Be very careful with teh outlet hose prior to the tee. There in no strain relief and the hose can easily kink or rupture at that point. may need to get a spring style strain relief. Better safe than sorry...be safe out there.
If you are working very hard, such as scraping serious barnacle growth, you'll find it cycles fairly often - perhaps every couple minutes, otherwise, much less.
Just Recently had a FATALITY in Chickasaw Al. Guy seen a UTUBE Video how Home made Dive Gear. Had a hose hooked to second stage. Piece of Chain for Weight belt. Small Air Compressor. He as I understand had NO DIVING EXPERIENCE. his girlfriend in the boat witness him in 40 ft water surfaced 2-3 times then surfaces Cry Help & Disapears. ! I didn't Dive Looking for him. But did see the Gear. DON'T TRY THIS IF YOU ARE NOT EXPERIENCED DIVER. & Know Equipment is SAFE...
1/Over dubbing2/kinked hoses don't give good air flow and don't last long 3/ Compressor is very noisey, other than that it was good fundamental crap, did this guy get paid?