I bought last year a two-unit row house with a newly renovated downstairs unit, including bathroom. In my own recent renovation of the upstairs unit, my contractor gutted the bathroom to the wall studs and installed new pipes and electric, including a pipe vent in the wall behind the sink. <\/p>\n
The problem is that when the toilet in the upstairs unit is flushed, water gurgles and splashes out of the downstairs toilet. It soaks the underside of the lid, and spills onto the floor if the lid isn’t down. It could be a nasty surprise to someone seated on the downstairs toilet, and indeed is a bit scary just to see it happen. <\/p>\n
I did not test this before the upstairs renovations started, so I don’t know if this happened with the old upstairs toilet and pipes. My contractor thinks the issue is with the renovation that was done in the downstairs unit – that there isn’t proper pipe venting and air pressure in the pipes. He thinks he might be able to vent the pipe from the basement, but hasn’t spent much time yet investigating. Does this sound reasonable? Has anyone had a problem like this before? How big of an effort might it be to fix?<\/p>\n","protected":false},"excerpt":{"rendered":"
I bought last year a two-unit row house with a newly renovated downstairs unit, including bathroom. In my own recent renovation of the upstairs unit, my contractor gutted the bathroom to the wall studs and installed new pipes and electric, including a pipe vent in the wall behind the sink. The problem is that when…<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"schneps_byline":"","schneps_post_style":"","schneps_post_source":"","schneps_syndicated_read_more":"","schneps_post_source_sitename":"","schneps_syndicated_thumb_html":"","schneps_syndicated_thumb_src":"","schneps_post_source_shortname":"","schneps_post_source_url":"","schneps_post_source_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[198],"tags":[],"districts":[],"class_list":["post-3922","post","type-post","status-publish","format-standard","hentry","category-plumbing"],"acf":[],"parsely":{"version":"1.1.0","canonical_url":"https:\/\/brownstoner.com\/forum-archive\/2006\/03\/plumbing-proble\/","smart_links":{"inbound":0,"outbound":0},"traffic_boost_suggestions_count":0,"meta":{"@context":"https:\/\/schema.org","@type":"NewsArticle","headline":"Plumbing Problem: toilet backflow","url":"http:\/\/www.brownstoner.com\/forum-archive\/2006\/03\/plumbing-proble\/","mainEntityOfPage":{"@type":"WebPage","@id":"http:\/\/www.brownstoner.com\/forum-archive\/2006\/03\/plumbing-proble\/"},"thumbnailUrl":"","image":{"@type":"ImageObject","url":""},"articleSection":"Plumbing","author":[{"@type":"Person","name":"anon"}],"creator":["anon"],"publisher":{"@type":"Organization","name":"Forum Archive","logo":""},"keywords":[],"dateCreated":"2006-03-14T18:02:55Z","datePublished":"2006-03-14T18:02:55Z","dateModified":"2008-07-28T16:27:01Z"},"rendered":"