{"product_id":"oso-upstream-kit-22-28-mm-fitting-kit-for-superstream-accumulators-prv-strainer-valves","title":"OSO Upstream Kit 22\/28 mm Fitting Kit For SuperStream Accumulators PRV Strainer Valves","description":"\u003cstyle\u003e\n  .dw-wrap{font-family:inherit;color:inherit;line-height:1.7;font-size:16px}\n  .dw-wrap p,.dw-wrap li,.dw-wrap td,.dw-wrap th{font-size:16px!important;line-height:1.7}\n  .dw-wrap h2{font-size:22px!important;font-weight:700;color:#1a3a5c;border-bottom:3px solid #008377;padding-bottom:6px;margin:2rem 0 1rem;line-height:1.3}\n  .dw-wrap h3{font-size:17px!important;font-weight:700;color:#1a3a5c;margin:1.2rem 0 0.4rem;line-height:1.4}\n  .dw-wrap p{margin:0 0 1rem}\n  .dw-wrap ul{padding-left:1.5rem;margin:0 0 1rem}\n  .dw-wrap ul li{margin-bottom:0.5rem}\n  .dw-badge{display:inline-block;font-size:13px!important;font-weight:700;border-radius:4px;padding:2px 10px;margin-right:5px;margin-bottom:4px;vertical-align:middle}\n  .dw-badge.blue{background:#008377;color:#fff}\n  .dw-badge.navy{background:#1a3a5c;color:#fff}\n  .dw-badge.teal{background:#0d9488;color:#fff}\n  .dw-badge.green{background:#1a7a3c;color:#fff}\n  .dw-badge.grey{background:#555;color:#fff}\n  .dw-intro-box{background:#e0f2fe;border-left:4px solid #008377CF;padding:1.1rem 1.4rem;border-radius:0 6px 6px 0;margin-bottom:1.5rem}\n  .dw-intro-box p{margin:0!important}\n  .dw-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:0.85rem;margin-bottom:1.2rem}\n  .dw-card{background:#e0f2fe;border:1px solid #90caf9;border-radius:6px;padding:1rem 1.1rem;line-height:1.6}\n  .dw-card strong{display:block;color:#1a3a5c;margin-bottom:0.35rem;font-size:16px!important}\n  .dw-info-box{background:#f0fdf4;border:1px solid #86efac;border-radius:6px;padding:1rem 1.2rem;margin:1.2rem 0}\n  .dw-info-box p{margin:0 0 0.5rem!important;color:#065f46;font-weight:700}\n  .dw-comp-box{background:#fff3cd;border:1px solid #ffc107;border-radius:5px;padding:0.9rem 1.1rem;margin:0.8rem 0}\n  .dw-spec-table{width:100%;border-collapse:collapse;margin-bottom:1.5rem}\n  .dw-spec-table th{background:#1a3a5c;color:#fff!important;text-align:left;padding:0.7rem 1rem;font-weight:700;font-size:16px!important}\n  .dw-spec-table td{padding:0.6rem 1rem;border-bottom:1px solid #bde0f5;vertical-align:top;font-size:16px!important}\n  .dw-spec-table tr:nth-child(even) td{background:#e0f2fe}\n  .dw-spec-table td:first-child{font-weight:600;color:#111;width:44%}\n  .dw-faq-item{border-bottom:1px solid #bde0f5;padding:0.9rem 0}\n  .dw-faq-item:last-child{border-bottom:none}\n  .dw-faq-item strong{color:#1a3a5c;font-size:16px!important;display:block;margin-bottom:0.3rem}\n  .dw-contents-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:0.6rem;margin-bottom:1.2rem}\n  .dw-contents-item{background:#f0f9ff;border:1px solid #bde0f5;border-radius:5px;padding:0.6rem 0.9rem;font-size:15px!important}\n\u003c\/style\u003e\n\n\u003cdiv class=\"dw-wrap\"\u003e\n\n  \u003cdiv style=\"margin-bottom:1rem\"\u003e\n    \u003cspan class=\"dw-badge blue\"\u003e11007380\u003c\/span\u003e\n    \u003cspan class=\"dw-badge navy\"\u003eUpstream Kit\u003c\/span\u003e\n    \u003cspan class=\"dw-badge teal\"\u003e22\/28 mm\u003c\/span\u003e\n    \u003cspan class=\"dw-badge green\"\u003eFitting Kit\u003c\/span\u003e\n    \u003cspan class=\"dw-badge grey\"\u003eFor SuperStream\u003c\/span\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"dw-intro-box\"\u003e\n    \u003cp\u003e\u003cstrong\u003eOSO Upstream Kit 22\/28 mm\u003c\/strong\u003e — Complete fitting kit for safe and compliant installation of SuperStream accumulators | Includes pressure reducing valve (PRV), strainer, double check valve, isolation valve, pressure gauges \u0026amp; vessel connector | Available in 22 mm or 28 mm sizes | WRAS-compliant brass components | Essential for every SuperStream system (one kit per system, add-on kits for extra accumulators)\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"dw-comp-box\"\u003e\n    \u003cstrong style=\"color:#856404\"\u003e✅ Mandatory for correct \u0026amp; regulation-compliant SuperStream installation\u003c\/strong\u003e\n    \u003cp style=\"margin:0.3rem 0 0;color:#5a3a00\"\u003eProtects the accumulator and downstream system with pressure control, backflow prevention and debris filtration. Choose size to match your incoming mains pipe (22 mm or 28 mm). One kit serves the entire system — use Add-on Kits (11007327) for additional accumulators.