1.  Eliminated toilet noises  
2. Pressure type design can endure positive shut-off with different water pressure anfd with the functon of sound off and anti-siphon
3.Suitable for different toilet tank (especially for short ones).  
4.Unique design, not sensitive to water quality (polluted water) 
5. Working water pressure: 3-150PSI or 0.2-10bar)..