Toilet Drains when Washer is running

Old 11-23-05, 07:29 AM
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Question Toilet Drains when Washer is running

Every once in a while, while my washing machine is running, the toilet completely drains. Is this normal?

Old 11-24-05, 05:49 AM
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sounds like the venting system is clogged
Old 11-24-05, 06:16 AM
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As Winslow said, the vent is either clogged or the washer drain may not be vented. Some people do not think a washer needs venting but that is not true. Drainage systems need air to operate properly. This is accomplished with a vent. If no air is available, it will seek its own source. This source is usually the nearest fixture trap. In your case, it's the toilet trap. At this time of year, birds sometimes use the vent pipe to build nests on as it is warm. Spiders also build webs inside the top portion and then leaves falling sometimes end up on top the web blocking the line. Another problem with webs is that dew collects and even though the vent air is warm, the condensation will sometimes freeze, blocking the pipe. If it is safe to do so, look into the vent pipe that exits the roof. If anything is blocking it, remove by hand and then flush with a garden hose. Good luck.

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