Has anyone here used a pressure washer & Clog Hog to clear a stubborn clogged main drain? The Drain King rubber do-dad at 50 psi won't budge my current obstruction. I can't dive to get to the MD inlet (way too old). My MD valve at the pad is 5' below water surface level, so I have plenty of gravity head, once the clog is broken. I couldn't find information on length of Clog Hog, but my MD inlet is about 25' from the valve. Once I break the clog, I will have to quickly re-assemble the gate valve, or I will lose all the water in the pool. I have plenty of experience on that score, as I have removed plenty of crud from the valve in the past without losing more than one or two gallons.