Examples include: 1  Gliomas. 2  Meningiomas. 3  Acoustic neuromas (schwannomas). 4  Pituitary adenomas. 5  Medulloblastomas. 6  PNETs. 7  Germ cell tumors. 8  Craniopharyngiomas.
Depending on the internal quality of parts in water heater and whether you have followed maintenance schedule of draining and flushing the tank every year. You can expect a hot water heater to last between 8 to12 years. Water heater problems normally become self-evident: A hot water faucet fails to summon hot water, you see dripping or puddles near the water heater, or the tank emits strange gurgling or popping sounds.
I've heard the power vented water heater don't last as long. You'll notice at the 'Depot, they'll have a variety of regular water heaters rated for various life spans, and a single power vent model rated for 5-8 years. So you'll pay more initially, and have to replace it sooner.