Key Features:

• Twin-impeller design — Boosts both hot and cold water supplies
• Positive-head operation — Designed for compatible gravity-fed water systems
• Continuously rated motor — Suitable for frequent and extended shower use
• Quiet performance — Engineered to minimise operating noise
• Automatic flow switch — Starts the pump when flow exceeds 0.8 litres per minute
• Dry-run protection — Helps protect internal components if the water supply is interrupted
• Brass construction — Provides strength and long-term durability
• High-performance seals — EPDM, PTFE and aluminium oxide materials help reduce the risk of leaks
• WRAS approved — Meets applicable UK water-fitting requirements
• Four flexible hoses included — Anti-vibration design helps reduce noise and strain on connections

What's Included:

• Stuart Turner 4.5 Bar Twin Impeller Positive Head Monsoon Shower Pump - 46418

This Stuart Turner twin-impeller positive-head shower pump provides a practical solution for improving weak hot and cold water pressure. Designed for compatible gravity-fed systems, it delivers balanced performance to a shower, bath, shower mixer or mixer tap.

Boosts hot and cold water pressure

The twin-impeller design boosts both water supplies at the same time, helping maintain balanced pressure and temperature at the connected outlet. This can transform a weak-flowing shower into a stronger and more satisfying experience.

Designed for positive-head systems

This pump uses the natural flow from a gravity-fed system to activate. It typically requires at least one metre of vertical distance between the pump and the base of the cold-water cistern to provide the necessary positive head.

Please consult a qualified plumber or installer before purchasing to confirm that a positive-head pump is suitable for your water system.

Continuously rated motor

The continuously rated motor is designed to operate for extended periods without regular cooling breaks. This makes the pump well suited to busy households where several people may use the shower in close succession.

Quiet operation

Stuart Turner pumps are engineered to provide effective pressure boosting with minimal operating noise. Comparative laboratory testing has shown the company’s regenerative pumps to be among the quietest options available in the UK.

Automatic start and dry-run protection

A sensitive flow switch automatically starts the pump when the water flow exceeds 0.8 litres per minute. Dry-run protection also helps safeguard the bearings and other internal parts if the water supply becomes restricted or interrupted.

Durable brass construction

The robust brass body is designed to withstand regular use and humid installation environments. EPDM, PTFE and aluminium oxide seals provide dependable sealing, while PTFE helps reduce the risk of sticking after extended periods without use.

WRAS approved

WRAS approval provides reassurance that the pump complies with relevant UK water-fitting requirements. Every unit is also individually tested before leaving the factory to support reliable performance.

Four anti-vibration hoses included

Four flexible hoses are supplied for connecting the pump to the incoming and outgoing pipework. Their anti-vibration design helps isolate movement from the pump, reducing transmitted noise and strain on the connections.

British engineering heritage

Stuart Turner has been developing pumping technology since 1906 and continues to operate from its historic site in Henley-on-Thames. Decades of experience and ongoing investment in product development have made the company one of the UK’s best-known shower-pump manufacturers.