Product Description

Grundfos Amazon 4 Bar Twin Shower Pump Positive

Model: 96787471 / STP-4.0 B

The Grundfos Amazon STP-4.0 B 4 Bar Twin Shower Pump is the highest performance model in the premium Amazon range, engineered to provide exceptional water pressure, superior durability and long-lasting reliability. Widely regarded as the “Rolls Royce” of Grundfos shower pumps, the Amazon range is manufactured using heavy-duty brass impellers and precision-machined brass components to deliver outstanding performance in demanding domestic plumbing systems.

Designed to simultaneously boost both hot and cold water supplies, the STP-4.0 B delivers a powerful 4.0 bar pressure increase, making it ideal for luxury bathrooms, multi-outlet shower systems and properties where maximum water pressure is required from a gravity-fed positive head system.

Featuring intelligent automatic flow and pressure switches, anti-vibration feet and premium centrifugal pump technology, the Grundfos Amazon STP-4.0 B provides quiet, dependable operation and is supplied complete with flexible hoses for straightforward installation.

Grundfos Amazon STP-4.0 B Features

• Twin Impeller Positive Head Shower Pump
• Model: STP-4.0 B
• Part Number: 96787471
• 4.0 Bar Pressure Rating
• 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

• Powerful 4 Bar Performance – Delivers exceptional water pressure for high-performance showers and luxury bathroom installations.
• Twin Impeller Design – Simultaneously boosts both hot and cold water supplies to provide balanced flow and maximum performance.
• Heavy Duty Brass Construction – Premium brass impellers and machined brass components ensure exceptional durability and longevity.
• Automatic Flow Activation – Built-in flow switch starts the pump automatically whenever water demand is detected.
• Automatic Pressure Control – Pressure switch automatically stops the pump and maintains system pressure after use.
• Quiet Smooth Operation – Anti-vibration feet minimise vibration and operational noise.
• Centrifugal Pump Technology – Designed for reliable, efficient long-term performance.
• 5 Year Manufacturer Warranty – Comprehensive warranty provides complete peace of mind.

Technical Specification

• Model: STP-4.0 B
• Part Number: 96787471
• Brand: Grundfos
• Product Type: Twin Shower Pump
• System Type: Positive Head
• Pressure Rating: 4.0 Bar
• Power Supply: 230 Volt
• Connections: 22mm
• Pump Type: Centrifugal
• Approvals: WRAS Approved & CE Compliant
• Warranty: 5 Years

What’s Included?

• 1 × Grundfos Amazon STP-4.0 B Twin Shower Pump
• 4 × Manufacturer Supplied Flexible Hoses
• Built-in Anti-Vibration Feet
• Installation Instructions

Ideal For

• Positive head plumbing systems
• Gravity-fed hot and cold water systems
• Luxury shower installations
• High-performance bathrooms
• Boosting both hot and cold water supplies
• Multi-outlet shower systems
• Improving low water pressure
• Professional plumbing installations

Why Choose the Grundfos Amazon STP-4.0 B?

The Grundfos Amazon STP-4.0 B represents the pinnacle of the Amazon shower pump range, delivering outstanding water pressure together with premium engineering and exceptional durability. Its heavy-duty brass construction, twin impeller design and intelligent automatic controls ensure smooth, reliable operation even in demanding domestic applications.

With WRAS approval, a comprehensive 5-year warranty and Grundfos’ renowned build quality, the STP-4.0 B is an excellent choice for homeowners seeking the highest levels of shower performance and long-term reliability.

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