How would you cap DW water line?


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Old 12-11-16, 07:46 AM
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How would you cap DW water line?

Hello all!
Removing old dishwasher, how would you cap off copper water line temporarily, if you needed time before installing new DW?

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Old 12-11-16, 07:56 AM
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Follow the line back under the sink, there should be a shut off for it, no cap needed.
If it's a saddle valve, your better off replacing it with a 1/4 turn valve.
Saddle valve tend to leak and plug up, not even legal in some areas.
 
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Old 12-11-16, 07:57 AM
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With a 1/2" brass plug and Rector T thread sealant. Sioux Chief 1/2 in. Lead-Free Brass Square-Head Plug-930-502001 - The Home Depot
 
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Old 12-11-16, 08:21 AM
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Originally Posted by joecaption

Follow the line back under the sink, there should be a shut off for it, no cap needed.
If it's a saddle valve, your better off replacing it with a 1/4 turn valve.
Saddle valve tend to leak and plug up, not even legal in some areas.
Thanks!
Following the line back under the sink, it appears to lead to a blue spigot valve similar to what I see on the outside of my house, for the garden hose.

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Old 12-11-16, 08:31 AM
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Remove the DW line from the valve adapter, it's 3/8" compression. Use two wrenches.
IF the valve doesn't shut off completely cap the compression outlet off.
Use a 3/8" compression cap with a ferrule inside (compression ring).
Also put a little pipe dope on the compression threads.

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I recommend you connect the new DW with a braided flex line.
 
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Old 12-11-16, 08:48 AM
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Originally Posted by chandler
With a 1/2" brass plug and Rector T thread sealant. Sioux Chief 1/2 in. Lead-Free Brass Square-Head Plug-930-502001 - The Home Depot
Thanks!
Where does this go?
 
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Old 12-11-16, 08:52 AM
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Originally Posted by Handyone

Remove the DW line from the valve adapter, it's 3/8" compression. Use two wrenches.
IF the valve doesn't shut off completely cap the compression outlet off.
Use a 3/8" compression cap with a ferrule inside (compression ring).
Also put a little pipe dope on the compression threads.

Attachment 74295

I recommend you connect the new DW with a braided flex line.
Thanks!
The new DW comes with this 5-ft 125-PSI Stainless Steel Dishwasher Connector:
https://www.lowes.com/pd/EASTMAN-5-f...nector/3190279
 
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Old 12-11-16, 09:27 AM
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That's a good kit. Let us know if you need help connecting the new unit.
The important thing is try to keep the existing valve if possible.
If it leaks a little after closing, cap it off and check for leaks.
Don't use the compression cap without a ferrule inside, it will leak.
 
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Old 12-15-16, 01:53 PM
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Thanks!
FWIW: I closed the valve and ran a "quick rinse" cycle (10 min) test...No leak at the valve. However, I did feel moisture, where copper water line connected to DW. Please keep in mind, I need old DW unhooked for extended period of time before installing new DW, during which time I don't want to keep my whole house shut off.

Copper water line connected to DW, where I felt moisture
[ATTACH=CONFIG]74454[/ATTACH]
 
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Old 12-15-16, 02:21 PM
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When I said check for a leak at the valve, that meant with the 3/8" tubing removed from the valve.
The valve might not leak at all, but you need to be prepared in case it does. Valves fail.

- Place towels and a drip pan under the valve, then close the valve
- Open the kitchen faucet to hot and keep it open until done
- Slowly loosen the 3/8" tube nut. Water will come out.
- You should know quickly if this water is under pressure (meaning your valve has failed) or just draining out

Let the valve drain, assuming it's good.
If it drips a little after draining seal off the outlet with the compression cap and ferrule.
 
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Old 12-28-16, 05:05 PM
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Thanks!
I haven't had a chance to check for a leak, yet but... That said, since, I don't have soldering skills, how about replacing the saddle valve with this?

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Old 12-30-16, 09:36 AM
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FWIW: Until I get back to this location, here are a couple of better pics of the blue valve, I took a while back:

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