Pneumatic Smart Drain Valve Fitment with Double Sensor and Controller Battery

This bathroom fixture is a pneumatic smart drain valve fitment built as an automatic sensing toilet flush accessory with a controller and a battery box for toilet cistern use. As a flush valve, it works as a sensor drain valve module that supports automatic sensing drainage control, helping manage flushing operation through its connected control components. The unit features a white housing with a blue battery compartment, plus visible red and black leads and a small top connector for a practical assembled layout. Designed as a general-purpose size and style fitment, it is suitable for an overflow pipe diameter of 31.5 mm, making the sizing clear for matching installation points. This double smart drain-valve fitment is intended to provide a responsive toilet cistern solution that supports hands-off flushing and consistent drainage control.