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Thread: New extension

  1. #1
    Senior Member Rank = Kyusai Spongebob's Avatar
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    New extension

    So after mulling it over for many moons the digger arrived today. After considering how to extend a round pond, itís not really possible, so hereís the plan! Will stay formal, ie (round) and (square). Iím still thinking re a window, but will likely add one.

    I get the best of both worlds then as 2 will be next to main patio, so can sit and look down on it, then go down steps to window and pond at waist height. But see below Iíll still have 1 also as thatís viewable from the orangery in the house.

    Pond 2 is underway, approx 4.0 x 3.5 x 1.5 metres. Needed to temporarily resite the heat pump with a captain bodgejob.

    Pond 2 ( or is it still pond 1?) to go the other side of the steps to the existing one. And the best bit an underground tunnel (6 metres long) between the two (400 mm pressure pipe) this Should give me 6-7000 gallons plus (a few hundred in the pipe). Still need to work out all the logistics of the returns and will need to add a new drum at some point, with a momotaro Bakki to go on new section.

    best bit is of course I can build section 2 independently of 1, meaning I only need to knock through into 1 as the last job ( Iíll work that 400 mm hole out later!) Good progress today, so easy with a mini digger, and the spoil disposed of on site. Couple of good days to come so hopefully big progress









    9000 ltr, FG, BD, Nexus 220, Draco drop in, Remora i9 ASHP, Econbead 50, Roto Innovations shower

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  3. #2
    Senior Member Rank = Supreme Champion Ajm's Avatar
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    Mint can't wait will definitely be watching this one . Love the tunnel better in walkable glass tho lol haha

    Sent from my SM-G973F using Tapatalk
    Freddyboy the legend

    "we are water keepers first"

    Johnathan

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  5. #3
    Senior Member Rank = Kyusai Spongebob's Avatar
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    Quote Originally Posted by Ajm View Post
    Mint can't wait will definitely be watching this one . Love the tunnel better in walkable glass tho lol haha

    Sent from my SM-G973F using Tapatalk
    hehe I’ve looked at clear pipe, but would need a mortgage for anything the right size, a raised clear pipe would of been so cool . I just hope 400 mm is big enough if two big girls decide to go for a night out at the same time !
    9000 ltr, FG, BD, Nexus 220, Draco drop in, Remora i9 ASHP, Econbead 50, Roto Innovations shower

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    Senior Member Rank = Supreme Champion Ajm's Avatar
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    Will you have a return pointing down the tunnel to help with crap ect ? Be a bugger if they do get stuck lol

    Sent from my SM-G973F using Tapatalk
    Freddyboy the legend

    "we are water keepers first"

    Johnathan

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    Senior Member Rank = Kyusai Spongebob's Avatar
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    Quote Originally Posted by Ajm View Post
    Will you have a return pointing down the tunnel to help with crap ect ? Be a bugger if they do get stuck lol

    Sent from my SM-G973F using Tapatalk
    yep I’m planning one each end so I can keep a good flow in either direction ��
    9000 ltr, FG, BD, Nexus 220, Draco drop in, Remora i9 ASHP, Econbead 50, Roto Innovations shower

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    Senior Member Rank = Grand Champion davethefish1's Avatar
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    sounds an awesome plan!
    with a 6 meter tunnel!

    you might need to get the channel tunnel guys in


    it might be worth a message to that guy on youtube,
    who showed that pond linked together with a tunnel to his conservatory for some pointers...


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    Senior Member Rank = Supreme Champion Ajm's Avatar
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    Quote Originally Posted by davethefish1 View Post
    sounds an awesome plan!
    with a 6 meter tunnel!

    you might need to get the channel tunnel guys in


    it might be worth a message to that guy on youtube,
    who showed that pond linked together with a tunnel to his conservatory for some pointers...

    Mint

    Sent from my SM-G973F using Tapatalk
    Freddyboy the legend

    "we are water keepers first"

    Johnathan

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    Extreme Koi Member Rank = Supreme Champion john1's Avatar
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    Be watching this one Bob so much easier with a digger.
    John

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  17. #9
    Senior Member Rank = Kyusai Spongebob's Avatar
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    Quite a good day until I broke the digger :-(










    9000 ltr, FG, BD, Nexus 220, Draco drop in, Remora i9 ASHP, Econbead 50, Roto Innovations shower

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    Senior Member Rank = Mature Champion smartin's Avatar
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    Nice, will be watching this build
    2200 gallons, infinity window, BD
    Evolve 4000 combi amalgam UV
    10k,20k AF pumps
    Skimmer trickle.

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    Senior Member Rank = Jussai Twhitenosugar's Avatar
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    Me too!

    Love the idea of a tunnel.

    Hope you managed to get the digger fixed.

    Sent from my Pixel 4a (5G) using Tapatalk
    13,000L fibreglassed raised pond with window

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    Extreme Koi Member Rank = Jussai NickK-UK's Avatar
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    How are you coping with the thermal expansion/contraction of materials?

    The thermal expansion coefficient of PVC-U at 0.07 to 0.08 mm/m K
    Not so bad if buried as it will reduce the difference in temps and a steady state water temperature.

    10degC = 10 * 0.08mm/m, so for a 10 meter pipe that would be 10*10*0.08 0r 8mm of expansion or contraction or another way: 1cm.

    Gravel in the ditch around the pipe will allow it to move. However you will have a temperature change between fitting in these temps and once the water is in and warmed up.. that could be 10degC or more.. hence the concern.

    Also how do you ensure you have a flow of oxygenated water through the pipe? Is there a circuit that goes between the ponds?

