Regretfully, the system used to vent on your particular tank will not work if the vehicle is on any unlevel surface at all. Ours vents at the very top with a small backflow valve at the end of the small hose. First I would look for a cap that seals the tank tightly, and then figure out an alternative way of venting the tank, possibly by filling with water and actually fabricating another vent hole.
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Jim in Memphis, Wife of 51 years is Brenda
2019 F450 6.7 Powerstroke
2018 Mobile Suites 40RSSA
2021 40' Jayco Eagle
2001 Road king w/matching Harley sidecar
2021 Yamaha X2 Wolverine 1000
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