Exactly. Bob I also sent you an email. That's the valve I wrestled with this week because my pump would not pull water out of the tank. I then realized that valve had to be open for for the pump to pull water out of the tank.
2005 Newmar Kountry Star gas 3742, Workhorse 8.1L w/Allison 5 speed.
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2019 Tiffin Phaeton 40IH
2005 Newmar Kountry Star Gas (Sold)
2017 Grand Cherokee or 2017 Harley Ultra in tow
JT, Em & the boys, Kong & Baxter (rescued grey tabbies)