I dont know if it works, but you could use PUMP to take away pressure.

That or make a pressure vent somewere. I'd go for second one

forget the pump. what you can do is make some ttan seperated from the rest of the ttan by insl, then spark it to release the pressure. i suppose you could use the pressure sensor to do this.

Thats a good idea, in fact you could need some system to handle that pressure. No-One likes landscapes blowing up due to pressure vents