Wills these heads replace the Pegler Terrier Heads

Most modern TRV heads are M30 x 1.5mm so there should be a very high probability. I suggest you measure the thread of your heads with a Vernier gauge checking both diameter and pitch.

What does each setting 1-5 correlate to in room temperature setting

The numbers on a thermostatic radiator valve refer to the temperature in the room, not the radiator. This is a common misconception, so don't worry if you weren't aware of this before.The very point of a thermostatic radiator valve is that it can detect the temperature in the room and will let more or less hot water into the radiator accordingly. If the room is cold, the the TRV will allow more hot water into the room to heat it up. As the room gets warmer, the TRV will restrict the amount of hot water coming into the radiator to maintain the temperature. If the room temperature starts to drop, the TRV will allow more hot water in...and so on. The numbers on the valve roughly correlate to the room temperatures below. When the room drops below these temperatures, the TRV will allow hot water to flow into the radiator: 0 = Off * = 7°C 1 = 10°C 2 = 15°C 3 = 20°C 4 = 25°C 5 = 30°C This can only be a guide and not construed as factual.

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Trv Thermostatic Radiator Valve, Thermostatic Valves Head Only, Radiator Thermostat Head M30 x 1.5, Standard Radiator Valves Replacement Head for Home Office, White, 3PCS

Trv Thermostatic Radiator Valve, Thermostatic Valves Head Only, Radiator Thermostat Head M30 x 1.5, Standard Radiator Valves Replacement Head for Home Office, White, 3PCS

Product ID: 382114422

⚙️M30 x 1.5 threaded fit

❄️Built-in antifreeze protection

🌡️5-level precise temp control

20839CFA

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Description

🌡️ Upgrade your comfort game with smart, sleek radiator control!

SMART TEMPERATURE SENSING - Automatically adapts to room and heating changes, ensuring consistent comfort without manual tweaks.
FREEZE PROOF PEACE OF MIND - Integrated antifreeze protection safeguards your system during cold snaps, keeping your space worry-free.
DURABLE HIGH QUALITY BUILD - Crafted from premium alloy and plastic for long-lasting reliability and smooth adjustment.
PRECISION FIT FOR SEAMLESS UPGRADE - Fits standard M30 x 1.5 radiator threads for effortless replacement and instant performance boost.
CUSTOM CLIMATE CONTROL AT YOUR FINGERTIPS - 5-level modulation lets you dial in the perfect temperature, from zero to cozy warmth.

The Trv Thermostatic Radiator Valve Head is a durable, easy-to-install replacement designed for M30 x 1.5 threaded radiators. Featuring 5 adjustable temperature levels and built-in antifreeze protection, it intelligently senses ambient changes to maintain optimal room warmth. Crafted from high-quality alloy and plastic, this valve head ensures long-lasting performance and precise climate control for home or office environments.

Specifications

Asin	B09JFNLC3S
Batteries Included	No
Batteries Required	No
Best Sellers Rank	141,480 in DIY & Tools (See Top 100 in DIY & Tools) 1,077 in Central Heating System Accessories
Customer Reviews	4.1 4.1 out of 5 stars (126) 4.1 out of 5 stars
Date First Available	14 Oct. 2021
Guaranteed Software Updates Until	unknown
Item Model Number	Radiator Valve-1
Item Package Quantity	1
Item Weight	340 g
Manufacturer	Swetup
Part Number	Radiator Valve-1
Product Dimensions	20 x 8 x 8 cm; 340 g

Reviews

User

Radiator Valves

Great productGood value for moneyArrived promptly

26.03.2026

User

Great quality 👌

Very good would recommend 👌

16.12.2025

User

cheap and works

Works both as a thermostat and as a valve. Made cheaply and flimsy, but literally 3 times less expensive than A-brand you expect to find in your home. 3 stars, + one star for price. Do not recommend as a long-term solution for a personal house, but OK for a temporary (reneted) property

29.01.2025

User

Easy to install

Good value for money

29.01.2026

User

Disinterested after a short time

Very brittle

29.04.2025

User

Not a 'Universal fit for all radiators

These radiator valves did not fit my radiatiors so are not what I'd call a 'universal fit'. All my rads are 20 years old if that helps. I was hoping to buy more but sadley have had to return them.

25.11.2025

User

Nice quality

Nice quality of radiator thermostatic valvesLook good and working well

14.04.2025

User

Easy fit to standard radiator

Fitted rads witout any fuss

7.12.2025

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20839CFA

Duties & taxes included

In stock

Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Senegal.

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