We jetted a line at a restaurant (non grease).The restaurant is 125 (+/-25) yards from the shoreline. The line runs from the kitchen catches the ice machines, hand wash sinks then runs down stairs into the basement (I think this is one of the only 10 buildings with a basement on Maui) then into a lift station where it is pumped up to the to the man hole tie in.
As we were jetting in down stream at the lift station we were blown away on how much sand was coming out. Of course you start rationalizing it thinking, well this line has never been maintained, its 30 years old, and it also serves the bathrooms in the basement that have showers and people come and shower here after the beach before work, etc.
So we camera'd it of course at we kept seeing this bed of sand in it at certain points but man was that 4" CI clean as a whistle, to the point where it was kind of hard to tell where the transition from ABS to CI was.
Long story short we dug up a section and sure enough there was no bottom to the pipe. Why? Well because its 30 year old CI that is sitting in, yes IN sea water. We removed a 4" slab and boom we were at the beach.
We ended up re-routing the line and renovating the bathrooms as well. It was interesting working in a trench that was half way filled with water because we were below sea level. About 8K in work including the jetting. So the jetting made us aware of the problem and in a sense created more work for us. Just wish I had a twisty jet because getting around some of those bends was tough...:winkold:
I had a good time on this job,for a couple days!!!