{"id":170,"date":"2017-09-15T16:31:33","date_gmt":"2017-09-15T16:31:33","guid":{"rendered":"https:\/\/staging3.rjurmson.com\/nationalhygieneservices\/nationalhygieneservicesc\/portfolio-items\/electrical-install-001\/"},"modified":"2026-02-11T12:32:23","modified_gmt":"2026-02-11T12:32:23","slug":"cold-water-storage-tanks","status":"publish","type":"avada_portfolio","link":"https:\/\/rjurmson.com\/nationalhygieneservices\/projects\/cold-water-storage-tanks\/","title":{"rendered":"Cold water storage tanks"},"content":{"rendered":"<p><div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-1 fusion-flex-container nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"--awb-background-repeat:repeat-x;--awb-border-radius-top-left:0px;--awb-border-radius-top-right:0px;--awb-border-radius-bottom-right:0px;--awb-border-radius-bottom-left:0px;--awb-padding-top:6%;--awb-padding-bottom:3%;--awb-flex-wrap:wrap;\" ><div class=\"fusion-builder-row fusion-row fusion-flex-align-items-center fusion-flex-justify-content-center fusion-flex-content-wrap\" style=\"max-width:1372.8px;margin-left: calc(-4% \/ 2 );margin-right: calc(-4% \/ 2 );\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-0 fusion_builder_column_1_2 1_2 fusion-flex-column fusion-animated\" style=\"--awb-bg-blend:overlay;--awb-bg-size:cover;--awb-width-large:50%;--awb-margin-top-large:20px;--awb-spacing-right-large:3.84%;--awb-margin-bottom-large:20px;--awb-spacing-left-large:3.84%;--awb-width-medium:50%;--awb-spacing-right-medium:3.84%;--awb-spacing-left-medium:3.84%;--awb-width-small:100%;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\" data-animationType=\"fadeInLeft\" data-animationDuration=\"1.6\" data-animationOffset=\"top-into-view\"><div class=\"fusion-column-wrapper fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-text fusion-text-1\"><h3><strong><span class=\"TextRun SCXW4616109 BCX0\" lang=\"EN-GB\" xml:lang=\"EN-GB\" data-contrast=\"auto\"><span class=\"NormalTextRun SCXW4616109 BCX0\">Cold Water Storage Tank Cleaning &amp; Chlorination<\/span><\/span><\/strong><\/h3>\n<p><span data-contrast=\"auto\">Cold water\u00a0storage tanks\u00a0(CWST)\u00a0must be regularly inspected,\u00a0cleaned\u00a0and disinfected to control sediment,\u00a0biofilm\u00a0and Legionella risk.\u00a0At National Hygiene Serviced Ltd, we\u00a0provide professional CWST cleaning, chlorination, temperature monitoring and remedial works using trained engineers, calibrated\u00a0equipment\u00a0and UKAS-accredited water analysis to\u00a0maintain\u00a0safe, compliant water storage systems.<\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/p>\n<\/div><\/div><\/div><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-1 fusion_builder_column_1_2 1_2 fusion-flex-column fusion-animated\" style=\"--awb-bg-blend:overlay;--awb-bg-size:cover;--awb-width-large:50%;--awb-margin-top-large:20px;--awb-spacing-right-large:3.84%;--awb-margin-bottom-large:20px;--awb-spacing-left-large:3.84%;--awb-width-medium:50%;--awb-spacing-right-medium:3.84%;--awb-spacing-left-medium:3.84%;--awb-width-small:100%;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\" data-animationType=\"fadeInRight\" data-animationDuration=\"1.6\" data-animationOffset=\"top-into-view\"><div class=\"fusion-column-wrapper fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-image-element \" style=\"--awb-caption-title-font-family:var(--h2_typography-font-family);--awb-caption-title-font-weight:var(--h2_typography-font-weight);--awb-caption-title-font-style:var(--h2_typography-font-style);--awb-caption-title-size:var(--h2_typography-font-size);--awb-caption-title-transform:var(--h2_typography-text-transform);--awb-caption-title-line-height:var(--h2_typography-line-height);--awb-caption-title-letter-spacing:var(--h2_typography-letter-spacing);\"><span class=\" fusion-imageframe imageframe-none