WW Part# 62045* ********(2” Check Valve) :$130.00
WW Part # 65907*********Qty of 2 *(2”Close Nipple) : $7.96
WW Part# 66387-4N* **Qty of 2 (2” Nylon Street Elbow) : $14.20
Total of “All” items: $152.16
With the understanding that you will reuse the tank Bung and Screen Filte
You may try that 1st. Sometimes the larger check valve solves this issue, as the Cat takes a larger initial bust, than does the General or HyPro