{"product_id":"calmag-calsoft-midi-domestic-metered-water-softener-18l-1-11-people-unit-only","title":"Calmag CalSoft Midi Domestic Metered Water Softener | 18L | 1–11 People | Unit Only","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.blue { background: #1a5080; }\n  .cm-badge.orange { background: #b45000; }\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: 22px !important; font-weight: 800; color: #aee06a; line-height: 1; }\n  .cm-dim .unit { font-size: 12px !important; color: #c8f080; }\n  .cm-dim .lbl { font-size: 11px !important; color: #ccc; margin-top: 3px; }\n  .cm-feat-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 0.85rem; margin-bottom: 1.2rem; }\n  .cm-feat-card { background: #f6faf0; border: 1px solid #c5d8a0; border-radius: 6px; padding: 1rem 1.1rem; }\n  .cm-feat-card strong { display: block; color: #1a3300; margin-bottom: 0.35rem; font-size: 16px !important; }\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.warning { background: #fff8e6; border-left-color: #f0a800; }\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-feat-grid { grid-template-columns: 1fr; } }\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\"\u003e18 Litre Resin\u003c\/span\u003e\n      \u003cspan class=\"cm-badge grey\"\u003e1–11 People\u003c\/span\u003e\n      \u003cspan class=\"cm-badge blue\"\u003eMetered Control\u003c\/span\u003e\n      \u003cspan class=\"cm-badge grey\"\u003eUnit Only — Hoses Sold Separately\u003c\/span\u003e\n      \u003cspan class=\"cm-badge\"\u003eQuick-Connect Bypass Included\u003c\/span\u003e\n      \u003cspan class=\"cm-badge grey\"\u003eUK Manufactured\u003c\/span\u003e\n      \u003cspan class=\"cm-badge grey\"\u003e5 Year Parts Guarantee\u003c\/span\u003e\n    \u003c\/p\u003e\n    \u003cp style=\"margin-top:0.75rem !important;\"\u003eThe \u003cstrong\u003eCalmag CalSoft Midi\u003c\/strong\u003e is a medium-sized, fully automatic metered water softener suitable for households of 1–11 people — the largest capacity domestic softener in the Calmag CalSoft range. With an 18-litre resin vessel, the CalSoft Midi is designed to handle the water demands of larger households, hard water areas, and installations where long intervals between regenerations are desirable. Manufactured in the UK by Calmag, it features the same proven metered demand control system as the CalSoft Mini but in a physically larger cabinet at 900mm high × 330mm wide × 470mm deep.\u003c\/p\u003e\n    \u003cp\u003eThis listing is for the \u003cstrong\u003eunit only\u003c\/strong\u003e — the CalSoft Midi is supplied with the quick-connect bypass valve but without installation hoses. A compatible 15mm or 22mm installation kit must be purchased separately (see the Standard 15mm Install Kit or Hi-Flow 22mm\/19mm hose listings). This flexibility allows the softener to be ordered to suit the exact pipework configuration of each installation.\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\"\u003e18L\u003c\/div\u003e\n\u003cdiv class=\"unit\"\u003eresin\u003c\/div\u003e\n\u003cdiv class=\"lbl\"\u003eCapacity\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"cm-dim\"\u003e\n\u003cdiv class=\"val\"\u003e900\u003c\/div\u003e\n\u003cdiv class=\"unit\"\u003emm H\u003c\/div\u003e\n\u003cdiv class=\"lbl\"\u003eHeight\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"cm-dim\"\u003e\n\u003cdiv class=\"val\"\u003e330\u003c\/div\u003e\n\u003cdiv class=\"unit\"\u003emm W\u003c\/div\u003e\n\u003cdiv class=\"lbl\"\u003eWidth\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"cm-dim\"\u003e\n\u003cdiv class=\"val\"\u003e470\u003c\/div\u003e\n\u003cdiv class=\"unit\"\u003emm D\u003c\/div\u003e\n\u003cdiv class=\"lbl\"\u003eDepth\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"cm-dim\"\u003e\n\u003cdiv class=\"val\"\u003e1–11\u003c\/div\u003e\n\u003cdiv class=\"unit\"\u003epeople\u003c\/div\u003e\n\u003cdiv class=\"lbl\"\u003eHousehold Size\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"cm-dim\"\u003e\n\u003cdiv class=\"val\"\u003e70\u003c\/div\u003e\n\u003cdiv class=\"unit\"\u003el\/min\u003c\/div\u003e\n\u003cdiv class=\"lbl\"\u003eMax Flow (22mm)\u003c\/div\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"cm-callout warning\"\u003e\n    \u003cp\u003e⚠️ \u003cstrong\u003eUnit Only — No Hoses Included.