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View Full Version : 3/16 tubing outside diameter? Push to connect fittings?


DRoseum
11-01-2020, 05:39 PM
What is the outside diameter of most 3/16 tubing? Specifically interested in the leader lateral line OD.

Is it 1/4-inch or 5/16- inch? Or something else?

Anyone ever use John Guest style push to connect fittings to build a small manifold and connect 3/16 lines to a diaphragm pump (like shurflo or aquatec)? Or is everyone using barb fittings to connect the 3/16 lines?
DrTimPerkins
11-01-2020, 07:05 PM
They don’t hold well if there is much stress put on them in tension.
DRoseum
11-01-2020, 07:26 PM
Plan was to use braided rope slid over the tubing to take up the tension before connecting to the manifold.
Mitchell tapper.
11-02-2020, 07:38 AM
5/16 will work. As Dr. Tim stated, probably shouldn’t use under tension. I use the rope as well to tighten then tie into my diaphragm pump with the push locks. Makes it convenient to switch out pumps. There is an issue with the outer diameter measurement not running consistent. Sometimes they fit and lock fine or you may buy new a roll, even from the same manufacturer, and the line will be too small and not grab. In that case I heat a tapered punch and swell it.
Biz
11-02-2020, 08:26 AM
The OD seems to vary depending on type. I just happen to have a couple pieces of tubing and a caliper handy, Leader 3/16" rigid measures 0.30" OD with my calipers. CDL 3/16" semi rigid measures 0.325", a little bigger than 5/16".

Dave


What is the outside diameter of most 3/16 tubing? Specifically interested in the leader lateral line OD.

Is it 1/4-inch or 5/16- inch? Or something else?

Anyone ever use John Guest style push to connect fittings to build a small manifold and connect 3/16 lines to a diaphragm pump (like shurflo or aquatec)? Or is everyone using barb fittings to connect the 3/16 lines?
DRoseum
11-02-2020, 11:03 AM
Very much appreciated!
buckeye gold
11-02-2020, 12:10 PM
I have leader semi rigid and I have used 5/16th but only on the low ends of my laterals where they won't disrupt natural vacuum, they will slip and they may leak a tad, but they are handy to have on hand for fast repairs. I have cut a leaking line and stuck one in temporary until I can do a proper fix.