The two Genius Valves Adaptors

Owned by Elena Crivoi (Unlicensed)
Last updated: Dec 16, 2024 by Matthew Hart

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.