The Evolve 15mm Angled TRV (Thermostatic Radiator Valve) automatically regulates the flow of hot water into a radiator to hold a room at a chosen temperature, cutting unnecessary heating and reducing boiler running time. The angled 15mm body is designed for pipework that runs horizontally into the radiator, keeping pipes close to the wall and out of the way.
Part of the Evolve Contract range from BiWorld, this valve pairs a self-contained liquid expansion sensor head with a bi-directional valve body suitable for flow or return installation. A chrome/white finish keeps it discreet against most radiators and pipework, and it is built for everyday reliability in domestic central heating systems.
15mm
Pipe Size
Angled
Valve Style
0-28°C
Temp Range
10 bar
Max Pressure
150 kg/h
Normal Flow
1 Year
Warranty
Good to Know
This valve is bi-directional, so it can be fitted on the flow or return side of the radiator, though reverse-flow use should stay within the manufacturer's stated pressure limits. A frost protection setting at approximately 7°C is built into the low end of the temperature scale.
Angled 15mm Body
Suits pipework that runs horizontally into the radiator, keeping the finished installation neat and close to the wall.
Thermostatic Control
Self-contained liquid expansion sensor head automatically adjusts flow as room temperature changes, without any wiring or power source.
Bi-Directional Design
Valve body is rated for use on flow or return pipework, giving installers flexibility on system layout.
Wide Temperature Range
Adjusts from 0°C to 28°C, including a frost protection setting at approximately 7°C to help protect the system in unoccupied rooms.
Chrome/White Finish
A clean, coordinated look that suits most radiators, valves and fittings found in UK domestic heating systems.
Standard UK Connection
15mm x 1/2" compression (1/2" BSP) connection fits directly onto standard UK central heating pipework.
Product Details
Product type
Thermostatic Radiator Valve (TRV)
Valve style
Angled
Finish
Chrome / White
Manufacturer
BiWorld (Evolve Contract)
MPN
EV-C15A
EAN
6938689700277
Connections & Sizing
Pipe size
15mm
Connection
15mm x 1/2" compression (1/2" BSP)
Performance
Temperature range
0°C - 28°C, with frost protection at approx. 7°C
Normal flow rate
150 kg/h
Maximum flow rate
470 kg/h
Maximum working pressure
10 bar
Maximum pressure differential
1 bar
Maximum water temperature
100°C
Maximum ambient temperature
50°C
Flow direction
Bi-directional, suitable for reverse flow within manufacturer limits
Warranty
Manufacturer warranty
1 year (subject to manufacturer's terms)
Is this valve suitable for flow and return pipework?
Yes. The valve body is bi-directional, so it can be fitted on either the flow or return side of the radiator, with reverse-flow use permitted within the stated pressure limits.
Does it need batteries or a power supply?
No. It uses a self-contained liquid expansion sensor in the valve head, which expands and contracts with room temperature to open and close the valve mechanically - no power source is required.
What's the difference between this and a manual valve?
A thermostatic radiator valve (TRV) like this one automatically adjusts flow to hold a target room temperature. A manual valve (like the Evolve Straight 15mm Radiator Valve) only opens and closes to a fixed position set by hand and doesn't respond to temperature changes on its own.
Can I use this with underfloor heating or a heat pump system?
This valve is designed for standard panel and column radiators on wet central heating systems. For underfloor heating manifolds or heat pump-specific zoning, a compatible actuator or manifold valve is usually required instead - check your system design before specifying.
Does this come with a lockshield valve?
No, this listing is for the angled TRV only. A separate lockshield valve is fitted to the opposite end of the radiator to balance the system and is sold separately.
BTU & WATT Calculator
Room Dimensions
Room Type
Living Room
Bedroom
Kitchen
Bathroom
Conservatory
Hallway
Glazing Type
Single Glazed
Double Glazed
Triple Glazed
External Walls
0 Wall
1 Wall
2 Walls
3 Walls
4 Walls
Insulation Level
Poor
Average
Good (New Build)
Required Heating
0
Watts
0
BTUs
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