I'm a real estate agent and bought one for a client. and I. We have a downstairs laundry room with no sewer. My little nephew soaked a sock in the laundry tub and we didn't notice. It was spilling and dripping all over the basement, wetting the insulation etc. I put one of these next to the washing machine a few months ago and this week I heard this weird squeaking sound. I went to the laundry and caught it just in time to avoid the same thing. It's so cheap and can save you a lot of repairs. Water = mold, so this little device is worth its weight in gold.
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