As some of you may have followed I ordered one of Raritan's new Vortex Vacu head the pressurized fresh water model. I have a Vacu-Flush and love it with one exception, when a certain better half has to do #2 they are so hard the Venturi will not break them up and I usually end up with a clog. Lets just say the particles are the same size as the Venturi and hoses (small Golf balls) and loads. I have a temporary fix I boil a 1/2 gallon on hot water in the microwave until it's so hot it's almost vapor. I poor it let it sit about 5 minutes and then boil another quart of water. Then I flush the unit and then flush the quart after the Vacu-pump build pressure and no more clogs. I have a feeling it's the medication she is on. The new head has a chopper and uses different programmable water levels I am hoping I never have to make any more Poop soup ever again! But it works. I am going to be talking to her doctor about stool softeners. Bill