This morning I laid the main retic line for a client in Jindowie (a part of Yanchep). I’ve written before about water pressure issues in this part of the world and today we hit the same problem again.
I use Richdel solenoids 99% of the time, but today they wouldn’t seal. They need a certain amount of backpressure and the water being what it is up here I just couldn’t get them to work.
I changed them for Hunter PGVs and they worked fine. I’m not sure why Hunters will operate with the lower pressure, but they seem to be the answer when the Richdels fail.
Lucky I had 4 onboard to subsititute!
The first time I did some DIY retic I tried to install my kerbside sprinklers by digging along the line of the kerb.
After 10 minutes I had all but given up. You see the soil along the kerb is actually roadbase. It is hard and rocky and not easy digging. If you want to install sprinklers along the kerb then dig a trench one metre away from the kerb and parallel to it and then ‘t’ off to the point where you need sprinklers. You will still need to do some hard digging but it will save you a lot of effort and you will do the job right.
The other tip with kerbside sprinklers is to make sure they are well below kerb height – because they will get driven over. If you’re lucky they won’t get damaged, but if they are even sticking up a little bit then expect to replace them regularly.
I get calls from one client a few times each summer to replace the same sprinkler. Personally I reckon it would be easier just to sink the sprinkler a bit lower…
If you are using miniscape / netafim sub-surface irrigation then you need to know the following:
a) The pipe (brown stuff) should be laid at correct spacing – for example some miniscape is rated at 30cm intervals and it needs to be laid accordingly.
b) It needs to run for around an hour to apply the correct amount of water.
c) The picture above is of the line flushing valve. When you turn the system on this will release water for around 30 seconds. It can look like your retic is ‘leaking’ but its not. Its normal.
d) You shouldn’t have more than an 8m run of brown pipe before it plugs back into the poly. You will lose too much pressure otherwise.
e) You should have a vacuum valve at the higest point of the system
f) You can also add filters to ensure the water is free from contaminants