Donnie, you need the specific unions to do that. The Union half piece and locking nut, 2 each, are part numbers, #312-A and 312-B, which are the union pieces that are glued to the cell, then you would only need to cut a section of 2" pipe to the same length as the cell and ensure when you glue it, it is the same length as the cell.
Another option would be a spacer Cell, #APK0006, which is a hollow cell with the unions attached.
Final option, we make a cap kit that will attach to the upper portion of the manifold and block off the water from flowing up, and instead, flow through the bottom manifold check valve. This is part number # 996, manifold cap kit.
These are all special ordered items, and you will not find them in stock at any pool store.
The union pieces are the cheapest option...it's about $22. The manifold cap kit is about $36. The spacer cell is about $56.
Contact JoshU at Saltpoolguys, who offers discounts to TFP members.
