When attempting to close a valve to change the property-wide water filter, the valve closed but the plastic handle broke off. I tried to open it again with a wrench but the bit of plastic it was mounted to broke off too.
I'd cut the pipes and replace it myself, but I don't know how to relieve the water pressure without this valve. As far as I can tell, it's the only way.
We currently have no water because of this mistake :(
How do I open the valve, or is there any other way to relieve the pressure (preferably without flooding the pump-house)?