I plan on putting a two piece bath in my garage, it will be around 100' away from my septic tank. It won't be used often and I was wondering if might be making myself a lot of headaches. If someone has a crap and flushes, the sewage won't make it all the way to the septic tank before the pump shuts off. Now if the bathroom is not used for another couple of weeks or maybe a month will the sewage solidify and clog the pipe. If my math is correct the pipe volume will be around 16 gallons and at 1 1/2 gallons a flush that's a lot of flushes before it makes it too the septic. Any thoughts?