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Old 12-07-2015, 10:19 AM   #1
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Whole House Humidifier Plumbing


Hello, I am currently working on installing a whole house humidifier and am having trouble figuring out how to plumb the waterline to it.

The closest existing line is in my water heater closet, and the line I need to cut a tee into is 3/4-inch PEX. The humidifier calls for 1/4-inch O.D. copper. I would also like to put a shutoff valve right after I cut into the existing PEX.

The nice lady at Home Depot put together a package of fittings totalling over $90 and it included 6 sharkbite connections (2 to tie into the existing PEX, 2 between the sharkbite tee and the valve, then two reducing it down again to 1/4"). If at all possible I would like to eliminate as many of these connections as possible, as I have heard they tend to leak over time.

I have read that some people have used a fitting like the Watts P-667, which does it all, except that it is made for existing 1/2" PEX and I have 3/4".

Can anyone help me figure out a more streamlined solution? Thanks for any help you can give me.
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Old 12-07-2015, 01:38 PM   #2
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3/4 x 3/4 x 1/2 Sharkbite tee $14
Short stub of 1/2 copper or PEX tubing (say 3") $1
1/2 Sharkbite male adapter $6
1/2 Threaded ball valve $8
1/2 x 1/4 brass bushing $4
1/4 compression male adapter $5
1/4 copper tubing to humidifier


If you have access to PEX crimp tools you can eliminate the Sharkbites (expensive) and use regular PEX crimp fittings
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Old 12-07-2015, 01:51 PM   #3
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Thanks for your reply. I have access to a PEX crimping tool.

So, 3/4x3/4x1/2 regular tee
Short stub of 1/2 PEX
1/2 regular male adapter (do they make this?)
The rest the same?
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Old 12-07-2015, 01:58 PM   #4
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Rest the same. Plus a few 1/2 and 3/4 crimp rings
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Old 12-07-2015, 02:05 PM   #5
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Do you have pictures of these two items?

1/2 x 1/4 brass bushing $4
1/4 compression male adapter $5

The other stuff I'm pretty familiar with, but these two are the elusive ones.
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Old 12-07-2015, 02:13 PM   #6
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I'd go 3/4x1/2 tee. Then 1/2x1/4 angle stop. You should be able to find both in sharkbite. From the stop valve run 1/4" to the unit
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Old 12-07-2015, 02:23 PM   #7
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Eplumber has a great idea:


1/2" PEX barb to 1/4" compression stop.
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Old 12-07-2015, 02:25 PM   #8
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Quote:
Originally Posted by TheEplumber View Post
I'd go 3/4x1/2 tee. Then 1/2x1/4 angle stop. You should be able to find both in sharkbite. From the stop valve run 1/4" to the unit
I had come to this conclusion as well at the store, then an assistant manager came to ask me if I needed help and talked me out of using sharkbite, saying they will leak. Then he sent me his plumbing manager that loaded me up with sharkbite.

I guess the real question is, do they leak? Is it worth spending a little extra money to eliminate them?
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Old 12-07-2015, 02:27 PM   #9
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Quote:
Originally Posted by rjniles View Post
Eplumber has a great idea:


1/2" PEX barb to 1/4" compression stop.
I like it! So...
3/4x3/4x1/2 PEX Tee
Small piece of 1/2 PEX
1/2" PEX barb to 1/4" compression stop (as shown above)
1/4" Copper to Unit
Two 3/4" and 2 1/2" PEX rings

I'm guessing I won't find that 1/2" PEX barb to 1/4" compression stop at a big hardware store.
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Old 12-07-2015, 02:28 PM   #10
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Quote:
Originally Posted by soonerce View Post
I had come to this conclusion as well at the store, then an assistant manager came to ask me if I needed help and talked me out of using sharkbite, saying they will leak. Then he sent me his plumbing manager that loaded me up with sharkbite.

I guess the real question is, do they leak? Is it worth spending a little extra money to eliminate them?
I would not be afraid to use them in that application, but I am a cheap a$$. The Sharkbites are a lot more expensive than regular PEX fittings.
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Old 12-07-2015, 02:30 PM   #11
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And the orange or blue aprons are not the best place to get advise.

And be real careful about listening to any of us. LOL
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