Product review (5 stars): This Is One of Those Items I Hate to Spend Money On
I learned the hard way and didn't replace my original filter in the six month period recommended. It cracked, and I had a flood in the middle of the night that ruined my hard wood floors. I decided that I'd never be late, again. As soon as I replace one, I order another so I always have one on hand. Easy to put in and gives me peace of mind.

I wish Amazon would sell this on a prescription basis as it has to be replaced every six months.