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  1. #141
    Extreme Koi Member Rank = Supreme Champion Frimley Koi keeper's Avatar
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    Quote Originally Posted by Tom Koi View Post
    Mark the depth of the joint into the fitting then 2/3"s below it apply a gentle heat all round pipe with a Blow lamp and slowly ease a slight bend into the pipe warm an area around 4"s long or longer or easier still glue an offset bend into the fitting, that'll give you a 45 degree angle though which maybe a to much?
    For me it was just a trial to see if I could make it work and then as it was very unsightly as I had it standing up in my pond I removed it and it's waiting to be used again some time in the future maybe?

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  3. #142
    Banned Rank = Mature Champion Trace's Avatar
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    Quote Originally Posted by Frimley Koi keeper View Post
    Power's finally back on so will see if I can add the photos now.

    Unfortunately the photos are all showing up on their side for some reason

    This was the first attempt using a drive tube length of 1m just to see if it would work.

    Attachment 24060

    Second attempt with drive tube cut down a bit.

    Attachment 24061

    Third attempt with drive tube cut down a bit more plus I added an end cap onto the top of the drive tube and altered the pipe work where hopefully any foam that is produced will come out. Just for the purpose of testing and proving the outlet was set up to empty back into the pond just in case it fired out water. At least the photo's the right way up this time - must only allow photos in landscape orientation not portrait

    Attachment 24062

    Fourth attempt just altered the foam outlet.

    Attachment 24063

    This is how the fourth attempt was set up. The inlet at the bottom was a 2" pipe with a pump cage on the end to stop any fish getting pulled into it.

    Attachment 24064

    Fifth attempt. Replaced the 2" inlet at the bottom and fitted a 4" pump cage to hopefully aid the flow into the air lift. Also the T on the horizontal pipe has been removed and an elbow has been fitted to the top of the drive tube. In the first attempt the pipe was 1030mm long between the top and bottom Ts.

    Attachment 24065

    Fifth attempt in situ.

    Attachment 24066

    BTW the photos really shorten the pond size as it looks like a builder's bucket in a couple of them

    I'm going to have another go at a longer drive tube now I have got the 4" pump cage on the inlet just to see what happens but even with the first couple of attempts it shows it is possible to have the water coming out quite a distance above the water surface even with a badly designed air lift. I did try to stick to Trace's original design but it's always worth having a tinker here and there to see what can be achieved and glad I went for flexi rubber boots and 2" pipe. Was just lucky with a few additional fittings that made the pump cage additions possible.

    The air stone is a modified 30mm x 130mm using 8mm air line fed from a 60 lph air pump (I think it's a 60 will check that later). At least I didn't knacker the air stone this time !!!

    The air line is probably about 4m long so that could be shortened in the final version but as I said earlier it was just a trial and error project to see if it would - work at all, give a steady flow, give a decent flow and also if it could lift any height above pond water level. So far I think it has done all of those not at the same time but maybe the next attempt will, hopefully.

    With the double elbows it was quite noisy and currently it's not producing any foam although the movement across the surface of the pond has cleared 90% of the foam you can see in the first 2 or 3 photos.
    Nice test setup Frimley ...

    Yes the only easy way to lift water higher is a longer drive tube ... you've done everything else about as well as you can do with stock easily available parts. You could also keep the air feed line as short as possible and reduce any restrictions in the air line inside bore to keep back pressure to a minimum but the main element is drive tube length.

    Air lifts are not a good choice for moving water any height above pond surface level unless you just need a trickle ... great for surface level returns though ...

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  5. #143
    Senior Member Rank = Jussai Tom Koi's Avatar
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    Quote Originally Posted by Trace View Post
    Nice test setup Frimley ...

    Yes the only easy way to lift water higher is a longer drive tube ... you've done everything else about as well as you can do with stock easily available parts. You could also keep the air feed line as short as possible and reduce any restrictions in the air line inside bore to keep back pressure to a minimum but the main element is drive tube length.

    Air lifts are not a good choice for moving water any height above pond surface level unless you just need a trickle ... great for surface level returns though ...
    Hi Trace, I get the top of the pipe bit [return] but do you simply drop a length of pipe with a bend and a piece of pipe in the end and drop it into somin like a water holding butt, then drop a weighted air stone to bottom of pipe, which then causes the water to rise.

    Thanks

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  7. #144
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    Good to hear from you again Trace, how have you been?

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  9. #145
    Banned Rank = Mature Champion Trace's Avatar
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    Quote Originally Posted by Tom Koi View Post
    Hi Trace, I get the top of the pipe bit [return] but do you simply drop a length of pipe with a bend and a piece of pipe in the end and drop it into somin like a water holding butt, then drop a weighted air stone to bottom of pipe, which then causes the water to rise.

    Thanks
    The best air lifts are the simplest ... the commercial designs that you see are made more complicated (pressure chambers etc.) simply to make them marketable.

    Yes ... dropping an airstone down a length of pipe with a 90o bend at the top at surface level is all there is to it ... there are a couple of other little refinements that can make the design more elegant but but yeah a length of straight, a bend, some tubing and an air stone are 95% of the way there.

    If you use standard 12mm OD 8mm ID tubing for the air line you will not have to weight the air stone.

