McDonald Water Storage 170 Litre Heat Pump STEELFlow Cylinder with integrated 30L Buffer

The McDonald Water Storage 170 Litre Heat Pump STEELFlow Cylinder with integrated 30L Buffer is a pre-plumbed, unvented stainless steel cylinder designed for air source or ground source heat pumps, featuring an integrated 30L buffer tank for enhanced system performance and efficiency.

Product Description

The STEELflow Heat Pump Cylinder is manufactured from duplex stainless steel for superior corrosion resistance, specifically engineered for low-temperature heat pump applications. With a 170L main cylinder and integrated 30L buffer, it optimises flow rates and reduces cycling, improving overall system efficiency. Pre-plumbed with essential components like expansion vessel, pump, and valves, it ensures quick installation and compliance with UK building regulations. Ideal for residential new builds or retrofits, it supports sustainable heating with minimal maintenance.

Key Features

• Duplex stainless steel: High-grade material for durability and corrosion resistance.
• Integrated 30L buffer: Enhances heat pump performance by stabilising flow and reducing short cycling.
• Pre-plumbed design: Factory-fitted with pump, expansion vessel, and safety valves for rapid installation.
• Unvented mains pressure: Provides high-flow hot water for multiple outlets.
• Heat pump optimised: Low thermal mass for faster heat-up times.
• Compact slimline: Space-saving design for tight locations.
• WRAS approved: Certified for potable water systems.
• 10-year warranty: On cylinder body for long-term reliability.

Technical Specifications

• Model: CCS170/30HPTOTSLIM – STEELflow Heat Pump Cylinder with Buffer.
• Total capacity: 200 litres (170L cylinder + 30L buffer).
• Material: Duplex stainless steel.
• Maximum pressure: 3 bar (cylinder), 6 bar (buffer).
• Maximum temperature: 65 °C.
• Insulation: 50mm CFC-free foam.
• Connections: 22mm primary coil, 15mm secondary.
• Certifications: WRAS approved, UKCA marked.

Dimensions & Weights

• Diameter: 475 mm.
• Height: 1660 mm.
• Weight (empty): ~35 kg.
• Weight (full): ~205 kg.

System & Application Notes

• Ideal for air or ground source heat pumps in residential systems requiring buffer storage.
• Compatible with most heat pump brands; pre-plumbed for immediate use.
• Suitable for new builds and retrofits; optimises low-temperature systems.
• Installation by qualified plumbers following McDonald guidelines; G3 unvented certification required.
• Enhances efficiency with integrated buffer; 10-year cylinder warranty, 2-year on components.