Product Description

Grundfos Amazon Universal 3 Bar Twin Negative Head Shower Pump

Model: 96788173 / STN-3.0 B

The Grundfos Amazon STN-3.0 B Universal 3 Bar Twin Negative Head Shower Pump is a premium automatic twin impeller shower booster pump designed specifically for negative head plumbing systems where the cold water storage tank is positioned below the shower outlet. In these installations, a specialist negative head pump is required to detect water demand automatically and deliver consistent water pressure, even when natural gravity flow is unavailable.

Part of the renowned Grundfos Amazon range, the STN-3.0 B is widely recognised as the “Rolls Royce” of shower pumps. Manufactured with heavy-duty brass impellers and precision-machined brass components, it delivers outstanding reliability, exceptionally quiet operation and long service life.

Designed to simultaneously boost both the hot and cold water supplies, the STN-3.0 B provides a powerful 3.0 bar pressure increase, making it ideal for high-performance showers and demanding domestic plumbing systems. Complete with intelligent automatic controls, anti-vibration feet and flexible hoses, it offers premium performance with straightforward installation.

Grundfos Amazon STN-3.0 B Features

• Universal Twin Negative Head Shower Pump
• Model: STN-3.0 B
• Part Number: 96788173
• 3.0 Bar Pressure Rating
• Suitable for Negative Head Systems
• Twin Impeller Design
• Boosts Both Hot & Cold Water Supplies
• Heavy Duty Brass Impellers
• Precision Machined Brass Internal Components
• 230 Volt Power Supply
• 22mm Connections
• Centrifugal Pump Design
• Built-in Automatic Flow Switch
• Built-in Automatic Pressure Switch
• Anti-Vibration Feet
• Supplied with Flexible Hoses
• WRAS Approved
• CE Compliant
• 5 Year Manufacturer Warranty
• Grundfos Amazon Installation Guide
• Grundfos Amazon Pump Brochure

Key Features & Benefits

• Automatic Negative Head Operation – Specifically designed for systems where the cold water storage tank is below the shower outlet.
• Powerful 3 Bar Performance – Delivers exceptional water pressure for luxury showers and demanding domestic installations.
• Twin Impeller Design – Simultaneously boosts both hot and cold water supplies for balanced water pressure.
• Heavy Duty Brass Construction – Premium brass impellers and precision-machined components provide outstanding durability.
• Automatic Flow Detection – Built-in flow switch automatically starts the pump whenever water demand is detected.
• Automatic Pressure Control – Pressure switch maintains system pressure and automatically stops the pump after use.
• Quiet Smooth Operation – Anti-vibration feet reduce vibration and operating noise.
• 5 Year Manufacturer Warranty – Long-term warranty provides complete peace of mind.

Technical Specification

• Model: STN-3.0 B
• Part Number: 96788173
• Brand: Grundfos
• Product Type: Universal Twin Shower Pump
• System Type: Negative Head
• Pressure Rating: 3.0 Bar
• Power Supply: 230 Volt
• Connections: 22mm
• Pump Type: Centrifugal
• Approvals: WRAS Approved & CE Compliant
• Warranty: 5 Years

What’s Included?

• 1 × Grundfos Amazon STN-3.0 B Universal Twin Shower Pump
• 4 × Manufacturer Supplied Flexible Hoses
• Built-in Anti-Vibration Feet
• Installation Instructions

Ideal For

• Negative head plumbing systems
• Gravity-fed shower systems
• Boosting both hot and cold water supplies
• Luxury shower installations
• High-performance domestic bathrooms
• Replacement shower pumps
• Professional plumbing installations
• Homes where the cold water tank is below the shower outlet

Why Choose the Grundfos Amazon STN-3.0 B?

The Grundfos Amazon STN-3.0 B is specifically designed for demanding negative head plumbing systems where conventional positive head pumps cannot operate correctly. Its intelligent automatic controls detect water demand without relying on gravity flow, ensuring reliable water pressure whenever you need it.

With premium brass construction, twin impeller technology and a comprehensive 5-year manufacturer warranty, the STN-3.0 B delivers exceptional shower performance together with the renowned quality and reliability that make Grundfos one of the world’s leading pump manufacturers.

Why Buy from SNH Tradecentre?

• Competitive prices on Grundfos shower pumps
• Large stock availability
• Nationwide delivery available
• Expert plumbing and heating advice
• Trade and public customers welcome
• Trusted UK plumbing supplier
• Collection available from our Kent trade counter