BESGO automatic backwash valve made of PVC-U with hydraulic control
for water or air. DN 40 - 125 with adhesive nipple (can be glued outside),
internal parts made of stainless steel V4A (1.4571), gasket made of Viton / PTFE - ozone resistant,
incl. solenoid valve with emergency manual override. Backwash valve incl. 3/2
230 volt solenoid valve - assembled, pressure loss: per 20 m3/h = 3 mWC
pressure loss.