Vampress_me is correct. If you find it necessary to change the anti siphon valve you remove the shower valve assembly. Those of us with bigger hands have fun (not). While under the sink is more common, behind the shower is not a Keystone only thing.
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2012 Copper Canyon 273FWRET being towed by a 1994 Ford F350 CC,LB,Dually diesel.
Airlift 5000 bags, Prodigy brake control, 5 gauges on the pillar.Used to tow a '97 Jayco 323RKS.
Now an RVIA registered tech. Retired from Law enforcement in 2008 after 25+ yrs.
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