Rubber Hose Sections installed in Grey Water Drain Pipe???

My son bought a used TT and the abs galley tank was cracked at the tank flange because the pipe and elbow were long and poorly supported. After repairing the and tank I cut the pipe and installed a rubber hose connector to relieve the strain on the tank. If most any of them had a hose near the tank you just about gut the drain pipe off the rig when hitting something etc and not most likely not hurt the tank.