The Genius Radiator Valves are shipped with 2 adapters to maximise compatibility with existing TRV bodies:
- The slim adapter fits TRV bodies which use the UK standard M30 x 1.5mm thread. This includes modern Drayton, Pegler and Honeywell TRVs.
- The larger adapter (fatter) fits the Danfoss RA fitting, which is the standard, domestic Danfoss fitting for the past 25 years.
Together these adapters cover over 80% of the TRVs currently in UK housing stock.
To see if a particular TRV is compatible, see our compatibility checker.