=\"https:\/\/www.cqop.com\/en\/online-services\/fee-and-requirements-calculation\/\">Calculate fees and requirements<\/a>\n\n<\/div>\n\n<\/div>\n\n<\/div>\n\n\n\n\n\n<div class=\"cqop-v6-pannello-1d12dfc\">\n\n<figure class=\"cqop-v6-pannello-ca9f003\">\n\n<div>\n<img decoding=\"async\" class=\"gb-media-cqv61492 cqop-v6-pannello-e34122a gb-text\" src=\"https:\/\/www.cqop.com\/wp-content\/uploads\/2026\/10\/os3_image2-en.webp\" alt=\"The scope of OS3: water and sanitary systems in hospitals, fire hydrant networks in school buildings, industrial catering kitchens\"\/>\n<\/div>\n\n\n\n\n\n<figcaption class=\"gb-text cqop-v6-pannello-ad07637\">The scope of OS3: water and sanitary systems in hospitals, fire hydrant networks in school buildings, industrial catering kitchens<\/figcaption>\n\n<\/figure>\n\n<\/div>\n\n\n\n\n\n<div class=\"cqop-v6-pannello-13e79de\">\n\n<div class=\"cqop-v6-griglia-74a4c6d\">\n\n<div class=\"cqop-v6-titolo-sticky-1c8b9f9\">\n\n<h2 class=\"gb-text cqop-v6-titolo-ecc189a\">SOA certification OS3: areas of application<\/h2>\n\n<\/div>\n\n\n\n\n\n<div class=\"cqop-v6-pannello-71e1793\">\n<p class=\"gb-text cqop-v6-testo-04d085f\"><strong class=\"cqop-v6-pannello-7f02261\">OS3<\/strong> brings water, gas and fire safety to every type of building. The main sectors:<\/p>\n\n\n\n\n<ul class=\"cqop-v6-pannello-9bf0cf7\">\n\n<li class=\"gb-text cqop-v6-griglia-eaa3518\">\n              <span aria-hidden=\"true\" class=\"cqop-v6-pannello-17317d0\">01<\/span>\n              <span class=\"cqop-v6-pannello-f3665f8\"><strong class=\"cqop-v6-pannello-7f02261\">Water and sanitary systems:<\/strong> hot and cold water networks, drains, sanitary fixtures and taps. They are found in every building.<\/span>\n            <\/li>\n\n\n\n\n<li class=\"gb-text cqop-v6-griglia-d980411\">\n              <span aria-hidden=\"true\" class=\"cqop-v6-pannello-17317d0\">02<\/span>\n              <span class=\"cqop-v6-pannello-f3665f8\"><strong class=\"cqop-v6-pannello-7f02261\">Fire-fighting:<\/strong> hydrants, <strong class=\"cqop-v6-pannello-7f02261\">sprinklers<\/strong>, water mist systems, foam and extinguishers, pumps and reserve tanks. Mandatory in public buildings and in activities subject to Fire Brigade inspection.<\/span>\n            <\/li>\n\n\n\n\n<li class=\"gb-text cqop-v6-griglia-d980411\">\n              <span aria-hidden=\"true\" class=\"cqop-v6-pannello-17317d0\">03<\/span>\n              <span class=\"cqop-v6-pannello-f3665f8\"><strong class=\"cqop-v6-pannello-7f02261\">Gas:<\/strong> methane and LPG networks inside buildings and connections for cookers, boilers and water heaters.<\/span>\n            <\/li>\n\n\n\n\n\n<li class=\"gb-text cqop-v6-griglia-d980411\">\n              <span aria-hidden=\"true\" class=\"cqop-v6-pannello-17317d0\">04<\/span>\n              <span class=\"cqop-v6-pannello-f3665f8\"><strong class=\"cqop-v6-pannello-7f02261\">Industrial kitchens:<\/strong> complete kitchens for hospitals, schools, canteens and hotels, with cooking lines, hoods, dishwashers and cold rooms.<\/span>\n            <\/li>\n\n\n\n\n\n<li class=\"gb-text cqop-v6-griglia-d980411\">\n              <span aria-hidden=\"true\" class=\"cqop-v6-pannello-17317d0\">05<\/span>\n              <span class=\"cqop-v6-pannello-f3665f8\"><strong class=\"cqop-v6-pannello-7f02261\">Professional laundries:<\/strong> industrial washing machines, ironers, dryers and water recovery systems for hospitals and hotels.