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cp\u003eThe OSO Upstream Kit 22\/28 mm is the official, purpose-designed connection and protection package required for every SuperStream accumulator installation. It ensures the system operates safely, efficiently and in full compliance with UK Water Regulations (Water Supply Regulations 1999 \u0026amp; subsequent amendments). The kit includes all critical upstream components: a 6 bar adjustable pressure reducing valve (PRV) with integral gauge, inline strainer to catch debris, double check valve to prevent backflow, full-bore isolation valve for servicing, additional pressure gauge, and brass vessel connector fittings.\u003c\/p\u003e\n\n  \u003cp\u003eMade from high-quality, WRAS-approved brass components, the kit is built to last and simplifies installation by providing everything needed in one box (no hunting for individual parts). It protects the accumulator from excessive pressure, reduces the risk of contamination or reverse flow, and allows easy monitoring\/adjustment of incoming pressure — critical for optimising accumulator performance and longevity.\u003c\/p\u003e\n\n  \u003cp\u003eChoose the correct size (22 mm or 28 mm) to match your property's incoming mains pipe diameter. This is a single-kit-per-system item — for systems with multiple accumulators, you only need one upstream kit plus the appropriate number of Add-on Kits (11007327 or 11007328 for Acc130-specific).\u003c\/p\u003e\n\n  \u003ch2\u003eWhat Makes the OSO Upstream Kit Special?\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eComplete \u0026amp; Regulation-Compliant\u003c\/strong\u003e — Contains every required upstream component for Water Regs approval in one convenient kit.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003e6 Bar PRV with Gauge\u003c\/strong\u003e — Limits inlet pressure to safe levels (adjustable down to 5 bar max) — protects accumulator \u0026amp; downstream plumbing.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDouble Check Valve\u003c\/strong\u003e — Prevents backflow\/contamination — mandatory for non-return protection.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eInline Strainer\u003c\/strong\u003e — Y-pattern filter catches debris before it reaches the accumulator — extends system life.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFull-Bore Isolation Valve\u003c\/strong\u003e — Easy servicing\/shutdown without draining the system.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eWRAS-Approved Brass\u003c\/strong\u003e — All components compliant for potable water use — reliable \u0026amp; long-lasting.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTwo Sizes Available\u003c\/strong\u003e — 22 mm or 28 mm to suit common UK mains pipe sizes — no adapters needed.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch2\u003eKey Features\u003c\/h2\u003e\n  \u003cdiv class=\"dw-grid\"\u003e\n    \u003cdiv class=\"dw-card\"\u003e\n\u003cstrong\u003ePressure Reducing Valve (PRV)\u003c\/strong\u003e6 bar preset (adjustable), with integral 0–10 bar gauge — safe \u0026amp; controllable inlet pressure.\u003c\/div\u003e\n    \u003cdiv class=\"dw-card\"\u003e\n\u003cstrong\u003eInline Strainer\u003c\/strong\u003eY-pattern filter protects accumulator from debris\/particles.\u003c\/div\u003e\n    \u003cdiv class=\"dw-card\"\u003e\n\u003cstrong\u003eDouble Check Valve\u003c\/strong\u003eNon-return protection — prevents backflow into mains supply.\u003c\/div\u003e\n    \u003cdiv class=\"dw-card\"\u003e\n\u003cstrong\u003eIsolation Ball Valve\u003c\/strong\u003eFull-bore lever handle — quick isolation for maintenance.\u003c\/div\u003e\n    \u003cdiv class=\"dw-card\"\u003e\n\u003cstrong\u003ePressure Gauge\u003c\/strong\u003eAdditional 0–10 bar gauge for upstream monitoring.\u003c\/div\u003e\n    \u003cdiv class=\"dw-card\"\u003e\n\u003cstrong\u003eVessel Connector\u003c\/strong\u003eBrass fitting for secure accumulator connection.\u003c\/div\u003e\n    \u003cdiv class=\"dw-card\"\u003e\n\u003cstrong\u003eWRAS Compliant\u003c\/strong\u003eAll parts approved for potable water systems.