Take siphon from installation kit. Fill siphon completely up with water and shake it several times, so that no bubbles develop and those already there can escape. Put siphon, with the breather hole towards the urinal's front side, into the hole in the urinal. Press the siphon slightly into the hole.
      Pour the amount of all-seal (1 bag, from installation kit) from the top into the small holes of the siphon. Test the siphon's functioning: Pour a glass of water from the top into the urinal. The water must run off without problem. From now on, do not give any more water into the basin - greater amounts of water may affect the siphon's functioning.
      Relax since your balance sheet, your guests and the environment benefit from Waterless.