Where’s the job?

Scope of Works

• Isolate radiator and drain a small amount of water

• Remove TRV head and, if needed, valve body from the radiator outlet

• Fit new thermostatic radiator valve (matching angle or straight type) and any adaptors

• Pressure test the joint, check for leaks and set the TRV to confirm operation

• Repressurise and bleed the radiator if required

• Remove and dispose of old valve components and tidy the work area

Typical Cost

Time on Site

Most single TRV replacements take 1–2 hours on site; allow 2–4 hours if the radiator must be removed, the system drained or fittings are corroded

Questions to Ask Your Tradie

• Do you supply the TRV and, if so, what brand and warranty

• Are you a qualified heating engineer and insured for radiator work

• Will you need to drain the system or can the radiator be isolated in situ

• What warranty do you provide on parts and labour and is it written

• Could seized fittings or corroded pipework add time or cost and how would you proceed

• Will you test the valve and bleed the radiator before leaving

How to Avoid Surprises

• Clear space around the radiator and remove fragile items

• Make sure the heating is off and the system has cooled before the visit

• Send photos of the existing valve and pipe orientation so the tradie can quote accurately

• Arrange parking or access and inform of any flat‑manager or concierge rules

• Tell the tradie about pets, loft access or awkward pipework and agree a written quote before work starts