Description
22mm Heat Pump Flow Balancing Valve with Fill & Flush – 4–40 L/min
The 22mm Heat Pump Flow Balancing Valve with Fill & Flush is designed to support accurate water flow balancing in heat pump and wet underfloor heating installations.
Maintaining the correct water flow is essential for efficient heat transfer and reliable heating system performance. This balancing valve allows installers to regulate the flow rate according to the requirements of the heating system.
The integrated fill and flush functionality also helps simplify system filling, flushing and commissioning.
Key Features & Benefits
- 4–40 L/min Flow Range – Supports flow adjustment to suit system requirements.
- 22mm Connection Size – Designed for compatible 22mm heating pipework.
- Integrated Fill & Flush Function – Helps simplify system filling, flushing and commissioning.
- Heat Pump Compatible – Suitable for appropriately designed heat pump heating circuits.
- Underfloor Heating Applications – Can be integrated into wet underfloor heating systems.
- Durable Construction – Designed for reliable performance in heating installations.
- Domestic & Commercial Use – Suitable for a variety of heating projects.
Technical Specifications
| Specification | Details |
|---|---|
| Brand | Bastion |
| Product Code | ZL-4901-22-00 |
| Product Type | Flow Balancing Valve with Fill & Flush |
| Connection Size | 22mm |
| Flow Range | 4–40 L/min |
| Maximum Static Pressure | 10 Bar |
| Maximum Operating Temperature | 110°C |
| Applications | Heat Pumps & Wet Underfloor Heating |
Applications
This valve is suitable for use in compatible heating systems where controlled water flow and convenient filling and flushing access are required.
Typical applications include:
- Air Source Heat Pump (ASHP) heating installations
- Water-based underfloor heating systems
- Low-temperature heating circuits
- Domestic and commercial heating installations
Why Choose a Flow Balancing Valve?
Correct flow balancing helps heating systems operate according to their design requirements. A properly adjusted flow rate supports efficient heat distribution and can help prevent performance issues caused by insufficient or excessive circulation.
The Bastion 22mm Flow Balancing Valve combines flow adjustment with filling and flushing functionality in one convenient component.
Important: Installation and flow settings should be carried out by a qualified heating professional in accordance with the heat pump manufacturer’s requirements.

