Grey Tank Leak

[Hamlej]

Discovered about 30 gallons of grey water from kitchen sink sitting in the belly of the trailer. Removed the coroplast and found a leak at the clamp where it exits into the dump valve. Not sure what to do as the pipe was cut to short before insert into the tank. It needs to be about an inch longer for the clamp to tighten down around the pipe. Any suggestions would be appreciated.