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wombosi 09-22-2010 07:16 PM

help with valve repair
 
i have these old style valves just past the zone valves. i'm not sure if they're shutoff or balancing valves.

http://bentraining.com/images/valve.jpg

anyway, they've leaked since i've had the house (2 years). it's only when i mess with it that it leaks, then after a few weeks it seems to stop.

i've taken one apart, just unscrewed the stem with the built-in double nut. no sign of any kind of graphite packing, or any rubber washers. metal on metal. the inside of the stem is threaded.

i also tried to unsweat one of them in hopes of putting in a ball-valve shutoff.
even after cutting the pipe (where you see the coupling) and opening the valve and draining all the water, then shopvac for more water, couldn't get it to unsweat. too much water in there. not enough room to chop it out and have enough pipe to sweat on the new valve.

so i'm left with the option of fixing it.

any recommendations would be appreciated.

thank you.

H. A. S. 09-22-2010 07:44 PM

Looks like you have plenty of room there, I'd just cut it out and replace with new valve.

oh'mike 09-22-2010 07:54 PM

You might be able to stop the leak with some new teflon packing under the cap nut--

But H.A.S. is right --best solution is to drain the system and replace any of the old gate valves with new ball valves.---Those gate valves are famous for breaking--in the off position--at the worst times possible.---Mike--

wombosi 09-22-2010 08:46 PM

thanks guys, but i'm wondering what part of "there's no room to cut the thing out and sweat on another one" you don't understand.

it's literally 1/2" of pipe and it's all covered in globs of sotter.

unless i can unsweat what's there, i'm not replacing it.

kenmac 09-22-2010 08:55 PM

If you can drain the water . You can unsweat them. If not try tightening the packing nut. I just read that you have taken them apart.. There should have been a small washer under the nut


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