\u003c\/strong\u003e The CalSoft Midi is supplied with the quick-connect bypass valve but does not include installation hoses. You must also order a compatible installation kit: the \u003cstrong\u003eStandard 15mm Install Kit\u003c\/strong\u003e (for gravity\/conventional systems) or \u003cstrong\u003e19mm\/22mm Hi-Flow Hoses\u003c\/strong\u003e (for combi, unvented, and Megaflow systems). See the related products in this catalogue.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003ch2\u003eKey Features\u003c\/h2\u003e\n  \u003cdiv class=\"cm-feat-grid\"\u003e\n    \u003cdiv class=\"cm-feat-card\"\u003e\n\u003cstrong\u003e📦 18L Resin — Maximum Domestic Capacity\u003c\/strong\u003eThe largest resin capacity in the Calmag CalSoft range at 18 litres — ideal for large households, multiple bathrooms, or hard water areas where a higher resin volume reduces regeneration frequency and ensures a continuous supply of soft water.\u003c\/div\u003e\n    \u003cdiv class=\"cm-feat-card\"\u003e\n\u003cstrong\u003e💧 Metered Demand Regeneration\u003c\/strong\u003eRegenerates only when required based on actual water consumption — not on a fixed time schedule. Automatically learns and adapts to the household's water usage patterns, using only the salt and water needed for each regeneration cycle.\u003c\/div\u003e\n    \u003cdiv class=\"cm-feat-card\"\u003e\n\u003cstrong\u003e🔗 Quick-Connect Bypass Included\u003c\/strong\u003eSupplied with Calmag's quick-connect bypass valve featuring quick-release fittings and ¾\" or 1\" BSP adaptors. The integrated water meter within the bypass body saves installation space and simplifies setup.\u003c\/div\u003e\n    \u003cdiv class=\"cm-feat-card\"\u003e\n\u003cstrong\u003e🇬🇧 UK Manufactured\u003c\/strong\u003eDesigned and manufactured in the UK by Calmag — a company built on consistent investment in stringent design, production and testing programmes, with a complete range of domestic and commercial water treatment solutions.\u003c\/div\u003e\n    \u003cdiv class=\"cm-feat-card\"\u003e\n\u003cstrong\u003e🔌 Simple Electronic Control\u003c\/strong\u003eEasy-to-understand electronics require minimal setup — adjust the water hardness level if required, and the unit handles regeneration automatically. Digital display provides clear operational status at all times.\u003c\/div\u003e\n    \u003cdiv class=\"cm-feat-card\"\u003e\n\u003cstrong\u003e🔒 5 Year Parts Guarantee\u003c\/strong\u003e5-year parts guarantee. Extended warranty options also available. All softeners are built and wet-tested before despatch to exacting manufacturing standards.\u003c\/div\u003e\n    \u003cdiv class=\"cm-feat-card\"\u003e\n\u003cstrong\u003e💰 Long-Term Running Economy\u003c\/strong\u003eWith an 18L resin capacity, the CalSoft Midi regenerates less frequently than smaller units — meaning lower total salt and water consumption per month for equivalent softening performance. Estimated £200\/year saving for an average household of four from reduced scale, cleaning products, and appliance maintenance.\u003c\/div\u003e\n    \u003cdiv class=\"cm-feat-card\"\u003e\n\u003cstrong\u003e🏠 Suitable for All Plumbing Systems\u003c\/strong\u003eSuitable for all plumbing configurations when paired with the appropriate installation kit — gravity-fed vented systems (15mm kit), combi boiler systems, unvented pressurised cylinders, and Megaflow systems (22mm\/19mm hi-flow hoses).