My dad recent dug the small pond at our camp deeper. As part of the process, he was able to raise the bank some on the low side. Now that the bank is higher, the overflow pipe is too low. We need to raise the overflow about 12", with roughly 6" of overlap on the existing pipe. Does anyone have any thoughts on an economical way to do this? 12" PVC pipe comes in 10' lengths and is roughly $225 with another $50+ for the coupler.