<\/span>\n            <\/li>\n\n\n\n\n\n<li class=\"gb-text cqop-v6-griglia-d980411\">\n              <span aria-hidden=\"true\" class=\"cqop-v6-pannello-17317d0\">06<\/span>\n              <span class=\"cqop-v6-pannello-f3665f8\"><strong class=\"cqop-v6-pannello-7f02261\">Water treatment:<\/strong> softeners, filters, reverse osmosis and disinfection systems.<\/span>\n            <\/li>\n\n\n\n\n\n<li class=\"gb-text cqop-v6-griglia-d980411\">\n              <span aria-hidden=\"true\" class=\"cqop-v6-pannello-17317d0\">07<\/span>\n              <span class=\"cqop-v6-pannello-f3665f8\"><strong class=\"cqop-v6-pannello-7f02261\">Legionella prevention:<\/strong> hot water recirculation, disinfection and temperature control, essential in hospitals, care homes and hotels.<\/span>\n            <\/li>\n\n\n\n\n\n<li class=\"gb-text cqop-v6-griglia-8357285\">\n              <span aria-hidden=\"true\" class=\"cqop-v6-pannello-17317d0\">08<\/span>\n              <span class=\"cqop-v6-pannello-f3665f8\"><strong class=\"cqop-v6-pannello-7f02261\">Remote control:<\/strong> remote monitoring of water consumption and fire-fighting networks.<\/span>\n            <\/li>\n\n<\/ul>\n\n\n\n\n<p class=\"gb-text cqop-v6-testo-930206b\"><strong class=\"cqop-v6-pannello-7f02261\">In short:<\/strong> OS3 is the category of <strong class=\"cqop-v6-pannello-962ca18\">water safety in buildings<\/strong>.<\/p>\n<\/div>\n\n<\/div>\n\n<\/div>\n\n\n\n\n\n<div class=\"cqop-v6-pannello-1d12dfc\">\n\n<figure class=\"cqop-v6-pannello-ca9f003\">\n\n<div>\n<img decoding=\"async\" class=\"gb-media-cqv61513 cqop-v6-pannello-e34122a gb-text\" src=\"https:\/\/www.cqop.com\/wp-content\/uploads\/2026\/10\/os3_image3-en.webp\" alt=\"UNI EN 12845 sprinkler fire-fighting system: reserve tank, pressurisation unit, false-ceiling network with automatically activated sprinklers\"\/>\n<\/div>\n\n\n\n\n\n<figcaption class=\"gb-text cqop-v6-pannello-ad07637\">UNI EN 12845 sprinkler fire-fighting system: reserve tank, pressurisation unit, false-ceiling network with automatically activated sprinklers<\/figcaption>\n\n<\/figure>\n\n<\/div>\n\n\n\n\n\n<div class=\"cqop-v6-pannello-13e79de\">\n\n<div class=\"cqop-v6-contenuto-c7714c8\">\n\n<h2 class=\"gb-text cqop-v6-titolo-e915111\">SOA categories related to OS3<\/h2>\n\n\n\n\n\n<div class=\"cqop-v6-griglia-86cb130\">\n\n<div class=\"cqop-v6-pannello-12843ab\">\n\n<div class=\"gb-text cqop-v6-pannello-c59b2ea\">OG11<\/div>\n\n\n\n\n\n<div class=\"gb-text cqop-v6-pannello-0986e53\">Technological systems<\/div>\n\n\n\n\n\n<p class=\"gb-text cqop-v6-testo-8d82677\">groups together OS3, OS28 and OS30. Companies holding OG11 can carry out OS3 works in the same classification.<\/p>\n\n<\/div>\n\n\n\n\n\n<div class=\"cqop-v6-pannello-12843ab\">\n\n<div class=\"gb-text cqop-v6-pannello-c59b2ea\">OS28<\/div>\n\n\n\n\n\n<div class=\"gb-text cqop-v6-pannello-0986e53\">Heating and air-conditioning systems<\/div>\n\n\n\n\n<p class=\"gb-text cqop-v6-testo-8d82677\">deals with <strong class=\"cqop-v6-pannello-7f02261\">hot water production<\/strong> (boilers, <strong class=\"cqop-v6-pannello-7f02261\">heat pumps<\/strong>); OS3 with the <strong class=\"cqop-v6-pannello-7f02261\">network that distributes it<\/strong>. Together they cover the whole cycle.