Backyard Aquaponics
A place to discuss aquaponics

X2 dr luke. Its stress free.the three plumbers onsite today all agreed they would use pressure pipe for such a system......whether or not their right is besides the point,i just dont need to worry bout it and can research other things.

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Vinidex PVC Products

Chemical Composition  CAS Number   Chemical Name/s     Proportion 
9002‐86‐2  Poly(vinyl chloride) polymer    70 – 80% 
471‐34‐1   calcium carbonate filler     3 -16%     
Modifiers (chlorinated PE, &    0 ‐ 5%     Acrylics)     
Stabiliser & lubricants      1.6 – 6%  13463‐67‐7  
titanium dioxide     1.2 – 4% 

At this stage I'm waiting for a call back from the Vinidex lab regarding the foam core,

however from my experience the foam core would probable be made up of reclaimed plastics with a foam agent added the same agent is used in a lot of plastic moulding as it reduces the overall weight of the moulded product by 10 - 20 %

these foaming agents are nontoxic due to the fact that they are use through out most plastic moulding systems

can you find out the exact plasticisers that are used ? eg BPA, pthalates etc ?

All right!

Spoke to one of the guys in the lab at vinidex!

The Foam Core is reclaimed scape from Start up and Shut Down runs on the extrusion line, as I expected that it would be!

The reason foam coring has become prevalent is that it gives you a ridged large diameter pipe with out having to add more weight to the pipe length saves money keeps overall costs down and so forth!

DWV pipe is not tested for potable water! however 90mm DWV has been tested an can be used!
there is no chemical difference between pressure and DWV pipe except for the foam coring, i.e. same plastics and additives are used for both types,



Plasticizers are generally only used in the manufacture of flexible PVC pipe and as such are not a problem in AP but most flexible pipe is manufactured from PVC so if you use your garden hose to fill you fish tank then you are using a plasticized PVC product!

Double check.

1) Is that "MOST DWV is not tested, but the 90mm DWV is" or "NO DWV is test, but 90mm STORMWATER pipe is" or do you consider 90mm DWV and 90mm stormwater pipe the same thing

2) "there is no chemical difference between pressure and DWV pipe except for the foam coring" is that his words or your elaboration?

Thanks for doing this by the way

sorry to clarify!

PVC Must have a potable water test so it can be sold as "safe for drinking water"

DWV does not have this test preformed as it is not normally in contact with potable water sources!, How ever 90mm DWV has had the appropriate testing/certification to meet potable water standards, this may have come about due to the need to reclaim as much water as possible i.e. rain water, as 90mm is the most common pipe used

DWV comes in sizes ranging from 32mm to 300mm and is classed for drainage applications
This may be why the 90mm has meet potable water standards so it can be used for water reclamation



I have paraphrased His response, but as I stated above and was stated by the lab tech that the only component that is added to DWV over standard Pressure pipe is the reclaimed plastic which has a foaming agent mixed in to form the foam core of the pipe!

the reclaimed plastic is the start up purging's from the extrusion line and from the injection lines which make the bends and connectors

I have listed the MSDS for Vinidex PVC line above which out lines the components and additives used in the manufacture of all of the PVC pipe lines.

Living here in port Pirie some toxicity coming from the type of Pipe I use in my AP is completely over shadowed but the Lead smelter here which puts Lead, sulphur , cadmium and assorted Acid based vapours in to out atmosphere,

Thanks for the info, much appreciated !

Well I Hope its helped

Attention! this has only been taken from Vinidex, so please check with your local PVC manufacture as each process/formulation will vary a little bit from manufacture to manufacture!

Wow I didn't realize you were my next door neighbor here in Texas!!!!!!. In The Great USA!!!

We must have the same news channels and radio...............

Can you spell M__san_o?

Ok I'm going to bed before I really get started!!!!

The Idea of using Bamboo is intriguing but I don't think it would be plausible
IT would look cool though

Actually bamboo is water tight so there is no reason it wouldnt be feasible.
i dont think you will see it used in a commercial system though.

I have a piece of bamboo that holds some water down the bottom that i have been using for almost the last 10 years, always had water in it, doesnt leak.

The fittings are hard to get as well as the larger diameters.

lol i think you may have to make the fittings yourself.
larger sizes can get quite expensive.
not my choice, but feasible if someone really wanted to.

I wonder if you could get organic certification if you used bamboo as your pipe material?