That's a new one on me. Not really sure what to advise, it's been a few years since we used Pressure Pro. I guess I would look inside the sensor where they connect and see if there is some sort of washer that's missing on the ones that leaked. Since they all didn't leak, something must be different with the three that did.
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Dick, Joyce, Diego, Picatso and Gustav
2017 3720 RL, and 2013 HC 343RL
Pullrite Hitch, IS, Disk Brakes, 3rd AC, Winegard Traveler, Bathroom door mod, Dometic 320, couch for desk swap, replaced chairs, sun screens, added awnings, etc.
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