I have followed all the threads about the best way to clean the cartridges from my filter. I have a large filter--the cartridges are about 4 feet long and I have 4 of them! I can soak one end of each in a 30 gallon trash can and then flip them to soak the other end. I have my dishwasher detergent (cheap stuff from Costco) and I have plenty of muriatic acid. How do I empty the trash cans into the waste drain between/after soaking? This is a lot of heavy liquid that I don't want to haul around. I do have a sewer line cleanout near my equipment that I regularly open to drain off pool water in the winter (handy hose bib provided in pool plumbing for this purpose). Should I just install a bib at/near the bottom of the 30 gallon can and use a short piece of hose to drain into the cleanout?