imageframe-1 hover-type-none\" style=\"border-radius:8px;\"><img decoding=\"async\" width=\"1920\" height=\"1272\" alt=\"Cold water storage tanks\" title=\"NHS Water Splash\" src=\"https:\/\/rjurmson.com\/nationalhygieneservices\/wp-content\/uploads\/2017\/09\/NHS-Water-Splash.jpg\" class=\"img-responsive wp-image-3518\" srcset=\"https:\/\/rjurmson.com\/nationalhygieneservices\/wp-content\/uploads\/2017\/09\/NHS-Water-Splash-200x133.jpg 200w, https:\/\/rjurmson.com\/nationalhygieneservices\/wp-content\/uploads\/2017\/09\/NHS-Water-Splash-400x265.jpg 400w, https:\/\/rjurmson.com\/nationalhygieneservices\/wp-content\/uploads\/2017\/09\/NHS-Water-Splash-600x398.jpg 600w, https:\/\/rjurmson.com\/nationalhygieneservices\/wp-content\/uploads\/2017\/09\/NHS-Water-Splash-800x530.jpg 800w, https:\/\/rjurmson.com\/nationalhygieneservices\/wp-content\/uploads\/2017\/09\/NHS-Water-Splash-1200x795.jpg 1200w, https:\/\/rjurmson.com\/nationalhygieneservices\/wp-content\/uploads\/2017\/09\/NHS-Water-Splash.jpg 1920w\" sizes=\"(max-width: 640px) 100vw, 800px\" \/><\/span><\/div><\/div><\/div><\/div><\/div><div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-2 fusion-flex-container has-pattern-background has-mask-background nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"--awb-border-radius-top-left:0px;--awb-border-radius-top-right:0px;--awb-border-radius-bottom-right:0px;--awb-border-radius-bottom-left:0px;--awb-flex-wrap:wrap;\" ><div class=\"fusion-builder-row fusion-row fusion-flex-align-items-flex-start fusion-flex-content-wrap\" style=\"max-width:1372.8px;margin-left: calc(-4% \/ 2 );margin-right: calc(-4% \/ 2 );\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-2 fusion_builder_column_1_1 1_1 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:100%;--awb-margin-top-large:20px;--awb-spacing-right-large:1.92%;--awb-margin-bottom-large:20px;--awb-spacing-left-large:1.92%;--awb-width-medium:100%;--awb-order-medium:0;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-order-small:0;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-text fusion-text-2\"><h3><b><span data-contrast=\"auto\">What Are Cold Water Storage Tanks (CWST)?<\/span><\/b><span data-ccp-props=\"{}\">\u00a0<\/span><\/h3>\n<p><span data-contrast=\"auto\">Cold water\u00a0storage tanks supply water to sinks, wash hand basins, showers,\u00a0toilets\u00a0and other outlets across a wide range of buildings. Because stored water can stagnate and warm over time, these systems require regular inspection,\u00a0cleaning\u00a0and disinfection to remain safe.<\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/p>\n<p><b><span data-contrast=\"auto\">Important:<\/span><\/b><span data-contrast=\"auto\">\u00a0During warmer summer months,\u00a0cold water\u00a0temperatures can rise above the recommended maximum of 20\u00b0C, increasing the risk of bacterial growth.\u00a0Additional\u00a0monitoring and checks may be\u00a0required\u00a0during these periods.<\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/p>\n<h3><b><span data-contrast=\"auto\">Why CWST Cleaning &amp; Chlorination Is Essential<\/span><\/b><span data-ccp-props=\"{}\">\u00a0<\/span><\/h3>\n<p><span data-contrast=\"auto\">Without routine maintenance,\u00a0cold water\u00a0storage tanks can accumulate:<\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/p>\n<ul>\n<li aria-setsize=\"-1\" data-leveltext=\"\uf0b7\" data-font=\"Symbol\" data-listid=\"10\" data-list-defn-props=\"{\" data-aria-posinset=\"1\" data-aria-level=\"1\"><span data-contrast=\"auto\">Sludge and sediment<\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/li>\n<\/ul>\n<ul>\n<li aria-setsize=\"-1\" data-leveltext=\"\uf0b7\" data-font=\"Symbol\" data-listid=\"10\" data-list-defn-props=\"{\" data-aria-posinset=\"2\" data-aria-level=\"1\"><span data-contrast=\"auto\">Scale