Ultraflow 28mm Blending Valve

Bigger Flow.
Faster Response.

For most underfloor heating systems, the 28mm blending valve is the preferred choice over a 22mm valve. Its superior capacity handles higher flow rates with significantly lower pressure drop — supporting larger multi-zone systems with smoother, more consistent temperature control.

Higher Flow Rate Lower Pressure Loss Smoother Control Multi-Zone Ready Code: UFMU

Higher Flow Rate

Smoother Control

Lower Pressure Loss

28mm vs 22mm

Why 28mm Is the
Right Choice.

A 28mm blending valve has a significantly larger bore than a 22mm valve, which reduces restriction in the circuit. For multi-zone systems or any installation with higher demand, this means full heat delivery to every loop without the pressure penalties of an undersized valve.

✓

Higher Flow Rate — Better Heat Output Handles larger systems and more zones without restriction, ensuring every circuit gets full heat delivery
✓

Smoother Temperature Control Greater bore size means finer, more consistent mixing — no temperature spikes or inconsistent comfort across zones
✓

Lower Pressure Loss — More Efficient System Significantly lower pressure drop than a 22mm valve at high flow rates — reduced pump energy and more reliable long-term performance

Code — UFMU

Ultraflow 28mm Blending Valve • Available now from Enfield & Rushden

Performance Data

Pressure Drop Comparison:
22mm vs 28mm Blending Valves

At 50 L/min the 28mm valve produces ~52% less pressure drop than a 22mm valve — meaning less pump work and more efficient heat delivery across every zone.

Flow Rate	22mm Valve (kPa)	28mm Valve (kPa)	Pressure Saving
20 L/min	~8	~3	~63% lower
30 L/min	~18	~7	~61% lower
40 L/min	~33	~14	~58% lower
50 L/min	~52	~25	~52% lower

* Data derived from Ultraflow pressure drop comparison chart. Values are approximate.

Side-by-Side Comparison

28mm vs 22mm Blending Valve

Feature	Ultraflow 28mm Valve (UFMU)	22mm Valve
Bore Size	28mm	22mm
Max Flow Rate	Higher	Restricted
Pressure Drop at High Flow	Significantly Lower	Higher
Temperature Control Consistency	Finer, More Consistent	Less Precise
Multi-Zone System Suitability	Ideal	Limited
Recommended For	Most UFH Installations	Small Single-Zone Systems

Why Installers Choose the 28mm

Engineered for Larger Systems

📅

More Zones

Higher flow capacity means you can serve more loops and larger floor areas from a single valve without restriction.

🌡

Even Temperatures

Finer mixing control across the larger bore eliminates temperature fluctuations between zones.

⚙

Pump Friendly

Lower pressure drop reduces the load on your circulation pump, extending service life and cutting running costs.

⚡

Fast Response

Higher flow rate means the blended water reaches setpoint temperature faster, so rooms heat up without delay.

28mm

Bore size

↓

Lower pressure drop vs 22mm

↑

Higher flow rate capacity

UFMU

Product code

Bigger Flow.Faster Response.

Why 28mm Is theRight Choice.

Pressure Drop Comparison:22mm vs 28mm Blending Valves