\u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n  \u003ctable class=\"dw-spec-table\"\u003e\n    \u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003e11007380\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePipe Sizes Available\u003c\/td\u003e\n\u003ctd\u003e22 mm or 28 mm (choose at purchase)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePRV Setting\u003c\/td\u003e\n\u003ctd\u003e6 bar (adjustable to max 5 bar)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMax Working Pressure\u003c\/td\u003e\n\u003ctd\u003e10 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMaterials\u003c\/td\u003e\n\u003ctd\u003eHigh-quality brass (WRAS-approved)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eIncluded Components\u003c\/td\u003e\n\u003ctd\u003ePRV + gauge, strainer, double check valve, isolation valve, extra gauge, vessel connector, brass bush\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCompliance\u003c\/td\u003e\n\u003ctd\u003eWRAS, Water Supply Regulations (UK)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/table\u003e\n\n  \u003ch2\u003eWhat's in the Box\u003c\/h2\u003e\n  \u003cdiv class=\"dw-contents-grid\"\u003e\n    \u003cdiv class=\"dw-contents-item\"\u003e✔ Inline Strainer (Y-pattern)\u003c\/div\u003e\n    \u003cdiv class=\"dw-contents-item\"\u003e✔ Pressure Reducing Valve 6 bar + integral gauge\u003c\/div\u003e\n    \u003cdiv class=\"dw-contents-item\"\u003e✔ Double Check Valve (non-return)\u003c\/div\u003e\n    \u003cdiv class=\"dw-contents-item\"\u003e✔ Full-bore Isolation Ball Valve\u003c\/div\u003e\n    \u003cdiv class=\"dw-contents-item\"\u003e✔ Additional 0–10 bar Pressure Gauge\u003c\/div\u003e\n    \u003cdiv class=\"dw-contents-item\"\u003e✔ Brass Vessel Connector \u0026amp; Bush (¼ × ½\" BSP)\u003c\/div\u003e\n    \u003cdiv class=\"dw-contents-item\"\u003e✔ Installation \u0026amp; commissioning guide\u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"dw-info-box\"\u003e\n    \u003cp\u003e✅ One kit required per SuperStream system (regardless of number of accumulators). For additional accumulators use Add-on Kit (11007327) or Acc130-specific Add-on (11007328). Installation must be by a qualified plumber in accordance with Water Regulations.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n  \u003cdiv class=\"dw-faq-item\"\u003e\n    \u003cstrong\u003eIs this kit mandatory for SuperStream installation?\u003c\/strong\u003e\n    Yes — it provides essential pressure control, backflow prevention, filtration and isolation required for compliance and safe operation.\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"dw-faq-item\"\u003e\n    \u003cstrong\u003eWhich size should I choose – 22 mm or 28 mm?\u003c\/strong\u003e\n    Match the kit to your incoming mains pipe diameter (most common UK sizes). If unsure, check your stopcock or incoming pipe.\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"dw-faq-item\"\u003e\n    \u003cstrong\u003eDo I need one kit per accumulator?\u003c\/strong\u003e\n    No — only one Upstream Kit per system. For extra accumulators use Add-on Kits (11007327 or 11007328 for Acc130).\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"dw-faq-item\"\u003e\n    \u003cstrong\u003eCan I adjust the PRV pressure?\u003c\/strong\u003e\n    Yes — factory set at 6 bar but adjustable down to a maximum of 5 bar to suit site conditions or accumulator pre-charge.\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"dw-faq-item\"\u003e\n    \u003cstrong\u003eAre all components WRAS-approved?\u003c\/strong\u003e\n    Yes — every part is compliant for use in potable water systems under UK regulations.\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"dw-faq-item\"\u003e\n    \u003cstrong\u003eDoes the kit work with the Charger Pump?\u003c\/strong\u003e\n    Yes — fully compatible. Install the Charger Pump before the Upstream Kit if incoming pressure is very low.\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"dw-faq-item\"\u003e\n    \u003cstrong\u003eWho should install this kit?\u003c\/strong\u003e\n    A qualified plumber in accordance with Water Supply Regulations (WRAS\/BS 6700). Incorrect installation may void warranty or breach regulations.\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"dw-faq-item\"\u003e\n    \u003cstrong\u003eWhat if my mains pipe is a different size?\u003c\/strong\u003e\n    The kit is specifically for 22 mm or 28 mm. For other sizes, consult a plumber for appropriate reducers\/adapters (not included).\n  \u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"OSO Hotwater","offers":[{"title":"22mm","offer_id":63734075982173,"sku":"Upstream-Kit-22","price":330.0,"currency_code":"GBP","in_stock":true},{"title":"28mm","offer_id":63734076014941,"sku":"Upstream-Kit-28mm","price":330.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/2051\/3629\/files\/OSOUpstreamKit22-28mmFittingKitForSuperStreamAccumulatorsPRVStrainerValves.png?v=1772782293","url":"https:\/\/qualityheating.co.uk\/products\/oso-upstream-kit-22-28-mm-fitting-kit-for-superstream-accumulators-prv-strainer-valves","provider":"AIZO Quality Heating","version":"1.0","type":"link"}