My local rental company suggested I use their 3000 psi pressure washer to clean out my ceramic perimeter drains. They thought an auger would be too hard on the interior of these forty year old drains but that the pressure washer would do the trick and might even cut off some of the roots that have grown into the drains over the years. The washer comes with a 25 foot hose that should pretty well reach right through the drain from one corner to the next on the side of the house. What do you think?