deposits<\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/li>\n<\/ul>\n<ul>\n<li aria-setsize=\"-1\" data-leveltext=\"\uf0b7\" data-font=\"Symbol\" data-listid=\"10\" data-list-defn-props=\"{\" data-aria-posinset=\"3\" data-aria-level=\"1\"><span data-contrast=\"auto\">Biofilm build-up<\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/li>\n<\/ul>\n<p><span data-contrast=\"auto\">These conditions create an ideal environment for\u00a0<\/span><a href=\"https:\/\/rjurmson.com\/nationalhygieneservices\/projects\/legionella-risk-assessments\/\"><span data-contrast=\"none\">Legionella bacteria<\/span><\/a><span data-contrast=\"auto\">\u00a0to grow. Biofilm and scale can also shield bacteria from disinfectants, making effective cleaning and chlorination critical for water safety.<\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"auto\">Annual cleaning and disinfection,\u00a0or more\u00a0frequently\u00a0as dictated by risk,\u00a0is a key control measure within water safety management plans.<\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/p>\n<\/div><\/div><\/div><\/div><\/div><div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-3 fusion-flex-container nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"--awb-background-repeat:repeat-x;--awb-border-radius-top-left:0px;--awb-border-radius-top-right:0px;--awb-border-radius-bottom-right:0px;--awb-border-radius-bottom-left:0px;--awb-padding-top:3%;--awb-padding-bottom:6%;--awb-flex-wrap:wrap;\" ><div class=\"fusion-builder-row fusion-row fusion-flex-align-items-flex-start fusion-flex-justify-content-center fusion-flex-content-wrap\" style=\"max-width:1372.8px;margin-left: calc(-4% \/ 2 );margin-right: calc(-4% \/ 2 );\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-3 fusion_builder_column_2_3 2_3 fusion-flex-column\" style=\"--awb-bg-blend:overlay;--awb-bg-size:cover;--awb-width-large:66.666666666667%;--awb-margin-top-large:20px;--awb-spacing-right-large:2.88%;--awb-margin-bottom-large:20px;--awb-spacing-left-large:2.88%;--awb-width-medium:66.666666666667%;--awb-spacing-right-medium:2.88%;--awb-spacing-left-medium:2.88%;--awb-width-small:100%;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\"><div class=\"fusion-column-wrapper fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-reading-box-container reading-box-container-1\" style=\"--awb-title-color:var(--awb-color2);--awb-margin-top:0px;--awb-margin-bottom:20px;\"><div class=\"reading-box\" style=\"background-color:var(--awb-color8);border-width:0px;border-color:hsla(var(--awb-color8-h),var(--awb-color8-s),var(--awb-color8-l),calc(var(--awb-color8-a) - 100%));border-left-width:3px;border-left-color:var(--primary_color);border-style:solid;\"><div class=\"reading-box-additional\">\n<p>Our operatives are not only fully trained in water tank cleaning and tank chlorination, but also in ensuring the safety of everyone whilst cleaning is carried out. All engineers carry the CSCS passport to safety and are all enhanced DBS checked to ensure confidence when working on site and in areas with vulnerable people<\/p>\n<\/div><div class=\"fusion-clearfix\"><\/div><\/div><\/div><div class=\"fusion-title title fusion-title-1 fusion-sep-none fusion-title-text fusion-title-size-three\"><h3 class=\"fusion-title-heading title-heading-left fusion-responsive-typography-calculated\" style=\"margin:0;--fontSize:32;line-height:1.26;\"><strong>Our cold water storage tank cleaning &amp; chlorination maintenance service includes:<\/strong><\/h3><\/div><ul style=\"--awb-margin-bottom:2rem;--awb-line-height:34px;--awb-icon-width:34px;--awb-icon-height:34px;--awb-icon-margin:14px;--awb-content-margin:48px;\" class=\"fusion-checklist fusion-checklist-1 fusion-checklist-default type-icons\"><li class=\"fusion-li-item\" style=\"\"><span class=\"icon-wrapper circle-no\"><i class=\"fusion-li-icon