    The bottom pond could have an airlift back to the top pond. Power efficient and oxygenation for free.
    1700 litres on 50 watts
    Eco Pond 2.0: 13,000 litres, 58W airlifts, 1300l anoxic, Solum 16. No pump.

  23. #13
    Senior Member Rank = Kyusai Spongebob's Avatar
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    Quote Originally Posted by smartin View Post
    Nice, will be watching this build
    Ive just got the digger back up the slope (Just!) Another on the way
    9000 ltr, FG, BD, Nexus 220, Draco drop in, Remora i9 ASHP, Econbead 50, Roto Innovations shower

  24. #14
    Senior Member Rank = Kyusai Spongebob's Avatar
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    Quote Originally Posted by NickK-UK View Post
    How are you coping with the thermal expansion/contraction of materials?



    Not so bad if buried as it will reduce the difference in temps and a steady state water temperature.

    10degC = 10 * 0.08mm/m, so for a 10 meter pipe that would be 10*10*0.08 0r 8mm of expansion or contraction or another way: 1cm.

    Gravel in the ditch around the pipe will allow it to move. However you will have a temperature change between fitting in these temps and once the water is in and warmed up.. that could be 10degC or more.. hence the concern.

    Also how do you ensure you have a flow of oxygenated water through the pipe? Is there a circuit that goes between the ponds?

    The bottom pond could have an airlift back to the top pond. Power efficient and oxygenation for free.
    Lol my head hurts, not sure how it will differ from say a normal bottom drain? It will be buried, and always heated with a constant temp, wont be going in until April. Im presuming as with a bottom drain, it can be fibreglassed into Re the flow Ill channel the returns to push through from either end, pond 1 and 2 have bottom drains and each will have 3 separate returns.
    9000 ltr, FG, BD, Nexus 220, Draco drop in, Remora i9 ASHP, Econbead 50, Roto Innovations shower

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  26. #15
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    Quote Originally Posted by Spongebob View Post
    Lol my head hurts, not sure how it will differ from say a normal bottom drain? It will be buried, and always heated with a constant temp, wont be going in until April. Im presuming as with a bottom drain, it can be fibreglassed into Re the flow Ill channel the returns to push through from either end, pond 1 and 2 have bottom drains and each will have 3 separate returns.
    Just saying that the pipes will expand and contract a bit.. so make sure the connection is a good one or it may start leaking. Sounds rude but will the pipe joints be flanged? That would add additional strength to the joint.

    Looking forward to a GoPro on the fish as it goes through the tunnel

    I have 160mm PVC-U sections on the airlifts, but 400mm is going to be big and heavy!
    1700 litres on 50 watts
    Eco Pond 2.0: 13,000 litres, 58W airlifts, 1300l anoxic, Solum 16. No pump.

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    Senior Member Rank = Kyusai Spongebob's Avatar
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    So tough couple of days, bogged down in hideous wet clay. Was only intending on 4.5 feet, but will have to go to 7 to get firm ground. Patio wall only just held out, thought I was going in the hole at one point







    local restaurants wilmington nc
    9000 ltr, FG, BD, Nexus 220, Draco drop in, Remora i9 ASHP, Econbead 50, Roto Innovations shower

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  30. #17
    Senior Member Rank = Grand Champion davethefish1's Avatar
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    Quote Originally Posted by Spongebob View Post
    So tough couple of days, bogged down in hideous wet clay. Was only intending on 4.5 feet, but will have to go to 7 to get firm ground. Patio wall only just held out, thought I was going in the hole at one point
    great progress
    you're really grafting!
    and getting a lot done in a short time.

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    Senior Member Rank = Mature Champion smartin's Avatar
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    mmmm mind that wall Spongebob, nothing holding it back is there now with all the soil removed? be careful especially if you get lots of rain.... can you not support the wall by driving in some scaffold tubes or something with some wooden planks between tubes and the wall?? use the bobcat to sink the tubes from above ?
    2200 gallons, infinity window, BD
    Evolve 4000 combi amalgam UV
    10k,20k AF pumps
    Skimmer trickle.

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  34. #19
    Senior Member Rank = Kyusai Spongebob's Avatar
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    Quote Originally Posted by smartin View Post
    mmmm mind that wall Spongebob, nothing holding it back is there now with all the soil removed? be careful especially if you get lots of rain.... can you not support the wall by driving in some scaffold tubes or something with some wooden planks between tubes and the wall?? use the bobcat to sink the tubes from above ?
    it’s not ideal, however the plan is to take it down as I go using the bricks elsewhere, hopefully it will stay up Not a good day today, just seemed to have moved piles of sticky clay from one place to another! Got it reasonably tidy and thought I’ll just dig the trench for the bottom drain pipe work, easy enough with small bucket, but suddenly another massive pile of wet b*****d clay! And it’s so sticky having to constantly scrape the bucket out.

    Weather is good but I have so much groundwater from redundant land drains (not helped by chopping through what looks like the storm drain at the back of house (oops sort of forget it was there) That’s another job to repair that! To cap it all I have friggin covid lol. Was hoping to concrete Tuesday, looks like that’s out the window, really worried now going to miss this good weather, if it turns I’m screwed.

    Hopefully it will all be worth it in the end

    Whats everyone’s thoughts on this? Might just tie into the round pond?

    Last edited by Spongebob; 16-01-2022 at 10:38 PM.
    9000 ltr, FG, BD, Nexus 220, Draco drop in, Remora i9 ASHP, Econbead 50, Roto Innovations shower

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    Senior Member Rank = Mature Champion samp09's Avatar
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    Hope you feel better soon and the weather holds out for you!

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