Kit O-Ring Valvola Soccorso Aria per Pentair 98209800 per Filtro Piscina/Spa Pac Fab Nuovo
(Compatible with Pentair 98209800, 98209803, 98209804). Bad o-rings can also allow air to enter your system. (An Air Relief Valve has 5 parts. and 3 of them are o-rings ! ). Air Valve and Pressure Gauge areNOT included.