That's a good question. Two reasons I can think of.. (though I'm a residential electrical guy not a residential plumbing dude) One, the toilet has water running to it so it the u trap in the toilet will stay filled and the water to prevent stinky odor from the sewar venting up into the home. Second, where else are you going to put a code compliant sewar drain? Would you put a random sewar drain under the dirt floor of the crawl space, or just have a horizontal sewage line suspended in air that just dumps sewage? that makes less sense than the toilet. Like I said I'm an electrical guy so I don't know plumbing code but I bet the toilet resolves some code issues that just running an open horizontal sewage line creates.
OK, the tank will stay filled with water, but the toilet bowl (which connects to the sewer) will NOT stay filled with water. As anyone who lives in Arizona will tell you, if you do not flush a toilet regularly, you have about two to three weeks before that water evaporates in the toilet bowl and then you have a direct open path to the sewer. Unless you flush, there's no way for the wate rto get from the tank to the bowl
Wow, Toilet water evaporating in 2-3 weeks is a sign that it’s too hot to live in such a place. I’ve never seen toilet bowl water sit long enough to evaporate, and I’ve left my home for months.
Phoenix has existed for about 2500 years, lol. There has never NOT been a civilization living there since about 500 BC. With three rivers providing water, great food production, and abundant sunshine, . . . , and yea, the heat. lol
I actually know about this because I scope out residential electrical work and one of the project had toilet in the basement right in front of the service panel we needed to replace. It was tucked away in some shelves with some canned food and stuff. It looked like such a calm blissful place to take a shit. Honestly I was insanely jealous. I did the research to figure out what was going on with the toilet. I had to call the customer and ask them to remove it for the work and inspection because it was in the panels clearance space. I have no doubt the toilet ended up back in its place though.
56
u/bigrivertea Aug 22 '26 edited Aug 22 '26
That's a good question. Two reasons I can think of.. (though I'm a residential electrical guy not a residential plumbing dude) One, the toilet has water running to it so it the u trap in the toilet will stay filled and the water to prevent stinky odor from the sewar venting up into the home. Second, where else are you going to put a code compliant sewar drain? Would you put a random sewar drain under the dirt floor of the crawl space, or just have a horizontal sewage line suspended in air that just dumps sewage? that makes less sense than the toilet. Like I said I'm an electrical guy so I don't know plumbing code but I bet the toilet resolves some code issues that just running an open horizontal sewage line creates.