Rinnai BC-100V-1S Bath Controller, Silver Tankless water heater accessory Adjust bath fill settings Compatible with Rinnai Models: RL75EN,RL75EP,RL75IN,RL75IP,RL94EN,RL94EP,RL94IN,RL94IP,RU80EN,RU80EP,RU80IN Compatible with Rinnai Models: RU80IP,RU98EN,RU98EP,RU98IN,RU98IP,V53EN,V53EP,V65EN,V65EP,V65IN,V65IP,V75EN,V75EP,V75IN,V75IP