[permaculture-oceania] Grey water reticulation

[brookman]

Dick
'sub-surface' installation is the turning point of the matter...here we 
interpret that as sub 100mm of mulch (the surface being the surface of the 
mulch and the mulch being applied only where there are jab injectors or 
drippers with their guts removed) . David is spot-on. We have had a system 
going for many years. The average family can irrigate 20 fruit trees. We 
have not found any need to regulate the system.
Chas Martin has installed scores of the systems in SA; legally
graham


----- Original Message ----- 
From: <davidarnold at iinet.net.au>
To: <permaculture-oceania at lists.cat.org.au>
Sent: Sunday, June 11, 2006 9:54 PM
Subject: Re: [permaculture-oceania] Grey water reticulation


> Hi Dick,
>
> I think you need to be careful not to overwater, so I think you need to 
> retain control
> over when the grey water goes to each tree.  That means valves, and 
> another option
> for the water to go to when the fruit trees are well enough watered.
>
> Keep the pipe sizes on the large size to avoid blockage.  Use LDPE, which 
> is the low
> density polyethylene not suited to constant pressure but to open flow, and 
> is cheaper,
> with cheaper barbed and clipped fittings.  Perhaps 19 or 25mm LDPE to each 
> fruit
> tree, delivering into a pocket of gravel in the soil.  I used 25mm, but 
> that was just open
> flow on the surface, moved every day in a rural orchard.
>
> Better than that is what Ross Mars showed he has done in Perth backyards, 
> which is
> delivering only under coarse mulch, not under soil, as everything will 
> block eventually
> so plan for maintenance access, and to check that flow is happening.  For 
> the council
> inspection just make sure the mulch layer is suitably thick.  Then I 
> reckon you could
> use 13mm to each tree, from say 25mm "sub-mains".
>
> Water weeper recycled rubber tubing will definitely block very quickly.
>
> Regards,
>
> David Arnold davidarnold at iinet.net.au
>
> 4446 Murchison Rd, Violet Town  VIC  3669
> 03 5798 1679 0428 981 679
>
>
>
>> I am seeking advice about reticulating grey water to young fruit trees
>> in a backyard garden.
>>
>> Our city council (Brisbane) is requiring that grey water be sent first
>> to a surge tank and then be reticulated at least 100mm below the
>> surface. I have found a source of cheap recycled drums to make a surge
>> tank with but I am having difficulty working out the best option for
>> the under-surface reticulation.
>>
>> One off-the-shelf option that I have found is 13mm purple sullage hose
>> with non-blocking drip holes, but only one hole every 300mm. This
>> comes in a minimum length of 200m and costs $428(!) - way too
>> expensive and the holes would seem to too far apart. The other option
>> is 50mm slotted ag-pipe, which seems to be too large a diameter for
>> watering a young fruit tree. One irrigation supply fellow suggested I
>> use 19 mm poly pipe and drill or cut my own holes or slots in it.
>> There is also a 25mm unslotted ag pipe, which I could drill or cut
>> holes or slots into. Has anyone had experience of doing that and what
>> size holes or slots did you use? We have a silty clay loam soil so
>> small holes may get blocked by clay particles or by particles or gunge
>> in the grey water or by fine roots.
>>
>> There are a few other products designed for fresh water use, including
>> the brown 'Drip Eze' tubing, the black and blue 'Drip Tube' and the
>> recycled rubber 'Water weeper' tubing? There are also the trickler or
>> drip irrigation fittings that you punch into poly pipe. Has anyone
>> tried any of these with grey water under the soil or even under deep
>> mulch?  Also, how did you filter the grey water?  The filters
>> available for fresh water irrigation are very fine and would need
>> cleaning every second day, I would imagine, if used with grey water.
>>
>> I trust others have faced this problem. I hope you can share your
>> experiences with me.
>>
>> Dick Copeman
>> 17 Lindon St, Dutton Park  4102
>> Ph 07 3255 0731, Mob 0439 728 992, Fx 07 3411 5530
>>
>>
>>
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