Provision applicable to Germany:
For the protection of drinking water, a non-return valve must be installed between the faucet and the water inlet hose.
Attach the non-return valve to the faucet.
Screw the water inlet hose onto the thread of the non-return valve with the nut.
Keep a tight hold of the valve housing and only turn the nut. This will prevent damage to the inner hose.
The screw thread is subject to water connection pressure.
Check the connection for leaks. Slowly open the faucet. Correct the position of the seal and screw thread if necessary.
