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Old 06-13-2010, 07:09 AM   #1
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Water Shut-Off....Knurled Nut


I have a water shutoff that is inside the house (just before it goes outside to a silcock) and there is a little knurled nut on the side of the valve. Am I correct in saying this knurled nut can be loosened (after the valve is shut off)to drain off excess water caught in the short piece of pipe going outside ?
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Old 06-13-2010, 07:14 AM   #2
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Water Shut-Off....Knurled Nut


Yep--that's a drain cock. Just hope the installer put the valve in with the drain on the correct side!

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Old 06-13-2010, 11:55 AM   #3
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Water Shut-Off....Knurled Nut


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Originally Posted by oh'mike View Post
Yep--that's a drain cock. Just hope the installer put the valve in with the drain on the correct side!
Thanks Mike
What do you mean ?
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Old 06-13-2010, 12:58 PM   #4
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Water Shut-Off....Knurled Nut


I've seen them put in up-side down so the drain cock was on the pressure side--not the outlet side.
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Old 06-13-2010, 03:14 PM   #5
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Water Shut-Off....Knurled Nut


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Originally Posted by oh'mike View Post
I've seen them put in up-side down so the drain cock was on the pressure side--not the outlet side.
Ahh,,,Ok.
I'll check
Thanks again
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Old 06-13-2010, 03:29 PM   #6
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Water Shut-Off....Knurled Nut


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Originally Posted by oh'mike View Post
I've seen them put in up-side down so the drain cock was on the pressure side--not the outlet side.
I saw such a nut under our sink (as I was trying to figure out how we can cram a dishwasher nearby, but that's another story).. how would you know, other than by trial and error, if it was attached correctly? Is there an arrow or symbol I can look for?
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Old 06-13-2010, 04:06 PM   #7
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Water Shut-Off....Knurled Nut


Usually there's an arrow embossed into the main body of the valve to indicate the direction of flow!

The knurled petcock is installed on the house side of the valve, so that when the valve is shut off, water from the house can be allowed to drain back.

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