Backyard Aquaponics
A place to discuss aquaponics

I'm with KP on this, so it might depend on the area you live in - my local plumbing store is way cheaper than "B", I use "B" to get the correct name and buy at the local (if the price is right )

We just brought 40mm plug and waste set ups and the 40mm pipe does not quite fit so had to machine out and go a little deeper in a lathe, which is another option?

If all else fails.... use a lathe or hot oil... you can make anything fit...

If you're going to do that tim, it's advisable that you go out and buy a large pressure fitting a reducer, some of these are made with wall thicknesses of up to 10mm... lets you do almost anything without compromising structual integrity... hint: don't look for these fittings at your local B store.

Hmmm... do we really need to worry about structural integrity on a stand pipe? After all, it just stands there.

My experience says that when turned down to 1mm or less, PVC become VERY flexible... I'd prefer rigidity, a root could move 1mm PVC, and there will be the weight of all that gravel...

Perhaps it doesn't matter, but my motto is: If you can afford it; over-engineer it!

...have noticed that :tongueplacedfirmlyincheek:

sorry KP - couldn't resist

taken as a complement LKB...

just realised LKB = ellKayBee, am I assuming they're your initials? if so, I like the nick. I rarely phonetesise - is that a word? so didn't put 2 & 2 together...

that's our Les

Yep - that's it - got labelled elk at one time and you might see this around on some of the threads referring to me also -> <-

Here it is - phoneticize

Maybe americanised tho

Hi folks,

Can someone sketch a diagram of a standpipe?

on my systems I use a large diameter tall pipe (overflow) next to a short thin pipe with adjustable valve (slow drain)... so two pipes discharge back to the fish tanks. One when overflowing .. one when draining residual water.

I protect the pipes from gravel invasion using rolled up shadecloth as a barrier.

What I do works fine!

But I would love to see an explicit diagram / sketch / photo of how you guys do it.

Many thanks

Johnnie

Let me look around. I seem to remember loads of photos of stand pipes around here when talking of auto siphons.

Johnnie,
Les has an excellent pic of all auto siphon components here.

The thread here shows a couple including how I have done it.
Here is one of the photos of the standpipe.


I actually use a polythene pipe to "riser" female under the GB instead fo the PVC elbow shown. I use 1/2" or 3/4" polythene as the drain pipe.