OSO Upstream Kit 22/28 mm Fitting Kit For SuperStream Accumulators PRV Strainer Valves
OSO Upstream Kit 22/28 mm — Complete fitting kit for safe and compliant installation of SuperStream accumulators | Includes pressure reducing valve (PRV), strainer, double check valve, isolation valve, pressure gauges & 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)
Protects 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.
The 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 & 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.
Made 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.
Choose 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).
What Makes the OSO Upstream Kit Special?
- Complete & Regulation-Compliant — Contains every required upstream component for Water Regs approval in one convenient kit.
- 6 Bar PRV with Gauge — Limits inlet pressure to safe levels (adjustable down to 5 bar max) — protects accumulator & downstream plumbing.
- Double Check Valve — Prevents backflow/contamination — mandatory for non-return protection.
- Inline Strainer — Y-pattern filter catches debris before it reaches the accumulator — extends system life.
- Full-Bore Isolation Valve — Easy servicing/shutdown without draining the system.
- WRAS-Approved Brass — All components compliant for potable water use — reliable & long-lasting.
- Two Sizes Available — 22 mm or 28 mm to suit common UK mains pipe sizes — no adapters needed.
Key Features
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 11007380 |
| Pipe Sizes Available | 22 mm or 28 mm (choose at purchase) |
| PRV Setting | 6 bar (adjustable to max 5 bar) |
| Max Working Pressure | 10 bar |
| Materials | High-quality brass (WRAS-approved) |
| Included Components | PRV + gauge, strainer, double check valve, isolation valve, extra gauge, vessel connector, brass bush |
| Compliance | WRAS, Water Supply Regulations (UK) |
What's in the Box
✅ 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.
Frequently Asked Questions
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OSO Upstream Kit 22/28 mm Fitting Kit For SuperStream Accumulators PRV Strainer Valves
OSO Upstream Kit 22/28 mm — Complete fitting kit for safe and compliant installation of SuperStream accumulators | Includes pressure reducing valve (PRV), strainer, double check valve, isolation valve, pressure gauges & 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)
Protects 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.
The 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 & 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.
Made 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.
Choose 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).
What Makes the OSO Upstream Kit Special?
- Complete & Regulation-Compliant — Contains every required upstream component for Water Regs approval in one convenient kit.
- 6 Bar PRV with Gauge — Limits inlet pressure to safe levels (adjustable down to 5 bar max) — protects accumulator & downstream plumbing.
- Double Check Valve — Prevents backflow/contamination — mandatory for non-return protection.
- Inline Strainer — Y-pattern filter catches debris before it reaches the accumulator — extends system life.
- Full-Bore Isolation Valve — Easy servicing/shutdown without draining the system.
- WRAS-Approved Brass — All components compliant for potable water use — reliable & long-lasting.
- Two Sizes Available — 22 mm or 28 mm to suit common UK mains pipe sizes — no adapters needed.
Key Features
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 11007380 |
| Pipe Sizes Available | 22 mm or 28 mm (choose at purchase) |
| PRV Setting | 6 bar (adjustable to max 5 bar) |
| Max Working Pressure | 10 bar |
| Materials | High-quality brass (WRAS-approved) |
| Included Components | PRV + gauge, strainer, double check valve, isolation valve, extra gauge, vessel connector, brass bush |
| Compliance | WRAS, Water Supply Regulations (UK) |
What's in the Box
✅ 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.
Frequently Asked Questions
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
OSO Upstream Kit 22/28 mm — Complete fitting kit for safe and compliant installation of SuperStream accumulators | Includes pressure reducing valve (PRV), strainer, double check valve, isolation valve, pressure gauges & 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)
Protects 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.
The 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 & 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.
Made 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.
Choose 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).
What Makes the OSO Upstream Kit Special?
- Complete & Regulation-Compliant — Contains every required upstream component for Water Regs approval in one convenient kit.
- 6 Bar PRV with Gauge — Limits inlet pressure to safe levels (adjustable down to 5 bar max) — protects accumulator & downstream plumbing.
- Double Check Valve — Prevents backflow/contamination — mandatory for non-return protection.
- Inline Strainer — Y-pattern filter catches debris before it reaches the accumulator — extends system life.
- Full-Bore Isolation Valve — Easy servicing/shutdown without draining the system.
- WRAS-Approved Brass — All components compliant for potable water use — reliable & long-lasting.
- Two Sizes Available — 22 mm or 28 mm to suit common UK mains pipe sizes — no adapters needed.
Key Features
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 11007380 |
| Pipe Sizes Available | 22 mm or 28 mm (choose at purchase) |
| PRV Setting | 6 bar (adjustable to max 5 bar) |
| Max Working Pressure | 10 bar |
| Materials | High-quality brass (WRAS-approved) |
| Included Components | PRV + gauge, strainer, double check valve, isolation valve, extra gauge, vessel connector, brass bush |
| Compliance | WRAS, Water Supply Regulations (UK) |
What's in the Box
✅ 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.
