carlyai 1,177 Posted January 17 Share Posted January 17 I'm putting an aquaponics sump tank in the ground. I was going to build a concrete structure in the ground and drop in a 1000 L IBC TOT container. I have since been thinking of sourcing a ready made good grade tank, digging the hole, and putting that in the ground for the sump tank. I saw the tank in the picture at Global House and thought that could be OK, but staff said it's for above ground, not in ground. The tank manufacturer has not responded to email. So the question is, why can't I put this tank in the ground? It looks strong enough. 1 Link to post Share on other sites
Popular Post lopburi3 10,101 Posted January 17 Popular Post Share Posted January 17 Tanks float. Not good when contained water runs low and ground water is high. 3 Link to post Share on other sites
Artisi 16,080 Posted January 17 Share Posted January 17 1 minute ago, lopburi3 said: Tanks float. Not good when contained water runs low and ground water is high. That's correct, in some cases. Change to septic tank and ask Global experts that question Link to post Share on other sites
colinneil 76,156 Posted January 17 Share Posted January 17 Carlyai, crazy idea even thinking of putting a tank like that in the ground, unless they have at least 60% water in them they pop up out of the ground. 1 Link to post Share on other sites
carlyai 1,177 Posted January 17 Author Share Posted January 17 12 minutes ago, Artisi said: That's correct, in some cases. Change to septic tank and ask Global experts that question I was thinking about a septic tank and pulling the gizzards out of it. The tank would always be near full as it's a sump tank for an aquaponic system. 1 Link to post Share on other sites
Crossy 27,950 Posted January 17 Share Posted January 17 How much water will there be in the tank under normal circumstances? I would certainly look at adapting a septic tank as these are at least intended to be buried, but they could still pop-up if empty and ground water high. 1 Link to post Share on other sites
carlyai 1,177 Posted January 17 Author Share Posted January 17 1 minute ago, Crossy said: How much water will there be in the tank under normal circumstances? I would certainly look at adapting a septic tank as these are at least intended to be buried, but they could still pop-up if empty and ground water high. Normally it would be full all the time. No ground water that I noticed when I built the pool which has a 2 m deep end and dug down another 400 mm for base cement. Link to post Share on other sites
Crossy 27,950 Posted January 17 Share Posted January 17 A septic, installed as per the instructions on a concrete foundation (anchor weight) would likely do the trick without the danger of crushing from ground pressure or popping out. As usual, no warranty is implied or inferred, YMMV. Link to post Share on other sites
jojothai 523 Posted January 17 Share Posted January 17 If they say it is for above ground then it will not be designed for in the ground. In the ground generates a very large ground stress. I had a strong septic tank fail after a few years and that was designed for in the ground, but not the strongest version. I got replacement under warranty and paid extra for a stronger version that has a lot more ribs. It does not look strong to me. there are no thick strengthening ribs. It will fail. As noted, buy a good grade septic tank circular/oval (its stronger) and take the gizzards out. As others have pointed out, there is the danger of floating up when empty. Depends on whether there is a ground water table . You can check what the water level is in the ground, but It may be low now, in dry season. Could get high in the rainy season. If there is a high water table now then its likely all the time and you have to keep the tank mostly full after installation. 1 Link to post Share on other sites
jojothai 523 Posted January 17 Share Posted January 17 15 minutes ago, carlyai said: Normally it would be full all the time. No ground water that I noticed when I built the pool which has a 2 m deep end and dug down another 400 mm for base cement. What time of year were you building the pool? Link to post Share on other sites
Popular Post carlyai 1,177 Posted January 17 Author Popular Post Share Posted January 17 33 minutes ago, jojothai said: What time of year were you building the pool? All year. This is Isaan mate...we move slowly around here. 5 Link to post Share on other sites
carlyai 1,177 Posted January 17 Author Share Posted January 17 50 minutes ago, Crossy said: A septic, installed as per the instructions on a concrete foundation (anchor weight) would likely do the trick without the danger of crushing from ground pressure or popping out. As usual, no warranty is implied or inferred, YMMV. Maybe stick to the initial proposal of putting my IBC TOT in the ground. The local mob know how the build the concrete and reo.construction as they built it for the pool. Plagerised pic. from TV contributed. 1 Link to post Share on other sites
tweedledee2 614 Posted January 18 Share Posted January 18 There are "above ground", "on ground" and "ground" tanks. The OP's picture is a ground tank. Ground tanks are made of reinforced material that can withstand soil compression. Here are link's to Global's and D-Tank's web pages. https://www.globalhouse.co.th/product/detail/28024442500 https://www.piboonbunsab.com/product/183/ถังเก็บน้ำ-pp-ดีแท้งค์-d-tank 1 Link to post Share on other sites
sometimewoodworker 3,145 Posted January 19 Share Posted January 19 (edited) 5 hours ago, tweedledee2 said: There are "above ground", "on ground" and "ground" tanks. The OP's picture is a ground tank. Ground tanks are made of reinforced material that can withstand soil compression. Here are link's to Global's and D-Tank's web pages. https://www.globalhouse.co.th/product/detail/28024442500 https://www.piboonbunsab.com/product/183/ถังเก็บน้ำ-pp-ดีแท้งค์-d-tank Sorry that’s only partly correct. Tank illustrated is for on ground not in ground use. That brand’s in ground/underground tanks are these No plastic or fibreglass tanks for in ground use have flat tops like the D-Tank above. FWIW We have 3 of the other style under my paint room. Also neither of your links are the makers, they are made by Indra Wutsadu (1997) Co Ltd Both are suppliers of many kinds of tank. Edited January 19 by sometimewoodworker 1 Link to post Share on other sites
Popular Post sometimewoodworker 3,145 Posted January 19 Popular Post Share Posted January 19 (edited) On 1/17/2021 at 2:27 PM, Crossy said: A septic, installed as per the instructions on a concrete foundation (anchor weight) would likely do the trick without the danger of crushing from ground pressure or popping out. As usual, no warranty is implied or inferred, YMMV. While you can certainly use a septic tank like that, it would be better to use a water tank designed for installing in the same way don’t you think? It would probably make it a bit easier, no? These are all available with a few more sizes than septic tanks as well. These are all available in Thailand Edited January 19 by sometimewoodworker 3 Link to post Share on other sites
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