fa-bolt fas\" aria-hidden=\"true\"><\/i><\/span><div class=\"fusion-li-item-content\">\n<p>Cleaning of CWST if required \/ requested<\/p>\n<\/div><\/li><li class=\"fusion-li-item\" style=\"\"><span class=\"icon-wrapper circle-no\"><i class=\"fusion-li-icon fa-bolt fas\" aria-hidden=\"true\"><\/i><\/span><div class=\"fusion-li-item-content\">\n<p>Chlorination of CWST<\/p>\n<\/div><\/li><li class=\"fusion-li-item\" style=\"\"><span class=\"icon-wrapper circle-no\"><i class=\"fusion-li-icon fa-bolt fas\" aria-hidden=\"true\"><\/i><\/span><div class=\"fusion-li-item-content\">\n<p>Chlorination of all hot and cold domestic services (if required)<\/p>\n<\/div><\/li><li class=\"fusion-li-item\" style=\"\"><span class=\"icon-wrapper circle-no\"><i class=\"fusion-li-icon fa-bolt fas\" aria-hidden=\"true\"><\/i><\/span><div class=\"fusion-li-item-content\">\n<p>CWST tank survey<\/p>\n<\/div><\/li><li class=\"fusion-li-item\" style=\"\"><span class=\"icon-wrapper circle-no\"><i class=\"fusion-li-icon fa-bolt fas\" aria-hidden=\"true\"><\/i><\/span><div class=\"fusion-li-item-content\">\n<p>Samples of incoming mains and CWST water<\/p>\n<\/div><\/li><li class=\"fusion-li-item\" style=\"\"><span class=\"icon-wrapper circle-no\"><i class=\"fusion-li-icon fa-bolt fas\" aria-hidden=\"true\"><\/i><\/span><div class=\"fusion-li-item-content\">\n<p>Replace damaged fibre lagging<\/p>\n<\/div><\/li><li class=\"fusion-li-item\" style=\"\"><span class=\"icon-wrapper circle-no\"><i class=\"fusion-li-icon fa-bolt fas\" aria-hidden=\"true\"><\/i><\/span><div class=\"fusion-li-item-content\">\n<p>Replace rodent screens<\/p>\n<\/div><\/li><li class=\"fusion-li-item\" style=\"\"><span class=\"icon-wrapper circle-no\"><i class=\"fusion-li-icon fa-bolt fas\" aria-hidden=\"true\"><\/i><\/span><div class=\"fusion-li-item-content\">\n<p>Replace ballcock valves<\/p>\n<\/div><\/li><li class=\"fusion-li-item\" style=\"\"><span class=\"icon-wrapper circle-no\"><i class=\"fusion-li-icon fa-bolt fas\" aria-hidden=\"true\"><\/i><\/span><div class=\"fusion-li-item-content\">\n<p>Replace overflow pipes<\/p>\n<\/div><\/li><li class=\"fusion-li-item\" style=\"\"><span class=\"icon-wrapper circle-no\"><i class=\"fusion-li-icon fa-bolt fas\" aria-hidden=\"true\"><\/i><\/span><div class=\"fusion-li-item-content\">\n<p>Temperature check of CWST water<\/p>\n<\/div><\/li><\/ul><div class=\"fusion-text fusion-text-3\"><h3><strong><span class=\"NormalTextRun SCXW221155046 BCX0\">Why Choose\u00a0<\/span><span class=\"NormalTextRun ContextualSpellingAndGrammarErrorV2Themed SCXW221155046 BCX0\">Us?<\/span><\/strong><\/h3>\n<p>Our collaborative and proactive approach drives efficiency, cost savings and offers our clients peace of mind. We are committed to continuous improvement, through innovation and investment in our personnel, methodologies and equipment.<\/p>\n<p>We offer extremely competitive rates and daytime, evenings or weekends to offer minimal disturbance to our customers.<\/p>\n<\/div><div class=\"fusion-text fusion-text-4\"><h3><b><span data-contrast=\"auto\">FAQ\u2019s<\/span><\/b><span data-ccp-props=\"{}\">\u00a0<\/span><\/h3>\n<p><b><span data-contrast=\"auto\">How often should\u00a0cold water\u00a0storage tanks be cleaned?<\/span><\/b><span data-ccp-props=\"{}\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"auto\">Cold water\u00a0storage tanks should be cleaned and disinfected at least annually, or more\u00a0frequently\u00a0if risk assessments or\u00a0monitoring\u00a0results indicate increased risk.<\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/p>\n<p><b><span data-contrast=\"auto\">Why is chlorination of CWST important?<\/span><\/b><span data-ccp-props=\"{}\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"auto\">Chlorination removes bacteria, including Legionella, and disinfects internal surfaces to reduce the risk of contamination.