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  1. #1

    Advice needed on teracota pipe under pond

    Does anyone know what this pipe would be for. I'm at the final depth of the dig and came across this teracota pipe it's about 3" diameter on the outside so thinking about 2" inside diameter. So guessing too small for any sort of water waste.
    The Mrs said there used to be a bomb shelter down at the bottom of the garden around where I'm digging. But I've not come across anything to prove that. And advice would be really greatfull and hopefully put my mind at rest. Because I've done all this digging. And almost ready for the concrete

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  2. #2
    So this has got me baffled so far it seems like 4 or 5 pieces in line but each piece I only 1' long and the joints are deffinetly not watertight.
    I'm wondering if they are ridge tiles ?? But why would they be in a straight line like that I'm going to dig under one of the carefully to see if it is actually pipe

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  3. #3
    I've just carefully took one of the pieces out because they ate not joined in any way. Just butted up to each other. And it's about half full of clay

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  5. #4
    Probably an old soak away.. I had similar on my house when I dug the footings for the conservatory. Panicked when I broke it then like you relazied it was full of crap and hadn't been doing anything for years. Mine was from the original 1930s roof drain that had been relocated when someone put a side extension on.

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  7. #5
    See if the angle draws a line to one of the corners of your house or out building..

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  9. #6
    I live in a typical council house which we have bought and we are one of the middle houses in a block of 4. The drain or whatever it is seems to run to the corner of next doors house

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  11. #7
    Well, my logic is, if its that full of muck it can't be doing much, if anything. Worst case is you'd have to run a new route for the neibours soakaway if that's what it was, but that said it's probably been draining into the soil along its length for some time with obviously no flooding issues. At least its not the sewer waste.. I also encountered that when digging my conservatory. Also made of clay. Luckily I didn't put my spade through that one or it would have been an expensive lesson!

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  13. #8
    Extreme Koi Member Rank = Adult Champion anne's Avatar
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    [QUOTE=colinley1979;333078] The drain or whatever it is seems to run to the corner of next doors house

    Ask them it it's theirs...……….and if they want it back...

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  15. #9
    Quote Originally Posted by colinley1979 View Post
    I've just carefully took one of the pieces out because they ate not joined in any way. Just butted up to each other. And it's about half full of clay

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    Definitely old land drain didn't joined them so water depressed slowly

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  17. #10
    Extreme Koi Member Rank = Supreme Champion john1's Avatar
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    Agree with above old land drain,as long as no water coming out carry on mate.
    John

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  19. #11
    Cheers guys that's put my mind at rest

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  21. #12
    Senior Member Rank = Grand Champion RoyLittle0's Avatar
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    It looks like the old pipe I pulled out of my front garden, not a standard soil pipe so I would agree with the others, it looks like an old land drain
    4600 Gallon Concrete Block and Fiberglass
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    Idealseal MS290

    My Pond Build

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  23. #13
    It's right at the level I will be pouring the concrete on. Do you think I should leave it and pour concrete over it. Or take it out because it looks like it hasn't been working properly for a while anyway. With all that clay in

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  25. #14
    Senior Member Rank = Grand Champion RoyLittle0's Avatar
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    For me it would be as simple as, if its in my way I would remove it, if it wasn't I would remove it, they don't use 3" any more so can only assume its redundant and not needed
    4600 Gallon Concrete Block and Fiberglass
    2100 mm x 710 mm Infinity Window 32mm thick glass
    2 x Aerated Bottom Drains and Skimmer
    Filtreau HiFlow 30 Drum Filter
    Bio Chamber - 140 litres K1
    Bakki Shower - 30 KG Sakura Far Infrared Media
    2 x 18,000 lh pumps
    Heated from house boiler through a heat exchanger
    Idealseal MS290

    My Pond Build

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  27. #15
    Senior Member Rank = Kyusai hippo's Avatar
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    As said before , its an old land drain - just concrete over it and you`ll be fine .

    I found one on my build - but it was at mid-depth right through the middle of the pond and had water coming out of it , so I decided to re-route it to be on the safe side
    Colin

    2500 Gallon Fibreglass Pond
    Draco Solum 16 , 400l Bio Chamber

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  29. #16
    Personally id say re-route it, it may be an old land drain or possibly from the rainwater gully, it looks full of sediment but that doesn't mean its redundant, many soakaways are now clogged with sediment and need digging out as does the pipework, the last thing you want is to have an issue in the winter and costly work routing around your pond in situ.

    Have you tried tested the rainwater goods with a hose pipe and see if you get any sign of water ?

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  31. #17
    Senior Member Rank = Jussai Spongebob's Avatar
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    100% just an old field land drain. Very common. No doubt you’re on clay hence it being there. Anything of significance will be a darker colour, larger diameter and will have sealed collars.

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  33. #18
    I dug up the same pipes a few days ago and started to panic. After some more digging (on the Internet) I discovered what others have said - old field drains so panic over. I am going to fill the ends with expanding foam just in case they still carry water during heavy rain.


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  35. #19
    Found exactly the same whilst digging for a concrete collar some 30ft away from the house and a further 14ft away in the opposite corner of the trench approximately 9” underground. All dry and full of clay and tree roots with some broken. All of these were just butted upto the next one.

    No doubt will find more on Saturday when the mini-digger arrives to dig down inside the collar that has been concreted already.

    I looked at the direction of the pipe for any signs of a soak away underneath a down pipe and they don’t line up at all. I’ve had an extension a few years ago and a new soak away put in at the opposite end of the garden. Settled on it being an old redundant land drain due to the clay soil.



    Last edited by Hiyabanana; 04-06-2020 at 07:19 PM.

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  37. #20
    Senior Member Rank = Jussai Spongebob's Avatar
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    I used to lay these on my first job back in the late seventies, shortly after they changed to the yellow plastic corrugated. Pretty much all the land our houses are on we’re farmers fields at one point, and when on clay those fields would be useless, hence the land drains. I’ve already found both types on my dig! Pretty much all clay land will have them in rows a few yards apart.

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