My anti-siphon valve was located between the refrigerator and the shower wall on my 3150RL. It started leaking and the water ran down into the basement and down into the underbelly and out the front leg.
After I removed the anti-siphon valve, I found that a stink but had crawled up and got between the flapper and the O ring that allows the air in to anti-siphon.
So, I cut it out and reconnected the 2 pipes with 2 90* sharkbites.
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