<\/p>\n<\/div>\n\n\n\n\n\n<div class=\"cqop-v6-pannello-12843ab\">\n\n<div class=\"gb-text cqop-v6-pannello-c59b2ea\">OS30<\/div>\n\n\n\n\n\n<div class=\"gb-text cqop-v6-pannello-0986e53\">Internal electrical systems<\/div>\n\n\n\n\n<p class=\"gb-text cqop-v6-testo-8d82677\">overlaps with OS3 in <strong class=\"cqop-v6-pannello-7f02261\">electrical fire-fighting systems<\/strong> and in the <strong class=\"cqop-v6-pannello-7f02261\">power supply<\/strong> to pumps, kitchens and laundries.<\/p>\n<\/div>\n\n\n\n\n\n<div class=\"cqop-v6-pannello-12843ab\">\n\n<div class=\"gb-text cqop-v6-pannello-c59b2ea\">OG1<\/div>\n\n\n\n\n\n<div class=\"gb-text cqop-v6-pannello-0986e53\">Civil and industrial buildings<\/div>\n\n\n\n\n<p class=\"gb-text cqop-v6-testo-8d82677\">is often the <strong class=\"cqop-v6-pannello-7f02261\">prevailing category<\/strong> in contracts where OS3 can be separated out, for example Community Houses.<\/p>\n<\/div>\n\n\n\n\n\n<div class=\"cqop-v6-pannello-12843ab\">\n\n<div class=\"gb-text cqop-v6-pannello-c59b2ea\">OG2<\/div>\n\n\n\n\n\n<div class=\"gb-text cqop-v6-pannello-0986e53\">Restoration and maintenance of protected real estate<\/div>\n\n\n\n\n<p class=\"gb-text cqop-v6-testo-8d82677\">works alongside OS3 in <strong class=\"cqop-v6-pannello-7f02261\">listed historic buildings<\/strong> that need to be upgraded with water and fire-fighting systems.<\/p>\n<\/div>\n\n\n\n\n\n<div class=\"cqop-v6-pannello-12843ab\">\n\n<div class=\"gb-text cqop-v6-pannello-c59b2ea\">OG6<\/div>\n\n\n\n\n\n<div class=\"gb-text cqop-v6-pannello-0986e53\">Water mains, gas pipelines, oil pipelines, irrigation and drainage works<\/div>\n\n\n\n\n<p class=\"gb-text cqop-v6-testo-8d82677\">brings water and gas <strong class=\"cqop-v6-pannello-7f02261\">up to the building<\/strong>; from there on, <strong class=\"cqop-v6-pannello-7f02261\">inside<\/strong>, OS3 takes over.<\/p>\n<\/div>\n\n\n\n\n\n<div class=\"cqop-v6-pannello-12843ab\">\n\n<div class=\"gb-text cqop-v6-pannello-c59b2ea\">OS14<\/div>\n\n\n\n\n\n<div class=\"gb-text cqop-v6-pannello-0986e53\">Waste disposal and recovery plants<\/div>\n\n\n\n\n<p class=\"gb-text cqop-v6-testo-8d82677\">deals with <strong class=\"cqop-v6-pannello-7f02261\">actual treatment plants<\/strong>; OS3 only with pre-treatment in the individual building.<\/p>\n<\/div>\n\n\n\n\n\n<div class=\"cqop-v6-pannello-12843ab\">\n\n<div class=\"gb-text cqop-v6-pannello-c59b2ea\">OS22<\/div>\n\n\n\n\n\n<div class=\"gb-text cqop-v6-pannello-0986e53\">Water treatment and purification plants<\/div>\n\n\n\n\n<p class=\"gb-text cqop-v6-testo-8d82677\">builds <strong class=\"cqop-v6-pannello-7f02261\">large water treatment plants<\/strong>; OS3 the small filtration systems <strong class=\"cqop-v6-pannello-7f02261\">inside<\/strong> buildings.