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Old 04-12-2010, 01:37 PM   #1
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Partially blocked main drain?


Hi all, I would appreciate any input you could give me. I've got a 30 year old house. Single story on a concrete slab. My washing machine, kitchen and garage sink are on one side my house while two bathrooms are on the other side of the house. When my washing machine drains during its cycle the garage sink and to a lesser extent the kitchen sink back up with water. They drain themselves after 30 or 45 seconds. If I turn water on full blast at both sinks they drain fine so I'm thinking I just have a partially clogged main drain. Does that sound like an accurate assumption?

Should I snake from one of the sinks or would that do me no good? I've read that some main drains have a clean out access on the outside of the house. I've got a couple of capped pipes on the outside of my house that seem to fit the description but can there be more than one clean out access on the outside of the house? Thanks.

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Old 04-12-2010, 09:50 PM   #2
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Partially blocked main drain?


yes you can have a sanitary sewer and a storm sewer, pull both caps, run some water see what happens

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Old 04-13-2010, 09:50 PM   #3
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Partially blocked main drain?


id cable the branch line for the washer and sinks first to see if it helps
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Old 04-14-2010, 07:24 AM   #4
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Partially blocked main drain?


rereading your post: it is probably not the main if two bathrooms are running fine, your info indicates a restricted line past the point where kitchen and laundry join. could be grease, lint, sludge or a combination of things. if after checking the mains at the clean outs if they don't back up follow plummens advice
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Old 05-31-2010, 01:29 PM   #5
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Partially blocked main drain?


when we have problems in our 1942 built house we always start at the outside capped pipes then work our way towards the back of the house or other end of the house... and when you start to have the back up of water that is when you know where to 'snake' or fix the problem it may NOT be just the main line but a small pipe that as stated above is full of grease, lint, ect
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