House shut off valve packing nut cracked

[wmn]

My nephew had a slow leak at the house shut off valve. A coworker told him to tighten the packing nut to stop the leak. He used a little to much muscle and cracked the nut. Can we keep the valve closed, remove the knob, and replace the the packing and packing nut without shutting the water off at the curb since it's off at the valve? Are the packing nuts a standard size? will one from another 3/4" valve fit this?

 

[Reach4]

Can we keep the valve closed, remove the knob, and replace the the packing and packing nut without shutting the water off at the curb since it's off at the valve?

You might be able to keep the valve full open, while you do those things. Not sure. https://terrylove.com/forums/index.php?threads/replacing-a-main-shut-off-valve.81392/#post-588303

Are the packing nuts a standard size? will one from another 3/4" valve fit this?

I don't know those things. I would try to figure out make and model.

I would want a "curb key" standing by before attempting repair. Search for that term.

 

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[John Gayewski]

When you remove the craked nut there will be nothing but the friction of the wedged washer holding the water back. The stem could come shooting out at you and you'd be flooding real fast. That being said you might be able do a quick swap, but it's a big risk that isn't worth the reward.

 

[Sylvan]

Try to buy the exact valve and take the packing nut off the new one, and replace just the nut. Keep the valve closed when doing this, and be careful

By the way, the original installer used the wrong type of valve on the main, as it takes a certain mentality to use a globe valve that has a washer and is not known for being a positive shut-off off.

 

[Fitter30]

Close the vslve then open house side uptaking off most of the pressure. Take telfon tape twist it to a string wrap a few turns around a cleaned stem before threading the nut back on. Nut bottoms out add some more telfon.

 

[Sylvan]

Close the vslve then open house side uptaking off most of the pressure. Take telfon tape twist it to a string wrap a few turns around a cleaned stem before threading the nut back on. Nut bottoms out add some more telfon.

Rather than using Teflon tape, I use Teflon packing that comes in various thicknesses

Great for larger valves as well as smaller diameters. Works great on packing glands for pumps

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[Fitter30]

Rather than using Teflon tape, I use Teflon packing that comes in various thicknesses

Great for larger valves as well as smaller diameters. Works great on packing glands for pumps

Anti-Seize Technology Valve Stem Packing 19155 | Zoro

Order Anti-Seize Technology Valve Stem Packing, 19155 at Zoro.com. Great prices & free shipping on orders over $50 when you sign in or sign up for an account.

www.zoro.com

I've used and did carry some that was 1/8" round but small valves tape seem to work.

 

[Reach4]

Close the vslve then open house side uptaking off most of the pressure. Take telfon tape twist it to a string wrap a few turns around a cleaned stem before threading the nut back on.

Are you proposing to re-use the cracked nut? I wonder if that nut could be reused if a worm gear hose clamp was placed around it. Of course locating a replacement packing nut would be best.

 

[Fitter30]

Are you proposing to re-use the cracked nut? I wonder if that nut could be reused if a worm gear hose clamp was placed around it. Of course locating a replacement packing nut would be best.

To see if they can still find that same valve just use the nut. Having 60+ lbs of pressure for that nut to hold the packing in nut has to right.

 

[Sylvan]

I've used and did carry some that was 1/8" round but small valves tape seem to work.

When I was a stationary engineer, I used it to pack a lot of pumps and large steam valves 8'-10" on the smaller valves stuffing box I used a razor to trim the Teflon, as it seemed to work better than taking tape or rolling it into a strand

Graphite was the best, but they outlawed asbestos

 

[Fitter30]

When I was a stationary engineer, I used it to pack a lot of pumps and large steam valves 8'-10" on the smaller valves stuffing box I used a razor to trim the Teflon, as it seemed to work better than taking tape or rolling it into a strand

Graphite was the best, but they outlawed asbestos

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