Review on ⚙️ Efficient Everflo EF5500-BOX 5.5GPM 12V Diaphragm Pump - 1/2 FNPT Connection, 5.5 GPM: Product Review and Features by Jeremy Gulledge

Bought these and tried my best to use them as a soft wash pump. I can only use long range attachments, no fan attachments. The flow at the first purchase was pulsating. It is suggested to turn the psi screw. This was adjusted and it worked fine for about 45 minutes and then nothing. I used a group 24 12 volt battery which sucked. I used a 16.7-12V waterproof charger, it was slightly better. The pump stopped working in the middle of my work and I noticed that the pump would not turn on. I checked the pressure switch, it's broken, also I noticed a crack in the plastic case, full of junk. The power switch should be pulled out when the pump lacks proper pressure, and then pressed to stop the pump when the pump is not in use or has sufficient pressure. The switch does not complete the circuit. After depressurizing, it takes 10 seconds to turn on, so also a broken switch. The screw can no longer be tightened without streaks at pump speed and dips into the housing. The entire power switch and the housing for switching the pump on and off look like complete plastic junk.