My shower was draining a little slow so I put the zep drain cleaner enzymes down the drain for 3 days in a row then flushed with a garden hose, drains perfect, but while I was doing that I heard a gurgling from the toilet...there was water bubbles coming up to the toilet bowl!!! I heard this gurgling before but never actually saw the water bubbles....the shower is upstream from the toilet....is this an indication of a venting problem? This is in a smaller house that sits behind a larger house, at some point I noticed when they plumbed the smaller house they didn't put enough slope on the main drain and there's standing water there ...is this related or a seperate problem and is there any fix it without digging up the yard and under the house??
thanks
thanks