Review on 🔧 Enhance Performance: Merrill Pressure Air Pump with Adjustable Differential - Test, Measure & Inspect by Steve Campbell

I have used two Square D pressure switches in the last year, the last one I bought in May and it needs to be replaced. Their quality seems to be going downhill so I thought I'd try someone else. I bought this first Merrill last week and sent it back because the internal pins didn't match. Got a replacement today and same problem. The quality sucks. I don't know who to try next. Any suggestions?