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Old 07-01-2012, 07:51 AM   #1
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What size pipe should I install for retrofit drainage?


I would like to drain an area that could flood. Will 2- 1.5 inch pipes drain a 10 gpm flow if the pipes are horizontally at floor level. I do not want the water level to raise more than 2 inches. Your assistance will be appreciated.

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Old 07-01-2012, 08:26 AM   #2
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What size pipe should I install for retrofit drainage?


This is inside a building?

I suggest you use 2" pipe---more details please---how large is the room?

Concrete floor or wood frame?

existing building or new construction?

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Old 07-03-2012, 05:33 AM   #3
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What size pipe should I install for retrofit drainage?


Thanks oh'mike for your response

The home is a slab home with no floor drain. I would like to install drain but not go through slab so in event of flooding water level would not go above 2 inches as I have sealed 2 inch high molding and drywall above I would like to protect, the floors are ceramic. The home is 1700 square feet. I would have the pipe exit at floor level in two locations and be protected from insects with use of down spout immersed in antifreeze camouflaged and protected from animals, etc. In such a case do you think 1.5 inch pipe will be adequate?
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Old 07-03-2012, 06:24 AM   #4
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What size pipe should I install for retrofit drainage?


What you are doing sounds like you want to just put drain holes to the outside of the house--shielded by pipe--

It would work--but will look like a retrofit---kind of a mess actually---

Are you trying to avoid disturbing the tiled concrete floor?

I would suggest cutting in a small sump pit---done neatly the tile around it would not be hurt---Let the water drain right into the pit--pump the water outside or into the houses drain system.

Just a thought---better drainage---pit with cover would look better than a couple of pipes drilled through the outside wall of the house.
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Old 07-03-2012, 09:06 AM   #5
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What size pipe should I install for retrofit drainage?


Why are you worried about the area flooding? Can we try to address that issue instead?
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