Trident DRYSPELL PLUS 10 - Servicing the Non-Return Valve

8.5.1.4 Servicing the non-return valve
Figure 12. Exploded view of non-return valve
l Using a no. 38 spanner, remove the two M3 * 6.0 cheese head screws
l Clean the NRV plate
l Replace the rubber ball with a new one
l Clean the diffuser connector and re-install it
l Re-install the NRV plate and fasten the cheese head screws
INSTRUCTION MANUAL - Dryspell Plus
Reference : Manual Version
22