Be careful--12mm and 13mm products are not the same?
Have been using an earlier version of this product with "13mm" on the packaging (still 30m Holman weeper hose) connected to 13mm polypipe and behind a 200kPA PRV (measured with a gauge) without issue so far, and with only a small amount of water weeping out in a 30min interval. I inadvertently purchased what seems to be a newer version of this product with "12mm" on the packaging. This new one, to put it bluntly, appears to be completely useless. Instead of weeping slowly over 30min and resulting in the soil becoming adequately damp, it creates...a sudden flood within 2min. Same product but perhaps a different version/material being used, or poor batch quality control and one batch was 10 times more restricted than the other at weeping water out. Even as low as 10kPA (again measured with a gauge) the newer hose weeps out far more water than anticipated and new problems are introduced including uneven flow of water along even 4m of this hose (much more water output in the first 2m of hose, less in the tailing 2m) and problems with long mainline polypipe runs. Will be returning the hose and avoiding this type of product in the future in favour of pressure compensated dripline that are more consistent and accurate in their flow rate.
Garbage Cost me a fortune
Purchased this from Bunnings to slowly irrigate my front garden while away on a trip for 4 weeks. The tap had the restrictor and the hose split must have been within days. Came home to soaking from lawn, and then a $1000 water bill
I purchased 5 of these to service a series of long garden beds . Within weeks 4 had split so many times they were rendered useless. Also a holman dual tap splitter (brass) This failed at the braze .
The water pressure locally is not that strong so it is not a pressure issue.
I will never purchase Holman again.
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