<\/p>\n<\/div>\n\n<\/div>\n\n<\/div>\n\n<\/div>\n\n\n\n\n\n<div class=\"cqop-v6-pannello-1d12dfc\">\n\n<figure class=\"cqop-v6-pannello-ca9f003\">\n\n<div>\n<img decoding=\"async\" class=\"gb-media-cqv61554 cqop-v6-pannello-e34122a gb-text\" src=\"https:\/\/www.cqop.com\/wp-content\/uploads\/2026\/10\/os3_image4-en.webp\" alt=\"Industrial catering kitchen: extractor hood with filters, cooking line with hotplates\/oven\/bain-marie, professional dishwasher, gas\/water\/drain connections\"\/>\n<\/div>\n\n\n\n\n\n<figcaption class=\"gb-text cqop-v6-pannello-ad07637\">Industrial catering kitchen: extractor hood with filters, cooking line with hotplates\/oven\/bain-marie, professional dishwasher, gas\/water\/drain connections<\/figcaption>\n\n<\/figure>\n\n<\/div>\n\n\n\n\n\n<div class=\"cqop-v6-pannello-13e79de\">\n\n<div class=\"cqop-v6-griglia-74a4c6d\">\n\n<div class=\"cqop-v6-titolo-sticky-1c8b9f9\">\n\n<h2 class=\"gb-text cqop-v6-titolo-ecc189a\">Why it pays to qualify in OS3<\/h2>\n\n<\/div>\n\n\n\n\n\n<div class=\"cqop-v6-pannello-71e1793\">\n<p class=\"gb-text cqop-category-conclusion-accent cqop-v6-testo-3c2b5d5\"><strong class=\"cqop-v6-pannello-7f02261\">OS3<\/strong> has a very large market ahead of it, supported by <strong class=\"cqop-v6-pannello-7f02261\">four public investment streams<\/strong>:<br>\u00b7 the <strong class=\"cqop-v6-pannello-7f02261\">Health<\/strong> for Community Houses, Community Hospitals and new hospital beds;<br>\u00b7 the <strong class=\"cqop-v6-pannello-7f02261\">fire-safety upgrading of schools<\/strong>;<br>\u00b7 the <strong class=\"cqop-v6-pannello-7f02261\">Safe and Sustainable Hospital<\/strong> programme;<br>\u00b7 the <strong class=\"cqop-v6-pannello-7f02261\">maintenance<\/strong> of public buildings, with thousands of fire-safety certifications expiring every year.<\/p>\n<\/div>\n\n<\/div>\n\n<\/div>\n\n\n\n\n\n<div class=\"cqop-v6-pannello-481eee7\" id=\"faq\">\n\n<div class=\"cqop-v6-griglia-28a732f\">\n\n<div>\n\n<h2 class=\"gb-text cqop-v6-titolo-2c72ce6\">SOA category OS3: frequently asked questions<\/h2>\n\n\n\n\n\n<div class=\"cqop-category-download cqop-category-download-minimal cqop-category-download-faq\">\n<a class=\"gb-text cqop-category-download-button\" href=\"https:\/\/www.cqop.com\/wp-content\/uploads\/2026\/10\/schede-tecniche-soa-strutturate-1.pdf\" target=\"_blank\" rel=\"noopener noreferrer\" aria-label=\"Download PDF technical data sheets \u2014 opens in a new tab\">\n<svg role=\"presentation\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"22\" height=\"22\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"1.7\" stroke-linecap=\"round\" stroke-linejoin=\"round\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M12 3v12m-5-5 5 5 5-5M4 16v5h16v-5\"><\/path><\/svg>\n\n\n<span class=\"gb-text\">Download PDF technical data sheets<\/span>\n<\/a>\n<\/div>\n\n<\/div>\n\n\n\n\n\n<div>\n\n<div class=\"wp-block-essential-blocks-accordion cqop-faq-accordion  root-cqop-faq-96007-0\"><div class=\"eb-parent-wrapper eb-parent-cqop-faq-96007-0 \"><div class=\"eb-accordion-container cqop-faq-96007-0\" data-accordion-type=\"accordion\" data-tab-icon=\"\" data-expanded-icon=\"\" data-transition-duration=\"500\"><div class=\"eb-accordion-inner\">\n\n<div class=\"wp-block-essential-blocks-accordion-item cqop-faq-96007-0-1 eb-accordion-wrapper\" data-clickable=\"false\"><div class=\"eb-accordion-title-wrapper eb-accordion-title-wrapper-cqop-faq-96007-0\" tabindex=\"0\"><div class=\"eb-accordion-title-content-wrap title-content-cqop-faq-96007-0\"><h2 class=\"eb-accordion-title\">What is the official description of category OS3?