\u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n  \u003ctable class=\"cm-spec-table\"\u003e\n    \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eCalSoft Midi Detail\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003eResin Capacity\u003c\/td\u003e\n\u003ctd\u003e18 litres\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eDimensions (H × W × D)\u003c\/td\u003e\n\u003ctd\u003e900mm × 330mm × 470mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eHousehold Size\u003c\/td\u003e\n\u003ctd\u003e1–11 people\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMax Flow Rate (15mm kit)\u003c\/td\u003e\n\u003ctd\u003e50 l\/min\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMax Flow Rate (22mm kit)\u003c\/td\u003e\n\u003ctd\u003e70 l\/min\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMax Pressure\u003c\/td\u003e\n\u003ctd\u003e5 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMin Inlet Pressure\u003c\/td\u003e\n\u003ctd\u003e1.5 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMax Water Temperature\u003c\/td\u003e\n\u003ctd\u003e43°C\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eInlet \/ Outlet Connection\u003c\/td\u003e\n\u003ctd\u003e¾\" BSP or 1\" BSP\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003ePreferred Salt Type\u003c\/td\u003e\n\u003ctd\u003eTablet\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eInstallation Kit\u003c\/td\u003e\n\u003ctd\u003eNot included — order separately (15mm or 22mm\/19mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eBypass Valve\u003c\/td\u003e\n\u003ctd\u003eQuick-connect bypass included (meter integrated)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eParts Guarantee\u003c\/td\u003e\n\u003ctd\u003e5 years\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eLabour Guarantee\u003c\/td\u003e\n\u003ctd\u003e12 months\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eElectrical Supply\u003c\/td\u003e\n\u003ctd\u003eStandard UK mains supply required\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eCalmag\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\n  \u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n  \u003cdiv class=\"cm-faq-item\"\u003e\n    \u003ch3\u003eWhat installation kit do I need for the CalSoft Midi?\u003c\/h3\u003e\n    \u003cp\u003eFor conventional gravity-fed or vented systems, order the Standard 15mm Install Kit (sold separately). For combi boiler, unvented, pressurised, or Megaflow systems, order the 19mm Hi-Flow Hoses (pair) or 22mm high-flow kit (sold separately). The bypass valve with integrated meter is included with the softener unit itself — only the hoses need to be purchased additionally.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"cm-faq-item\"\u003e\n    \u003ch3\u003eHow does the CalSoft Midi compare to the CalSoft Mini?\u003c\/h3\u003e\n    \u003cp\u003eThe CalSoft Midi has a larger 18L resin capacity (vs 12.5L for the Mini) and a larger physical footprint at 900mm high vs the Mini which fits under a kitchen sink. The Midi is therefore better suited to larger households (up to 11 people vs 8 for the Mini) and properties in hard water areas where a larger resin volume means fewer regenerations. The Mini is the more popular choice for typical domestic installations where under-sink fitting is important.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"cm-faq-item\"\u003e\n    \u003ch3\u003eCan the CalSoft Midi be installed in a garage?\u003c\/h3\u003e\n    \u003cp\u003eYes — provided the installation space is frost-free. The CalSoft Midi should not be installed in locations where it may be exposed to freezing temperatures, as this could damage the resin and valve assembly. A garage with adequate insulation or heating is acceptable.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"cm-infobox\"\u003e\n\u003cstrong\u003e⚠️ Note:\u003c\/strong\u003e Unit only — no installation hoses included. Order the Standard 15mm Install Kit or 19mm Hi-Flow Hoses (PAIR) separately to complete the installation. Quick-connect bypass valve with integrated meter is included. A separate unsoftened drinking water tap is required under Building Regulations. Requires standard UK mains power supply.\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Calmag","offers":[{"title":"Default Title","offer_id":63553048805725,"sku":"CALSOFT-MIDI","price":530.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/2051\/3629\/files\/Calsoft-Midi-WS-CALSOFT-MIDI.webp?v=1771783425","url":"https:\/\/qualityheating.co.uk\/products\/calmag-calsoft-midi-domestic-metered-water-softener-18l-1-11-people-unit-only","provider":"AIZO Quality Heating","version":"1.0","type":"link"}