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I have had this happen a few times but was always able to get it flowing again. What happens, after shutting off the main water supply to the house 1 bathroom faucet fails to "prime" for lack of a better term. The hot water side flows fine but the cold water side, nothing. After a day or so the cold water side will flow a bit with the valve slightly open but if you open it all the way the flow stops. Only happens to this one outlet.

I have had it happen in the past and have tried opening all the valves in the house, trying to completely evacuate the system and have got it to work, but I think it was luck....not sure how to do it again.

We are on a slab with overhead galvanized pipe (I know, horrible) if that makes a difference. Seems that this particular line doesn’t prime or something....very puzzling....any thoughts?

  • What kind of supply lines feed this faucet? There is a type which has a shutoff valve which closes if the line ruptures. A ruptured line has a higher flow rate and the valve is set to shut under this high flow rate. One brand is FloodSafe. Sometimes when the water is turned on after a shut off there is a transient flow high enough to shut the valve. – Jim Stewart Jul 21 at 18:07
  • I will check shut off valve – Rich Carr Jul 21 at 23:23
  • Nope...not a valve issue – Rich Carr Jul 23 at 15:31
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    Correction....Jim Stewart called it with the supply line, must have grabbed one of those mixed in with the others at the home improvement store...thx Jim – Rich Carr Jul 25 at 20:03
  • Was this a "FloodSafe" brand or some other brand? Probably it is still good. I would think that all you would have to do is shut the valve, then flush the toilet, then open the valve a small amount long enough for the supply line to fill with water. I think once the line is full you could open the valve all the way. This type of supply hose has a restriction orifice on the far end which only works if the hose is full of water. – Jim Stewart Jul 25 at 22:38

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