How to fix reticulation zone low pressure after repairing a split?

Graciea92

We accidentally put a shovel through the PVC pipe that feeds the retic and a pipe from one zone of the retic that feeds a garden on drippers. I repaired it as I usually would (see photos) but after repair that zone no longer worked. I opened the repair up again to look and some water is flowing but a very small amount and low pressure. The other 2 zones (1&2) are working fine, normal pressure. Unlikely another burst in the zone 3 as the issue happened immediately after the fix and was fine before putting the shovel through. Wondering if there could be debris inside and if so what can I do, or if there's anything else I can check? Terrible timing as it's so hot and I'm having to hand water daily a newly established garden

Pic shows the repair of the white PVC pipe and the black is at the top of the photo

EricL

Hello @Graciea92 

Welcome to the Bunnings Workshop community. It's sensational to have you join us and thanks for sharing your question about your reticulation system. 

It's very likely that debris has entered your reticulation system and has entered zone 3. I propose doing a spot-by-spot check in zone 3 so that you can pinpoint where the debris has accumulated. This means removing pop-up sprayers and any other attachment that has been affected. Once you have the parts removed turn on your system to flush the debris out. Another method you can try is to remove the main split off from your system where zone 3 begins, perhaps a small stone got caught in the "T" branches. 

Let me call on our experienced members @Dave-1 and @Nailbag for their recommendations.    

If you need further assistance, please let us know.

Eric