{"product_id":"calmag-part-l-compliant-heating-pack-22mm-filter-inhibitor-cleanser-filling-loop-scale-inhibitor","title":"Calmag Part L Compliant Heating Pack | 22mm Filter, Inhibitor, Cleanser, Filling Loop \u0026 Scale Inhibitor","description":"\u003cstyle\u003e\n  .cm-desc * { box-sizing: border-box; }\n  .cm-desc { font-family: inherit; color: inherit; line-height: 1.7; font-size: 16px; }\n  .cm-desc p, .cm-desc li, .cm-desc td, .cm-desc th { font-size: 16px !important; line-height: 1.7; }\n  .cm-desc h2 { font-size: 22px !important; font-weight: 700; color: #1a3300; border-bottom: 2px solid #4a7c00; padding-bottom: 6px; margin: 2rem 0 1rem; }\n  .cm-desc h3 { font-size: 17px !important; font-weight: 700; color: #1a3300; margin: 1.2rem 0 0.4rem; }\n  .cm-desc p { margin: 0 0 1rem; }\n  .cm-desc ul { padding-left: 1.5rem; margin: 0 0 1rem; }\n  .cm-desc ul li { margin-bottom: 0.5rem; }\n  .cm-intro { background: #f2f7e8; border-left: 4px solid #4a7c00; padding: 1.1rem 1.4rem; border-radius: 0 6px 6px 0; margin-bottom: 1.5rem; }\n  .cm-intro p { margin: 0 !important; }\n  .cm-intro p + p { margin-top: 0.75rem !important; }\n  .cm-badge { display: inline-block; background: #4a7c00; color: #fff; font-size: 13px !important; font-weight: 700; border-radius: 4px; padding: 2px 10px; margin-right: 6px; margin-bottom: 4px; vertical-align: middle; }\n  .cm-badge.grey { background: #555; }\n  .cm-badge.orange { background: #b45000; }\n  .cm-badge.blue { background: #1a5080; }\n  .cm-dim-bar { background: #1a3300; color: #fff; border-radius: 8px; padding: 1rem 1.4rem; margin: 1.2rem 0; display: flex; flex-wrap: wrap; gap: 1.2rem; align-items: center; justify-content: space-around; }\n  .cm-dim { text-align: center; }\n  .cm-dim .val { font-size: 20px !important; font-weight: 800; color: #aee06a; line-height: 1; }\n  .cm-dim .unit { font-size: 11px !important; color: #c8f080; }\n  .cm-dim .lbl { font-size: 10px !important; color: #ccc; margin-top: 3px; }\n  .cm-contents-table { width: 100%; border-collapse: collapse; margin-bottom: 1.4rem; }\n  .cm-contents-table thead tr { background: #1a3300; }\n  .cm-contents-table th { padding: 0.7rem 1rem; text-align: left; font-weight: 700; font-size: 14px !important; color: #fff !important; }\n  .cm-contents-table td { padding: 0.7rem 1rem; border-bottom: 1px solid #e0e0e0; font-size: 16px !important; vertical-align: top; }\n  .cm-contents-table tr:nth-child(even) td { background: #f5faf0; }\n  .cm-contents-table td:first-child { font-weight: 700; color: #1a3300; width: 36%; }\n  .cm-spec-table { width: 100%; border-collapse: collapse; margin-bottom: 1.2rem; }\n  .cm-spec-table th { background: #4a7c00; color: #fff !important; text-align: left; padding: 0.7rem 1rem; font-weight: 600; font-size: 16px !important; }\n  .cm-spec-table td { padding: 0.6rem 1rem; border-bottom: 1px solid #e0e0e0; font-size: 16px !important; }\n  .cm-spec-table tr:nth-child(even) td { background: #f5faf0; }\n  .cm-spec-table td:first-child { font-weight: 600; color: #111; width: 42%; }\n  .cm-callout { background: #f2f7e8; border-left: 4px solid #4a7c00; border-radius: 0 6px 6px 0; padding: 1rem 1.3rem; margin: 1.2rem 0; }\n  .cm-callout p { margin: 0 !important; }\n  .cm-callout h3 { margin-top: 0 !important; }\n  .cm-faq-item { border-bottom: 1px solid #e0e0e0; padding: 1rem 0; }\n  .cm-faq-item:last-child { border-bottom: none; }\n  .cm-faq-item p { margin: 0.4rem 0 0 !important; }\n  .cm-infobox { background: #fff8e6; border: 1px solid #f0d080; border-radius: 6px; padding: 1rem 1.2rem; margin-top: 1.5rem; font-size: 16px !important; }\n  @media (max-width: 640px) { .cm-contents-table th, .cm-contents-table td { font-size: 14px !important; padding: 0.5rem 0.6rem; } }\n\u003c\/style\u003e\n\n\u003cdiv class=\"cm-desc\"\u003e\n  \u003cdiv class=\"cm-intro\"\u003e\n    \u003cp\u003e\n      \u003cspan class=\"cm-badge\"\u003ePart L Compliant\u003c\/span\u003e\n      \u003cspan class=\"cm-badge grey\"\u003eBuilding Regs\u003c\/span\u003e\n      \u003cspan class=\"cm-badge orange\"\u003eAll Hard Water Areas\u003c\/span\u003e\n      \u003cspan