Drip irrigation compression fittings leak

[pacchiraku]

Hello, I have installed pvc in groud up to point of plants then switched to poly tubing for main lines. Pvc is 3/4" up to ball valve I have on each row, after ball valve uses reducer coupling to go down to 1/2", then used 1/2" dia. by 1" long comprssion fitting to accept the tubing. All this glued in with reg pvc primer and glue. After the compression fitting I then inserted Antelco Xpando grommrt along with its xpando fitting takeoff and hooked up tubing to that along with 2 metal clamps you screw on to tighten. This is the point where it leaks, looks like the tubing is too big as it slipped over takeoff without any pressure but I screwed them on as tight as I could. Looks like leaking from grommet area just can't tell. Any suggestions to stop the leaks? Not all of them are leaking though. Hmmmm

[valley]

pacchiraku, How you doing. Let me try to understand what fittings you've used.

Is the poly pipe inserted into a fitting or is it a barbed fitting that is inserted into the poly pipe? Nether of these fittings should be glued. Any fitting that is intended to be glued and leaks can be cut out and replaced.
If you've used an alligator type fitting and forgot to install the ferrule it will leak. If you get back to me, a picture would be great, I'll be happy to help you with this.

Richard
Get

[pacchiraku]

Thank you Richard. I have the pic. attached of the fittings. 1st on left is 1/2" compression fitting that was last item to be glued and to pvc reducer. No more glue after this point. Then 2nd item in pic is 13 mm Antelco grommet inserted into compression fitting, 3rd is the Antelco 13 mm barb snapped into grommet. The 2 collapsible fins on one end of barb goes into grommet first holding it from sliping off. Then the poly of course is attached on other end with two small 1/4 - 5/8 metal clamps. Hope this helps.

[valley]

Sure it does, thanks for taking the time to get back with the picture. If it's leaking past the collapsible fins, the fin or fins have a cut in the edge or a piece of straw/something is holding the fins away from the ID of the grommet. if the leak is where the grommet is inserted there is a similar problem.
A drop or two is somewhat commom and can be OK in the garden, if it is squirting, than the fitting has to be replaced or the object removed.

Is that where the leak is?

I made a connection using a barbed fitting jammed into a threaded fitting glued in place, I had no proper fitting and many miles to a city from the lower ranch, it does drip a bit but I can put up with it where it is.

Hope this helps, those fittings are not easy to take apart but it can be done.

Richard

Wondering where you're located.