1、Quality material makes it firm and durable, which has long service life over 800000 times 2、Resistant to high pressure, low pressure inflow water, which has higher quality requirements 3、With water stop, anti-siphon function, good pollution resistance, adapt to different water quality 4、Stable drainage, the stability of the remaining water level of a single drainage valve remains within 3mm, batch stability ±2mm 5、Easy to install, which is convenient to use, save time and effort Features: 1. Quality material makes it firm and durable, which has long service life over 800000 times. 2. Resistant to high pressure, low pressure inflow water, which has higher quality requirements. 3. With water stop, anti-siphon function, good pollution resistance, adapt to different water quality. 4. Stable drainage, the stability of the remaining water level of a single drainage valve remains within 3mm, batch stability ±2mm. 5. Easy to install, which is convenient to use, save time and effort. Drain Valve Specification: Diameter: 2.5inch, Suitable ceramic diameter: 650-700mm Full drain, half drain is adjustable Drainage rate: > 2.4L/s Residual water level: the half-drain residual water level ≥100mm, the full-drain residual water level 40-65mm Inlet Valve Specification: Inlet water pressure range: 0.02- 2.1mpa Water supplement range: 0-33% Inlet flow rate: 0.29L/s Thread specification: g1/2" Package List: 1 * Drain Valve 1 * Inlet Valve 1 * Switch Button 1 * Rubber Ring 2 * Plastic Screw Note: 1. This product is suitable for 335mm-450mm split toilet, please confirm clearly before purchase. 2. Default shipped 5.8inch round double button. 3. Drain valve diameter 2.5 "( 63.5mm), inlet valve screw g1/2".