Drayton TRV4 Sensing Head (8502R)

£ 18.53INC VAT

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Drayton TRV4 Sensing Head (8502R)

White. Replacement sensing head for Drayton TRV4 wth fast-reacting liquid sensor. Includes range limiting pin.

  • Temperature Range: 10 to 30°C
  • Liquid Sensor
  • 1 Year Guarantee
  • Frost Protection
  • Suitable for All Domestic Systems
  • Fits all TRVs with M30 x 1.5mm Fitting
  • A-Rated for Energy Efficiency

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View all: Drayton Radiator Parts & Accessories

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What is the difference between 8250R and 7109R

You sell 2 indentical-looking Drayton TR4 Sensing heads - 8250R and 7109R. Can you tell me what the difference is please? If there is actually some difference, it would be nice if this difference showed up in the Specifications
Asked by: ChrisC1
I've just bought one of these and collected in store, where I asked about the difference. The advice was that it was simply the colour of the top part, white or chrome.
Answered by: Beth3
Date published: 2020-10-23

Will a Drayton TRV4 valve head work with other manufacturers valves?

Asked by: JimZt
This is a difficult one to answer. The Drayton TRV heads may well fit onto a competitors valve but the operation of the valve may be impeded.The correct operation of the valve depends upon the stroke length of the valve spindle.Obviously manufacturers manufacture the valve and head to compliment each other, the stroke length being a controlling factor. Fitting a Drayton head to a non Drayton valve may result in poor control as it may force a longer spindle to close the valve early resulting in under temperature or may allow a shorter spindle to remain open resulting in overheating. For best results a Drayton head should be used with a Drayton valve.
Answered by: Martin, Technical Support
Date published: 2019-10-16
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Brand Drayton
Colour White
Frost Protection Frost Protection
Manufacturer Guarantee 1 Year Guarantee
Pack Size 1
Parent Colour White
Pieces in Pack/Case 1
Product Type TRV4 Sensing Head
Sensor Type Liquid Sensor
Smart Compatibility Not Smart
Suitable System Suitable for All Domestic Systems
Temperature Range 10 to 30 °C
Thread Size M30 "