Could you explain to the forum what neutral to positive buoyancy is please.
Garfield.
Positive buoyancy would be items that float on top of the water and Neutral would be items that are suspended in the water.
I'm not sure how you'd accomplish this without your settling tank being deeper than your BD's, which I think is pretty
rare unless your pond is pretty shallow.
I think stand pipe use is pretty rare nowadays, at least in the States. Good valves makes it too easy and worth the
cost imo.
I think the benefit of the stand-pipe cleanout can be handled by having that same fitting right at the inlet to the RDF or settling tanks with a plug on it. Pretty sure I saw that as a recommended setup where a cleaning brush and/or hose can then be pushed the full length of the BD pipes.
Author of Midlana, Build this High Performance Mid-engine Sports Car. http://midlana.com/stuff/book
Sorry, I did not make things very clear regarding the BD horizontal pipe gradient.
Your pond is 6 feet deep .
Your settlement tank is 4 feet deep
The bottom drain pipes would normally run horizontal. Why. Because most pictures of the bottom pipe installations on koi ponds installations always look like they are
horizontal.
Instead of horizontal
You change the horizontal pipe fall to go DOWN, so you can give your plumbing a 1 in 40 down gradient, down to the ELBOW WAY below the settlement tank before it risers into the
bottom of the settlement tank, to be finished with a plain 4'' socket.
If you look at the plumbing on the outside of a building, the sewer pipes run down to the main vertical waste pipe.This allows the waste to be taken away by the flush
water and gravity.
Bottom drain pipe, same thing, gravity and water velocity carry dirt to lowest point before it is drawn up into the settlement tank.
This is were the long stand pipes come in.
Pump the water out of the settlement tank. It is now empty. Lift the one stand pipe and the water rushes in carrying the heavy sand and dirt to be flushed away by opening the
flush valve.
Garfield.
Last edited by coolwon; 02-20-2017 at 06:36 AM.
SMOKE & MIRRORS
It's a settlement chamber.
It ties up the BD return lines to keep them more or less equal in length and catches the surface floaters. The heavy stuff.
The finer stuff does get through TO the sieves, strainers, brushes, sand filters,rotary drum filter, even a paper filter if that floats your boat.
As the owner builder is piping up now he is going directly to the pump with the surface skimmer. Result mushed up whatever, sent straight back into the pond,
Result, never ending suspension or cloudiness.
The vortex or drum or whatever is his first round thing with the two bottom drains connected.
Rubbish straight into the filter bed
Garfield
Last edited by coolwon; 02-18-2017 at 01:17 PM.
I do admit that the concrete collar does make everything much more stable!
Trying to work out what a filter pit is?
A pit sounds like an enclosure. Probable below ground and the top level with the surrounding ground level.
Maybe a coal pit.
Maybe a suitable enclosure to terminate pond pipes.
A settlement tank with no filters maybe!
Can't be neutral to positive buoyancy.
Those system's don't work, Peter Waddington found that out years ago.
I must be very fortunate, mine works very very well as far I can see by the sh1t I have pumped out of it for the last +- 20 years.
Ah well you win some you lose some I suppose that's koi keeping.
Garfield
Last edited by coolwon; 02-19-2017 at 08:54 AM.
Heres my progress so far. By removing all the stones, putting in the concrete collar and now putting back the stone, I'm actually piecing both water falls together a lot better then before.
Skimmer is working a lot better now that it is tied directly to the pump inlet.
I know a lot of you guys have different philosophies on your koi pond builds. I came from a roughly 2000 gallon pond. One 1200 gph sub pump going directly to a pressurized uv bio/mech filter then to my waterfall while my skimmer had another 1200 gph sub pump inside pushing the water directly to the same waterfall. Once the koi pond balanced out, my water was clear to the bottom. A slight hint of green but nothing unusually.
My main question today is this. Anyone running 3" bottom drains ever had the drains clog up under normal use? Koi waste, possible yard debris?
Thank you!
You're completely right... lots of philosophies and designs but you're the only one who gets to decide because it's yours.
If you browse through mine or any of the other "build" threads you'll see how many suggestions you'll get... it's all part of posting on
a forum. No one's wrong or right, but each gives there heart felt opinions on how you should proceed which all are valid. Only you get
to decide how you go with yours.
https://www.koiphen.com/forums/showth...2-s-Pond-Build
Glad things are going well... looks great imo.
Something I did on mine was mortar all the rocks underwater around the perimeter to try and keep debris from collecting in the spaces... just
something to think about in the future if it becomes an issue.
Imo yours is looking great!
On a positive note, here is where my koi have been staying during the koi pond build. Water is crystal clear!
Good looking and great job ...
Can not answer you since both of my bd is 4" ... but it also depend on what we allow to flow / settle and it tie up to the sieve flow rate / pump.
http://www.calctool.org/CALC/eng/civil/hazen-williams_g to calculate how much gravity flow change on your pipe design.
The key is normal use. Like Catfish said originally the two sections tied together will only flow as much as a single 3" pipe, so your
flow in those sections (BD to wye) are going to be the weak link and potential to clog imo.
The thing about many of the vortex style containers too is the outlet to the pump isn't adjustable for draw down so depending on how
many inches below water level, that's the max you're able to flow... and if it's only a few inches, I think you'll still have trouble gravity
flowing enough through that single 3" pipe to feed that pump. If not, again like Catfish said, a suction style system maybe your only option
without redoing the BD's.