<\/h2><\/div><\/div><div class=\"eb-accordion-content-wrapper eb-accordion-content-wrapper-cqop-faq-96007-0\"><div class=\"eb-accordion-content\">\n\n<div class=\"gb-text cqop-faq-answer\"><div class=\"cqop-v6-pannello-f38d055 gb-text\">OS3 \u201cconcerns the supply, installation and maintenance or renovation of water and sanitary systems, kitchens, laundries, gas and fire-fighting systems, whatever their degree of importance, complete with all related masonry, complementary or ancillary works, to be carried out in general works that have already been completed or are under construction\u201d.<\/div><\/div>\n\n<\/div><\/div><\/div>\n\n\n\n\n\n<div class=\"wp-block-essential-blocks-accordion-item cqop-faq-96007-0-3 eb-accordion-wrapper\" data-clickable=\"false\"><div class=\"eb-accordion-title-wrapper eb-accordion-title-wrapper-cqop-faq-96007-0\" tabindex=\"0\"><div class=\"eb-accordion-title-content-wrap title-content-cqop-faq-96007-0\"><h2 class=\"eb-accordion-title\">What are the main technical standards for fire-fighting?<\/h2><\/div><\/div><div class=\"eb-accordion-content-wrapper eb-accordion-content-wrapper-cqop-faq-96007-0\"><div class=\"eb-accordion-content\">\n\n<div class=\"gb-text cqop-faq-answer\"><div class=\"cqop-v6-pannello-5afcd04 gb-text\">UNI EN 12845 for sprinklers, UNI 10779 for hydrant networks and UNI\/TS 11559 for dry hydrants, as well as Ministerial Decree of 20\/12\/2012 and Presidential Decree 151\/2011.<\/div><\/div>\n\n<\/div><\/div><\/div>\n\n\n\n\n\n<div class=\"wp-block-essential-blocks-accordion-item cqop-faq-96007-0-4 eb-accordion-wrapper\" data-clickable=\"false\"><div class=\"eb-accordion-title-wrapper eb-accordion-title-wrapper-cqop-faq-96007-0\" tabindex=\"0\"><div class=\"eb-accordion-title-content-wrap title-content-cqop-faq-96007-0\"><h2 class=\"eb-accordion-title\">What is the difference between OS3 and OG6?<\/h2><\/div><\/div><div class=\"eb-accordion-content-wrapper eb-accordion-content-wrapper-cqop-faq-96007-0\"><div class=\"eb-accordion-content\">\n\n<div class=\"gb-text cqop-faq-answer\"><div class=\"cqop-v6-pannello-5afcd04 gb-text\">The boundary is the meter. OG6 covers external networks (water mains, gas pipelines); OS3 everything inside the building.<\/div><\/div>\n\n<\/div><\/div><\/div>\n\n\n\n\n\n<div class=\"wp-block-essential-blocks-accordion-item cqop-faq-96007-0-5 eb-accordion-wrapper\" data-clickable=\"false\"><div class=\"eb-accordion-title-wrapper eb-accordion-title-wrapper-cqop-faq-96007-0\" tabindex=\"0\"><div class=\"eb-accordion-title-content-wrap title-content-cqop-faq-96007-0\"><h2 class=\"eb-accordion-title\">Which works count as CEL for OS3?<\/h2><\/div><\/div><div class=\"eb-accordion-content-wrapper eb-accordion-content-wrapper-cqop-faq-96007-0\"><div class=\"eb-accordion-content\">\n\n<div class=\"gb-text cqop-faq-answer\"><div class=\"cqop-v6-pannello-5afcd04 gb-text\">Water and drainage networks, fire-fighting systems, industrial kitchens, laundries, gas networks and legionella prevention. The mere supply of sanitary fixtures or minor maintenance might not be recognised: it is best to ask the client for detailed CELs.