BLOWING UP & BURPING TOILETS: CAUSES & PREVENTION Author: Ed Fitzgerald First it’s good to know that although the words, “blowing up” are used,  nothing really explodes. WHEW! Truth is it all comes down to airflow venting and airflow restriction. So let’s start with venting… Through the early 1980s, four inch vent stacks ran out of many homes, and within three feet of that stack are the toilet, the sink, the bathtub, and they're all...

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