Assumed something malfunctioned.

I waived the home warranty as negotiation tactic because since home inspector went thru house and did not find anything that would suggest there would be problems with covered items on the home warranty.Home warranty does not cover pre-existing conditions, but makes exception for real estate transaction, if1) malfunction was not know to seller's agent, buyer's agent and home inspector.2) malfunction cannot be detect thru visual inspection or simple mechanical test.so here is my malfunction that ended up costing me $1300.the shut-off valve to the kitchen faucet made a grinding noise and started leaking when i was turning off the supply to the kitchen faucet. this is day 1 in the house. i also had toilet tank spurt out water from the side, whenever i flush the toilet, indicated a seal issue--again day 1. not sure how the inspector wasn't able to catch this.because i live out of state and had to go back to work on day 3, i had somebody come out to replace a total of 7 shut-off valve to plumbing fixtures, 1 main line valve, and 1 water heater valve due to corrosions on the these valve parts for 1300would home warranty have covered these replacement or would they try to wiggle out of paying for them saying the corrosion was visually present, and when not present, the leakage would have been detected had somebody trying turning off and on the shutoff valves or flushed the toilet?

It's not unusual to see a few items in need of attention the first time a home is rented.The good thing is the tenants are letting you know when something malfunctions.  

Fukushima was not an operations malfunction, but rather a design issue paired with an Act of God.

I'm curious to know though the sump pump malfunctioned or just couldn't keep up.

regardless, it seems like the steam valve on the other side of the radiator is malfunctioning - its supposed to let cool air escape so steam can get into the radiator then shut off when it heats up from escaping steam.

Something like a dishwasher pump malfunction may only leak when it was run. 

(again, moral compass kind  of thing)  ...Somebody's "moral compass" has malfunctioned, and is keeping them off of the "right" course ...

If you need to replace the locks due to malfunction, wear, or for aesthetic reasons swap them out with the kind that you can re-key simply by placing any key in them.

For the fires, I don't know if there is anything I could have done differently as it wasn't the result of any electrical issues or building malfunctions.