C20

I have a 2001 coast spa I have water coming up through air valve .this air valve operates jets at bottom of tub . I noticed loss of water so I stopped refilling water level dropped to 1” above Jets I was told to take shop vac & blow out I did no water so far didn’t run pump to long , but air valve has no suction. Valve does nothing

I have a 2001 coast spa I have water coming up through air valve .this air valve operates jets at bottom of tub . I noticed loss of water so I stopped refilling water level dropped to 1” above Jets I was told to take shop vac & blow out I did no water so far didn’t run pump to long , but air valve has no suction. Valve does nothing