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Old 10-19-2010, 02:59 PM   #1
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Floor Drain, require constant drip?

So i needed to get a floor drain installed in my garage because it is sloped inward. I thought it would be cheaper to install floor drain rather than resloping the floor out (not to mention the reduced ceiling height this would produce in the back).

The plumber told me something I've never heard before. That new code requires a water line to provide a constant drip in the floor drain so as to keep the water in p trap from sitting too long and evaporating causing the trap to loose its seal. Makes sense, but I've never seen one before.

Firstly, is this accurate?
Secondly, how is it done? What does it look like? I envision a water line running in the ground into the side of the floor drain, and a tiny hole to provide a trickle of water?


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Old 10-19-2010, 03:04 PM   #2
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Its called a trap primmer, some floor drains come with an inlet which is there to tie a water line into it.


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Old 10-19-2010, 04:11 PM   #3
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If you have a gravel filled pit instead of a floor drain pipe with connecdtion to the sewer you should not need to run a water source to that location.
The good conscientious technician or serviceperson will carry extra oils and lubricants in case the new pump did not come with oil or the oil was accidentally spilled, so the service call can be completed without an extra visit.
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