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Old 08-01-2018, 01:35 PM   #1
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Pex

What's the tighest radius PEX can handle?
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Old 08-01-2018, 02:12 PM   #2
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What's the tighest radius PEX can handle?
https://www.pexuniverse.com/pex-tubing-technical-specs

8xOD
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Old 08-01-2018, 02:18 PM   #3
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So 4".
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Old 08-01-2018, 02:36 PM   #4
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So 4".
You're using 3/8" PEX? That's pretty small.
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Old 08-01-2018, 02:54 PM   #5
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You're using 3/8" PEX? That's pretty small.
You said 3/8" not me. I'll be using 1/2" for heating the floor. That's why I needed Radius/diameter to know how closely I can line them up.
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Old 08-01-2018, 03:24 PM   #6
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Edit: Duplicate info
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Old 08-01-2018, 03:32 PM   #7
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You said 3/8" not me. I'll be using 1/2" for heating the floor. That's why I needed Radius/diameter to know how closely I can line them up.
1/2" PEX tubing has an OD of 5/8" which requires 5" radius.
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Old 08-01-2018, 04:04 PM   #8
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Marc, check pics of our floor heat, we put the heat spreaders pretty close together and by running loops in parallel you will have less tight curves. Most low power hydronic heating pumps are better on volume then on pressure so reducing the length and getting several loops in parallel will do a better job. Also in case of a leak you can shut one loop off without loosing all the heating .


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Old 08-01-2018, 04:11 PM   #9
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Marc, check pics of our floor heat, we put the heat spreaders pretty close together and by running loops in parallel you will have less tight curves. Most low power hydronic heating pumps are better on volume then on pressure so reducing the length and getting several loops in parallel will do a better job. Also in case of a leak you can shut one loop off without loosing all the heating .


later J
Link?
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Old 08-01-2018, 04:56 PM   #10
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Marc,

http://www.skoolie.net/forums/f11/no...lie-18128.html somewhere in the last 5 pages


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Old 08-01-2018, 04:58 PM   #11
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Marc, sorry , page 37
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Old 08-01-2018, 06:34 PM   #12
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Marc, sorry , page 37
Got it.
In the future it might be easier to use post# as we have our threads set up differently. Yours reads first post first, mine is set to show last post first, so your page 37 is different than mine.
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Old 08-01-2018, 06:38 PM   #13
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I made mine just a tad tighter, somewhere around 3.5 inch I think. That was in the floor. For general plumbing I used the radius thingys I believe they are 4 inch.
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Old 08-01-2018, 07:55 PM   #14
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I saw in Lowe's they have the metal radius thingys for tight bends in PEX. I do believe you are correct at 4" for the 1/2 tubing.
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Old 08-01-2018, 08:30 PM   #15
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I saw in Lowe's they have the metal radius thingys for tight bends in PEX. I do believe you are correct at 4" for the 1/2 tubing.
I originally asked what the tightest radius for PEX was. The reply was sort of correct. I had asked for radius and the answer was diameter. My reply was to clarify the correct radius. That post had a link that showed the correct radiuses It showed an 8"diameter for 3/8" and 10" diameter for 1/2".
I plan on 1/2" and saw the chart for the correct number.
I checked Lowes and saw 2 piece plastic corner pieces, 2pcs. being one for 2 different lines to make a 90 bend, didn't show them together for a 180 bend. Do they have anything for a 180? I don't need one, should lay tight in the distribution strips and tighter in the radius in the rigid foam.
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Old 08-01-2018, 09:14 PM   #16
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Funny I was in Lowes this evening, would have looked closer to get better details. I do not remember seeing a 180, just the 90's.
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