class=\"cm-badge blue\"\u003e5 Components\u003c\/span\u003e\n      \u003cspan class=\"cm-badge grey\"\u003eUK Manufactured\u003c\/span\u003e\n    \u003c\/p\u003e\n    \u003cp style=\"margin-top:0.75rem !important;\"\u003eThe \u003cstrong\u003eCalmag Part L Compliant Heating Pack\u003c\/strong\u003e is a complete five-component heating system commissioning pack designed to meet the requirements of Building Regulations Part L (conservation of fuel and power) for new boiler and heating system installations in England and Wales. Providing everything needed to protect a new or serviced central heating system in hard water areas, it combines physical filtration of magnetic and non-magnetic debris with chemical treatment (inhibitor and cleanser) and a WRAS-approved electrolytic scale inhibitor — all in a single, convenient pack.\u003c\/p\u003e\n    \u003cp\u003eSuitable for all hard water areas and all seasons. The pack conforms with current Building Regulations and Part L, and is a practical, cost-effective way for heating engineers to ensure both regulatory compliance and long-term system protection in a single order.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"cm-dim-bar\"\u003e\n    \u003cdiv class=\"cm-dim\"\u003e\n\u003cdiv class=\"val\"\u003e22mm\u003c\/div\u003e\n\u003cdiv class=\"unit\"\u003ecentral heating filter\u003c\/div\u003e\n\u003cdiv class=\"lbl\"\u003eMagnetic + Non-Magnetic\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"cm-dim\"\u003e\n\u003cdiv class=\"val\"\u003e500ml\u003c\/div\u003e\n\u003cdiv class=\"unit\"\u003econcentrate\u003c\/div\u003e\n\u003cdiv class=\"lbl\"\u003eBuildCert Inhibitor\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"cm-dim\"\u003e\n\u003cdiv class=\"val\"\u003e500ml\u003c\/div\u003e\n\u003cdiv class=\"unit\"\u003econcentrate\u003c\/div\u003e\n\u003cdiv class=\"lbl\"\u003eCleanser\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"cm-dim\"\u003e\n\u003cdiv class=\"val\"\u003eWRAS\u003c\/div\u003e\n\u003cdiv class=\"unit\"\u003eapproved\u003c\/div\u003e\n\u003cdiv class=\"lbl\"\u003eFilling Loop\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"cm-dim\"\u003e\n\u003cdiv class=\"val\"\u003eWRAS\u003c\/div\u003e\n\u003cdiv class=\"unit\"\u003eapproved\u003c\/div\u003e\n\u003cdiv class=\"lbl\"\u003eScale Inhibitor\u003c\/div\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003ch2\u003eWhat's In The Pack — 5 Components\u003c\/h2\u003e\n  \u003ctable class=\"cm-contents-table\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n\u003cth\u003eComponent\u003c\/th\u003e\n\u003cth\u003eSpecification \u0026amp; Purpose\u003c\/th\u003e\n\u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003e22mm Central Heating Filter\u003c\/td\u003e\n        \u003ctd\u003eRemoves both magnetite (iron oxide sludge) and non-metallic debris from the central heating circuit. 22mm inline installation. Captures ferrous and non-ferrous particulate contamination to protect the boiler heat exchanger, pump, and zone valves. Required for Part L compliance.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003e500ml Concentrated BuildCert Inhibitor\u003c\/td\u003e\n        \u003ctd\u003eNSF\/BuildCert certified corrosion inhibitor concentrate. Protects all metals within the heating system (ferrous and non-ferrous) against corrosion and further magnetite formation. Suitable for domestic properties up to 10 radiators or 100-litre system volume. Concentrated — dilute before use as directed.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003e500ml Concentrated System Cleanser\u003c\/td\u003e\n        \u003ctd\u003ePre-commission cleanser to flush loose deposits and flux residues from new systems, or to break down existing sludge in systems being serviced. Suitable for domestic properties up to 10 radiators or 100-litre system volume. Use before filling with inhibitor.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eWRAS Approved Filling Loop\u003c\/td\u003e\n        \u003ctd\u003eWRAS (Water Regulations Advisory Scheme) approved filling loop for compliant re-pressurisation of sealed central heating systems. Required for Part L compliance and boiler warranty conditions. Prevents backflow contamination of the mains supply.