• Complete Full Unit Assembly: This listing is for the complete assembly, including the high-torque ZA5 actuator head (27650) and the heavy-duty brass 2 port valve body, so you have every component required for a full replacement
• Flat Type Valve Design: Features an internal flat type valve rubber paddle mechanism. Please be aware that this is not a ball type valve and the actuator is designed for paddle-style stems. Verify your system requirements to avoid an incorrect purchase
• Standard UK 22mm Fitment: 22mm compression fittings on both ends for a professional, leak-resistant connection to standard UK copper pipe, making it the essential 22mm motorised valve for S-Plan systems
• Ease of Maintenance: Snap-on replacement actuator head and a manual lever for easy system filling and venting, allowing future head swaps without draining the primary circuit
• Precision Wiring and Operation: Operates on 230V AC with a low power consumption of 5 to 6 watts, with a 1-metre 5-core cable for industry-standard integration with your boiler and pump through a spring return motor
• Proven In UK Homes: Trusted by professional heating engineers across the UK, with a long track record of reliable service in domestic systems

The Drayton 27100 is a professional grade 2 port motorised valve engineered for regulating water circulation in British domestic heating circuits. It has earned its reputation through decades of reliable service in UK households, and is a common choice for heating engineers and homeowners wanting a fit and forget solution.

IMPORTANT: this is the full unit. To be absolutely clear and to prevent returns, this listing includes the complete assembly: both the ZA5 actuator head and the 22mm brass valve body. Many listings provide only the replacement head. This package provides everything required for a new S-Plan installation or a total valve failure replacement.

Compatibility warning: this unit uses an internal flat type valve rubber paddle to stop water flow. It is not a ball type valve. Before purchasing, please verify your existing valve body type. This actuator head is designed for paddle-style stems and will not function on ball-style mechanisms. Using the wrong head on a ball valve body can lead to system failure and leaks.

The 22mm compression ends give a professional, leak-resistant connection to standard UK 22mm copper or plastic pipe. The actuator features an integrated manual lever, which is essential for locking the valve open during filling, venting and commissioning. Its snap-on design means the actuator head can be removed or replaced in seconds without touching the wet side of the system, simplifying future maintenance.

Electrically, the unit is pre-wired with a 1-metre, 5-core cable following industry-standard wiring logic for integration into existing S-Plan controls. The high-torque motor operates on 230V AC and draws just 5 to 6 watts. Whether you are doing a new-build installation or an emergency repair, the Drayton 27100 offers the build quality and proven track record required for a warm, well-regulated home.