TRV Numbers Explained
What 1–5 mean and best settings by room.
What 1–5 mean and best settings by room.
Manual, TRV and lockshield—how they work and how to choose.
Free a stuck pin safely and when to replace the valve.
Set‑and‑forget chart by room type.
Reliable models and finishes to match.
Read on for an in depth look
Straight, angled, corner, H‑block and more.
Pipe centres, threads and finish matching.
Get the finish & look you want
Even out heat with simple adjustments.
What they do and how to set them.
Diagnose TRV vs lockshield vs sludge.
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