Myson TRVs have used M30 threads for a long time, though in the distant past they had M28 threads (pre 1997). The Hive app uses helpful images to guide you step-by-step through removing your old controls, selecting the correct adaptor for your radiator and getting your Hive Radiator Valve correctly installed. The installation process should take around 10-20 minutes.

Wiser Radiator Valve Adapter Guide | Wiser

Our Hive Radiator Valves let you manage your heating room by room, all from your smartphone. So you never have to heat rooms you aren’t using. When Heat On Demand turns the heating on, every radiator will be provided with heat. Rooms with thermostatic valves (including Hive Radiator Valves) will warm up until they reach their target temperatures. Rooms with manual (on/off) radiator controls will continue to heat up until the boiler switches off again.The male thread on the top of the adapter is M30 (30mm) and the female thread on the bottom is M28 (28mm).

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Hive Heating Plus helps you control how much you spend on your heating. It also keeps an eye on how you are heating your home and provides personal suggestions to improve efficiency. Set your savings target The inexpensive HS-TRVD-AD securely fits the TRV-3 whilst the broad high tensile, durable, stainless steel, pin provides a perfect mechanical transmission of the automation force through to the TRV body pin. Specifications of the TRV Adaptor To make one room warm while keeping all other rooms cooler, you need to have Hive Radiator Valves installed on all your main radiators. You can then set one radiator to warm up while setting all the other radiators to lower temperatures. PF Community Forums General Off-Topic Chat For Sale & Wanted Make a suggestion about the forum in general Your Hive Radiator Valves come with the two most common valve body adaptors and other adaptors are available free of charge from Hive.I had bought some Hive Radiator Valves (maybe a mistake...), but in principle the idea is excellent - control temperature of individual rooms for specific times without having to keep adjusting the valves - great when working from home.