I have this piece of mind automatic shut off valve on my washer hot/cold water lines so that the hoses are never charged unless we are doing a load of laundry. It was only about $50. I installed one on my washer hot/cold valves 10+ years ago, and one at my daughters house in 2019. They work great. It is a simple spring countdown timer that will stay open for about 1-2 hours.
I could not find it for sale online anywhere this morning. Amazon says temporarily unavailable. One would have to contact the company directly to see if is is still manufactured. There are similar 120V powered shutoff valves that can be found that are more expensive (in the $300 range).
https://www.keeneymfg.com/catalogs/K...eet-LIT100.pdf
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David
2019 Jayco Eagle HT 24.5CKTS (new to me 9/2022)
2016 F250 6.7L CCSB 4x4 - AirLift 5000
Anderson Ultimate 5th Wheel Hitch