I might go with this setup with the valve/blowoff. I noticed that even if you drain the sanitizer cup there is still some on top of the plunger that goes into the fermenter along with whatever else. This way you can use the blowoff to dump the pressure instead
Mine does the same thing. I also have a fan circulating. I have different faucets though. I have 12’ per run. I feel like it’s a temperature thing though, maybe the faucet is just that much warmer. I feel it’s gotten worse with the rising temperature of my basement