Treatment Plant Overflow leak

I found a leak in my overflow line on my sewer treatment plant. I have some drain field baffle connections leaking. It they were not installed correctly and this is 20 years of leakage. I would like to bypass the baffles with pipe. Have not been able to find any information on the baffles to pipe transitions. Does anyone have any ideas? I can't find any information on these plastic baffles. The guy who installed it is out of business.