I have half of my house currently unfinished, including the master bedroom and bath. Unfortunately tonight I went into my kitchen and noticed a puddle of water coming out of under the door to the master bedroom. Open the door and see from the master bedroom, along the wall, around the corner, all wet.
I look around and nothing is actively leaking, it doesn't smell, so it's not septic backup, but the area around the will-be-toilet is soaked. I wake up my brother and tell him to grab some towels and start drying things. I notice the shutoff valve for the toilet looks like it's turned about 1/8 turn open. I grab on to the valve, but as soon as I just barely touch it BAM! the valve busts off and water starts spraying up to the ceiling. I press my hand against the pipe and stop the flow, but my brother doesn't know where the shutoffs are. I switch places with him and run downstairs to the basement. Turns out this particular pipe is the very first branch from the tank/pump, and the valve to turn off just that branch is the one that broke. I have to turn off the water at the tank, and now am without water and a small mess in my unfinished master bathroom/bedroom.
I have no 1/2" cpvc caps in my house, a bunch of elbows, but no caps. Not even any T's to make a loop and use it as a cap. It's 1AM so nothing is open and I can't get supplies, it'll have to wait til the morning. I have to work, but luckily my dad is willing to come over in the morning and fix it.
I can't imagine the mess if I had not seen it and went to bed. That bathroom's been unfinished for years and never had any problems. I have no idea why that valve started leaking when it did. I ran out of dry towels, but luckily I had a huge tub of cat litter. I spread that around to absorb the water. Luckily the water didn't spread too far, there was a slight dip in the floor that it seemed to follow. It was right in line with the heating vent too, so I cranked up the heat a bit and it seemed to dry very fast. 30 minutes later much of the area was dry.