    Drive pipe length is the most important element ... after that getting the most efficient air flow (least backpressure etc. in the air line etc.) is next. Having a bigger pump does not always mean better flow ... I've read in many places that the most efficient lifting and stirring of water is done by finer air bubbles and have witnessed that putting more air through the same size holes only makes the bubbles larger so it seems there is a sweet spot and a larger pump pushing more air does not mean a more efficient movement of water ...

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  11. #146
    Senior Member Rank = Supreme Champion freddyboy's Avatar
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    Quote Originally Posted by Trace View Post
    Nice test setup Frimley ...

    Yes the only easy way to lift water higher is a longer drive tube ... you've done everything else about as well as you can do with stock easily available parts. You could also keep the air feed line as short as possible and reduce any restrictions in the air line inside bore to keep back pressure to a minimum but the main element is drive tube length.

    Air lifts are not a good choice for moving water any height above pond surface level unless you just need a trickle ... great for surface level returns though ...
    Hi trace hooe your well

    Sent from my SM-G925F using Tapatalk

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  13. #147
    Banned Rank = Mature Champion Trace's Avatar
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    Quote Originally Posted by Frimley Koi keeper View Post
    Good to hear from you again Trace, how have you been?
    I'm doing ok thanks Frimley ... just been really busy for the last year or so ... still about now and again though ...

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  15. #148
    Banned Rank = Mature Champion Trace's Avatar
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    Quote Originally Posted by freddyboy View Post
    Hi trace hooe your well

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    I'm getting by ... thanks Freddy ... hope your well too ...

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  17. #149
    Senior Member Rank = Supreme Champion Ajm's Avatar
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    Frim did you get your airlift working in the end matey.

    Sent from my F5121 using Tapatalk
    Freddyboy the legend

    "we are water keepers first"

    Johnathan

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  19. #150
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    Quote Originally Posted by Ajm View Post
    Frim did you get your airlift working in the end matey.

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    Yes I did but only ran it for a few weeks just to prove it worked then took it out again as it didn't fit in with my plans.

    I'm not sure if the photos are still on here as I removed a few a little while ago when I ran out of space for new ones.

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  21. #151
    Senior Member Rank = Supreme Champion Ajm's Avatar
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    Quote Originally Posted by Frimley Koi keeper View Post
    Yes I did but only ran it for a few weeks just to prove it worked then took it out again as it didn't fit in with my plans.

    I'm not sure if the photos are still on here as I removed a few a little while ago when I ran out of space for new ones.
    Na can't see any. Am doing one this year. I know 110mm will be better but would 2x 40mm lifts still move a good amount of water?

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  23. #152
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    Quote Originally Posted by Ajm View Post
    Na can't see any. Am doing one this year. I know 110mm will be better but would 2x 40mm lifts still move a good amount of water?

    Sent from my F5121 using Tapatalk
    The attachments don't work so I must have removed the photos.

    Mine was only 2" and that shifted a fair bit of water considering the drive tube was very short. Think it needs to be about 1m long?

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  25. #153
    Senior Member Rank = Supreme Champion Ajm's Avatar
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    Was thinking about digging a water butt down in ground and using that as a res and drop the air lifts in so hight roughly around 1200mm

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    Freddyboy the legend

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  27. #154
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    Quote Originally Posted by Ajm View Post
    Was thinking about digging a water butt down in ground and using that as a res and drop the air lifts in so hight roughly around 1200mm

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    That would work if you can get enough water feeding the water butts possibly

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  29. #155
    Senior Member Rank = Supreme Champion Ajm's Avatar
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    Bd to multibay 110mm. Then moving bed in last bay it has 40mm tank connector didn't know if to widen to 110mm or add second 40mm to then to waterbutt with 2x40mm air lifts?? If that jibris makes sense

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  31. #156
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    Kind of.

    I initially went 40mm push fit then found it was difficult trying to find an air stone that would fit in it so went for 2" with rubber boot tees etc so it was easy to adjust.

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  33. #157
    Senior Member Rank = Supreme Champion Ajm's Avatar
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    Found what says 40mm air stone and worse case file the edges down a bit? But yeah rubber boots could be the trick like

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  35. #158
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    Quote Originally Posted by Ajm View Post
    Found what says 40mm air stone and worse case file the edges down a bit? But yeah rubber boots could be the trick like

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    That's what I thought about the air stone but still went 2" as I was dropping the airline and air stone down the top of the drive tube into the chamber at the bottom which means the air stone can be easily replaced if it gets blocked in the future.

    You will find you will probably need something smaller than a 40mm air stone if you go for 40mm pipe so it has more room to expel the air.

    Have you checked out the link to Trace's simple air lift thread? I think I put it on there?

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  37. #159
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    Quote Originally Posted by Frimley Koi keeper View Post
    That's what I thought about the air stone but still went 2" as I was dropping the airline and air stone down the top of the drive tube into the chamber at the bottom which means the air stone can be easily replaced if it gets blocked in the future.

    You will find you will probably need something smaller than a 40mm air stone if you go for 40mm pipe so it has more room to expel the air.

    Have you checked out the link to Trace's simple air lift thread? I think I put it on there?
    Haven't read it yet but I will be amazing knowledge that woman. Was thinking cutting slots in the bottom for water intake and feed the air line though there aswell cable tie airline on out side of pipe keep it tidy and thought I could get a tight fit for the stone or is that a bad thing if its tight

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  39. #160
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    Just had a quick look at the first few pages of this thread and there is a link on one of Trace's posts with the correct (at the time) link.

    There's some posts from Fred too bless him

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