I, and several other resident in my area of town, have been on a pressureized sewage main and grinder pump system for 17 years now. We were force to go to this system because of a bylaw not allowing septic tanks in town limits anymore. This is what I know about these kinds of system. Plain and simple...THEY SUCK!!! I, and several other residents, have had nothing but problems with these pumps plugging up and wearing out. In 17 years I have gone through 4 pumps and just installed my 5th one in March. At $1800 a crack that hurts. And like mentioned in above posts, your if it's on your property it's probably your problem. I pay the same for sewage as everyone else in town but I have to deal with the issues and extra costs of new pumps around every three years. If I had to call a plumber everytime I have an issue with it, I wouldn't be able to afford to live where I do. My family is extremely carefull of what we put down the sewer system. From my past experiences, there is no way I would even consider a garborator of any sort. The less you put down the sewer the better off you will be. We will not even flush kleenex down the toilet. We buy the cheap toilet paper that prety much disinigrates while you are using it. It plugs up so often that I eventually installed cam lock quick disconnects on the discharge line to save time and work when unplugging it. I have no idea if the design of the sewage main has anything to do with it or not. At least the town is saying it doesen't, go figure. I would suggest talking to some of the other residents in the area on the same system and finding out what is working or is not working for them. When you do install this system make it as user freindly to work on as you can. My main project this summer is to build a dedicated heated building to house my grinder pump system. It will be set up with wash down hose, hoist system and a custom fabricated pump box. The pump box/basin that comes with these systems is not very big and the pump takes up most of the room in the Dawson. Because of the small volume left in the pump cycles on and off alot during the course of a day. I beleive this is what is wearing the pumps out. When it plugs up, it is usualy because when pump cycle is done and the pump stops as a peice of toilet paper is sucked into the cutter system, when the pump starts back up again, it doesn't have enough power to cut the toilet paper an start pumping and eventualy the high level alarm sounds. I have changed out the start and run capacitorsin a few of them and it helps out some but eventually i have to buy a new pump. I have tried new shredder rings and cutters but thats just seems to be a band aid fix as well like the new capacitors. I don稚 mean to scare you about this type of system and I wish you luck. Hopefully you will be one of the lucky ones like my neighbor, they致e had no issues that I know of. I will help you out in any way I can if you need any because I wouldn't wish this problem on my worst enemy. It痴 always a concern of mine when I leave town and the wife and kids are left there. They know nothing about it.