Sorry if this is long but I'm desperate for help. I've had my house for about 11 years now. It's a slab house with a crawl space where all the plumbing is and was built in the 50's. I only have one bathroom and have never had a problem with the toilet clogging or anything until a few months ago. About 4 weeks ago I got a clog in the toilet that no plunging or auguring would clear. Roto Rooter came out and we discovered that there was standing water in my outside sewer clean out. Weird thing is I didn't have any problems with my other drains in the house. I live far off the street so we soon discovered my sewer line was 230ft long and the clog was at the very end of the line. They used a jetter to clear it and it all drained out and the toilet then worked again. Then about 5 days later the toilet clogged again but a plunger cleared it right up. This happened several times over the next few days. I double checked the sewer line was still clear and my bathroom sink drain goes directly into the drain pipe right under the toilet and it was fine too. The consensus from several plumbers was the toilet was just worn out so I bought a new American standard titan 1.6 that's advertised to flush a bucket of golf balls. I'm in the process of remodeling the bathroom anyway so I pulled the old toilet and went 5 days without one while we put new flooring down and replaced the cast iron toilet flange with a new plastic one, then installed the new toilet. All seemed good for a couple days and then it clogged with very little going down. Plunged it and it worked again. Since then it clogs almost every time you flush anything more than a few pieces of toilet paper. Pretty much the same as the old toilet. I noticed it didn't seem to have enough water in the bowl so I called American standard and they had me remove a small water restrictor from the fill valve and now it fills all the way. I thought this fixed it but then a few days later it clogged again and again. I checked my vents with a camera and snake and they are clean. All my drains have always made gulping sounds after you run water but I've heard that can be the s traps on them. I've pulled the outside sewer access again and it's clear and I had someone flush a piece of toilet paper down and could actually see it shoot by outside the house. To totally eliminate the drains I actually poured five 5gallon buckets of water down the toilet one right after another and I couldn't pour it fast enough. It went right down. I've had several plumbers out and they can't find anything wrong. American standard is now saying the toilet must be defective but what's the odds that it would be doing the exact same thing as my old one? I don't know what to do? Should I exchange the toilet for another one just like it or try a totally different model? Any ideas will help me. Thank you for listening.