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003e15mm Electrolytic Scale Inhibitor (WRAS Approved)\u003c\/td\u003e\n        \u003ctd\u003eIndependently tested WRAS approved 15mm electrolytic scale conditioner. Fitted inline on the cold water supply to the boiler or cylinder. Independently tested to reduce limescale build-up by approximately 33% in hard water areas — saving energy and protecting heat exchanger surfaces. No salt, no power required.\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\n  \u003cdiv class=\"cm-callout\"\u003e\n    \u003ch3\u003e💡 Why is Part L Compliance Important?\u003c\/h3\u003e\n    \u003cp\u003eBuilding Regulations Part L (Conservation of Fuel and Power) requires that new heating system installations — particularly replacement boilers — meet minimum energy efficiency standards. Installing a system filter and dosing with inhibitor is now a requirement under Part L, and is also a condition of warranty for most boiler manufacturers. Using a compliant pack such as this Calmag Part L pack ensures the installation meets both regulatory requirements and manufacturer conditions of warranty, protecting the engineer from liability and the homeowner from invalid warranty claims.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n  \u003cdiv class=\"cm-faq-item\"\u003e\n    \u003ch3\u003eIs this pack sufficient for a large system?\u003c\/h3\u003e\n    \u003cp\u003eThe inhibitor and cleanser concentrates are each sized for a domestic system of up to 10 radiators or 100 litres of system water volume. For larger systems (more than 10 radiators or commercial installations), additional concentrates should be purchased to achieve the correct dosage rate. The filter and scale inhibitor are standard 22mm and 15mm fittings compatible with all standard domestic heating systems.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"cm-faq-item\"\u003e\n    \u003ch3\u003eDoes the filling loop need to be permanently installed?\u003c\/h3\u003e\n    \u003cp\u003eNo — the filling loop is a temporary connection used to pressurise the sealed heating system. It is connected to the cold mains, used to fill or re-pressurise the system, and then disconnected and removed after use to prevent any backflow risk. A permanent filling loop (if required) must incorporate a double check valve — the WRAS-approved loop in this pack is designed for temporary use during installation and servicing.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"cm-faq-item\"\u003e\n    \u003ch3\u003eWhere is the electrolytic scale inhibitor fitted?\u003c\/h3\u003e\n    \u003cp\u003eThe 15mm electrolytic scale inhibitor is fitted inline on the cold water inlet to the boiler or heating system — typically on the cold feed to the expansion vessel or on the mains supply branch feeding the filling loop connection. No power or chemicals are required — the device uses a sacrificial electrolytic element that reacts with calcium ions to inhibit their crystallisation into hard scale on heat exchanger surfaces.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"cm-infobox\"\u003e\n\u003cstrong\u003e⚠️ Note:\u003c\/strong\u003e Pack designed for systems up to 10 radiators \/ 100L. For larger systems, additional concentrate doses are required. WRAS-approved filling loop is for temporary use during fill\/re-pressurise — remove after use. Check local water hardness before specifying the correct chemical dose rates. For the chemical-only pack (no filter), see the alternative Calmag Part L pack listing.\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Calmag","offers":[{"title":"Default Title","offer_id":63553565229405,"sku":"CHEM-HTG-PK-C2","price":90.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/2051\/3629\/files\/CalmagPartLCompliantHeatingPack.webp?v=1771786095","url":"https:\/\/qualityheating.co.uk\/products\/calmag-part-l-compliant-heating-pack-22mm-filter-inhibitor-cleanser-filling-loop-scale-inhibitor","provider":"AIZO Quality Heating","version":"1.0","type":"link"}