DoggyDan
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I built a house a few years ago and have been finishing it as time allows. I'm working on a bathroom and changed the tub and toilet rough-ins. I moved the toilet rough-in to the next truss pocket. I cut back the 3" ABS waste line, added 45- and 22-1/2-degree elbows and a 12-inch horizontal run to the final location (a very gradual bend). This new section has a good fall into the existing horizontal run (the existing run has about a 20-foot horizontal run to the soil stack). A very reputable plumber roughed-in my house and used what appears to be a 90-degree vent elbow (both ends female with a fairly tight bend) instead of a closet bend. I have already replaced the elbow with a similar one but I am having second thoughts as to whether the bend is too sharp. If I replace it with a closet bend, I don't think that I can maintain a proper pitch without leaving the top of the elbow too hign in relation to the floor. This is a second-floor bathroom and the plumber did the same with a toilet on the first floor. The first-floor toilet is a 3.5-gallon model with no problem flushing. The new toilet is a 1.6-gallon model. I'm thinking that if the solids make it through the toilet trap, they will make it through the elbow. How much sharper is the bend in a vent 90 vs. a closet bend? I don't relish the thought of changing this as it is in a location that is very difficult to work on. Also. ABS fittings aren't available at area DIY centers, plumbing supply houses won't sell to non-plumbers, and I don't want to transition to PVC. I'd like to trust the plumber that roughed-in the house and keep the installation as is but I am interested in your advice.