ive kept heaters for a backup, but then a friend had some go out and borrowed them and this and that and oh well the drip works perfectly to take care of it all, I mostly adjust it twice a year, once when the water lines get warmer for summer (cold water is not so cold) and for winter when cold water is super cold
It's all fine and dandy until something goes wrong with the cold line be it a clog, bad valve etc and then your dripping all hot water and your not around to catch it.
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