<\/div><\/div>\n\n<\/div><\/div><\/div>\n\n<\/div><\/div><\/div><\/div>\n\n<\/div>\n\n<\/div>\n\n<\/div>\n\n\n\n\n\n<div class=\"cqop-v6-pannello-5e842af\">\n\n<svg focusable=\"false\" role=\"presentation\" aria-hidden=\"true\" class=\"cqop-v6-icona-71ff866\">\n      <defs>\n        <pattern id=\"mattoniOS3\" width=\"72\" height=\"36\" patternUnits=\"userSpaceOnUse\">\n          <rect x=\"0\" y=\"2\" width=\"32\" height=\"14\" fill=\"rgba(255,255,255,0.022)\"><\/rect>\n          <rect x=\"36\" y=\"2\" width=\"32\" height=\"14\" fill=\"rgba(255,255,255,0.022)\"><\/rect>\n          <rect x=\"18\" y=\"20\" width=\"32\" height=\"14\" fill=\"rgba(255,255,255,0.022)\"><\/rect>\n          <rect x=\"-18\" y=\"20\" width=\"32\" height=\"14\" fill=\"rgba(255,255,255,0.022)\"><\/rect>\n          <rect x=\"54\" y=\"20\" width=\"32\" height=\"14\" fill=\"rgba(255,255,255,0.022)\"><\/rect>\n        <\/pattern>\n      <\/defs>\n      <rect width=\"100%\" height=\"100%\" fill=\"url(#mattoniOS3)\"><\/rect>\n    <\/svg>\n\n\n\n\n\n<div class=\"cqop-v6-griglia-7a21026\">\n\n<div>\n\n<h2 class=\"gb-text cqop-v6-titolo-1522a9c\">Your next move?<\/h2>\n\n\n\n\n<p class=\"gb-text cqop-v6-testo-2d399db\"><strong class=\"cqop-v6-pannello-cff7b97\">Demonstrate your requirements<\/strong> and turn this knowledge into action: make sure you have the right SOA qualification and don\u2019t hesitate to invest in training and innovation.<\/p>\n<\/div>\n\n\n\n\n\n<div class=\"cqop-v6-pannello-4cdb9ad\">\n\n<a class=\"gb-text cqop-v6-pulsante-5eba899 cqop-v6-state-f859560\" href=\"https:\/\/www.cqop.com\/en\/contacts\/\">Contact us<\/a>\n\n\n\n\n\n<a class=\"gb-text cqop-v6-pulsante-0678f05 cqop-v6-state-b958ab0\" href=\"https:\/\/www.cqop.com\/en\/online-services\/fee-and-requirements-calculation\/\">Calculate fees and requirements<\/a>\n\n<\/div>\n\n<\/div>\n\n<\/div>\n\n<\/div>\n\n","protected":false},"excerpt":{"rendered":"<p>OS3 Specialised works categories SOA category OS3 Water and sanitary systems, kitchens, laundries OS3 covers water, sanitary, gas and fire-fighting systems, industrial kitchens and professional laundries: supply, installation, maintenance and renovation. Simulate the cost of SOA certification Calculate fees and requirementsThe scope of OS3: water and sanitary systems in hospitals, fire hydrant networks in school &#8230; <a title=\"SOA category OS3\" class=\"read-more\" href=\"https:\/\/www.cqop.com\/en\/list-of-soa-categories\/specialised-works\/os3\/\" aria-label=\"Read more about SOA category OS3\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":920978,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"_eb_attr":"","_eb_data_table":"","footnotes":""},"class_list":["post-920979","page","type-page","status-publish"],"acf":{"h1_seo":""},"publishpress_future_workflow_manual_trigger":{"enabledWorkflows":[]},"_links":{"self":[{"href":"https:\/\/www.cqop.com\/en\/wp-json\/wp\/v2\/pages\/920979","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.cqop.com\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.cqop.com\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.cqop.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.cqop.com\/en\/wp-json\/wp\/v2\/comments?post=920979"}],"version-history":[{"count":8,"href":"https:\/\/www.cqop.com\/en\/wp-json\/wp\/v2\/pages\/920979\/revisions"}],"predecessor-version":[{"id":922314,"href":"https:\/\/www.cqop.com\/en\/wp-json\/wp\/v2\/pages\/920979\/revisions\/922314"}],"up":[{"embeddable":true,"href":"https:\/\/www.cqop.com\/en\/wp-json\/wp\/v2\/pages\/920978"}],"wp:attachment":[{"href":"https:\/\/www.cqop.com\/en\/wp-json\/wp\/v2\/media?parent=920979"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}