<\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/p>\n<p><b><span data-contrast=\"auto\">What temperature should\u00a0cold water\u00a0be stored at?<\/span><\/b><span data-ccp-props=\"{}\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"auto\">Cold water\u00a0should be stored and distributed below 20\u00b0C. During summer months, temperatures can rise, requiring\u00a0additional\u00a0monitoring and control measures.<\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/p>\n<p><b><span data-contrast=\"auto\">Do CWSTs need to be sampled and tested?<\/span><\/b><span data-ccp-props=\"{}\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"auto\">Yes. Sampling of incoming mains and stored water helps verify water quality and confirms that control measures are effective.<\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/p>\n<p><b><span data-contrast=\"auto\">Is Legionella risk linked to dirty water tanks?<\/span><\/b><span data-ccp-props=\"{}\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"auto\">Yes. Sludge, sediment,\u00a0scale\u00a0and biofilm provide favourable conditions for Legionella growth if tanks are not properly\u00a0maintained.<\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/p>\n<\/div><\/div><\/div><\/div><\/div><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Cleaning, disinfection and sterilisation through chlorination or use of chlorine must be carried out annually on Cold water storage tanks (CWST).<\/p>\n","protected":false},"author":1,"featured_media":3518,"menu_order":1,"comment_status":"open","ping_status":"closed","template":"","format":"standard","meta":{"footnotes":""},"portfolio_category":[95],"portfolio_skills":[],"portfolio_tags":[110,167,166,117,118,171,143,112],"class_list":["post-170","avada_portfolio","type-avada_portfolio","status-publish","format-standard","has-post-thumbnail","hentry","portfolio_category-home-featured","portfolio_tags-chlorination","portfolio_tags-chlorination-maintenance","portfolio_tags-cold-water-storage-tank-cleaning","portfolio_tags-legionella-risk-assessment","portfolio_tags-legionnaires-disease","portfolio_tags-maintenance-service","portfolio_tags-pre-commissioning","portfolio_tags-water-treatment"],"_links":{"self":[{"href":"https:\/\/rjurmson.com\/nationalhygieneservices\/wp-json\/wp\/v2\/avada_portfolio\/170","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/rjurmson.com\/nationalhygieneservices\/wp-json\/wp\/v2\/avada_portfolio"}],"about":[{"href":"https:\/\/rjurmson.com\/nationalhygieneservices\/wp-json\/wp\/v2\/types\/avada_portfolio"}],"author":[{"embeddable":true,"href":"https:\/\/rjurmson.com\/nationalhygieneservices\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/rjurmson.com\/nationalhygieneservices\/wp-json\/wp\/v2\/comments?post=170"}],"version-history":[{"count":7,"href":"https:\/\/rjurmson.com\/nationalhygieneservices\/wp-json\/wp\/v2\/avada_portfolio\/170\/revisions"}],"predecessor-version":[{"id":4232,"href":"https:\/\/rjurmson.com\/nationalhygieneservices\/wp-json\/wp\/v2\/avada_portfolio\/170\/revisions\/4232"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/rjurmson.com\/nationalhygieneservices\/wp-json\/wp\/v2\/media\/3518"}],"wp:attachment":[{"href":"https:\/\/rjurmson.com\/nationalhygieneservices\/wp-json\/wp\/v2\/media?parent=170"}],"wp:term":[{"taxonomy":"portfolio_category","embeddable":true,"href":"https:\/\/rjurmson.com\/nationalhygieneservices\/wp-json\/wp\/v2\/portfolio_category?post=170"},{"taxonomy":"portfolio_skills","embeddable":true,"href":"https:\/\/rjurmson.com\/nationalhygieneservices\/wp-json\/wp\/v2\/portfolio_skills?post=170"},{"taxonomy":"portfolio_tags","embeddable":true,"href":"https:\/\/rjurmson.com\/nationalhygieneservices\/wp-json\/wp\/v2\/portfolio_tags?post=170"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}