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Retro Portable Bottom Drains

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Retro Portable Bottom Drains

Post by Admin on Thu Aug 25, 2011 6:17 pm

Personally I`m happy with mine .... I`t is a nuisance though due to it not staying primed when the `Air` is switched on or if I move it accidentally Mad



Hence the `Sequence` Pump having to be sited on the ground.... Rolling Eyes

RBD to ball valve to Sequence (covered by black box) Rolling Eyes




Your thoughts .... I know DaveB hated his but Lau likes his RPBD.

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Re: Retro Portable Bottom Drains

Post by DaveB on Fri Aug 26, 2011 4:48 pm

Hi Mio

I bought one a while back when I thought of having a second bottom drain as I was having problems with rubbish collecting in one area of the pond floor. After fitting the covers for winter and after a while, no more air bubbles. I therefore had to remove the covers , lift the bottom drain out of the pond and clean the surface of the rubber. For some reasom it was covered in a strange subsance which I can only describe as being a combination of scale/bacteria biofilm which was duely cleaned off with high pressure hose.Unfortunaely within 2 weeks the air flow was once again significantly reduced. Same procedure as before, but this time, I even removed the rubber and sealed it back into place to see if there was something underneath, nowt was found .Incidently even stranger, I have another spindrifter which looks to have the same neoprene rubber and have never had any Bother in 4 years.

Just out of interest you guys may wish/or not wish to know that I solved the problem of keeping the pond floor clean by having a low tangential return( taking the pump return to the bottom and pointing towards the drain.) saved running another pump too.

Best REgards Dave
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Re: Retro Portable Bottom Drains

Post by Admin on Fri Aug 26, 2011 5:28 pm

My RPBD also acquired a liberal `Calcified` Bio-Film coating readily Dave Rolling Eyes

I was pushing 50 lpm air through it which lifted it off the bottom and killed the priming Twisted Evil I instead run two disks either side of it now Twisted Evil

I would like to run the UV separately at a lower flow which could return on the bottom like the previous UV did.

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Re: Retro Portable Bottom Drains

Post by DaveB on Fri Aug 26, 2011 6:26 pm

Mio A few people have complained that such low returns cause clloudyess of water. Personally I have not experienced this but then I do have a bubblebead filter which does very well at polishing the water. I beleive also the added benifit of low return is thet I also have the heat exchanger on the same system and beleive it is more economical to return the heat away from the surface. Unfortunately this does incourage the koi to hang at the bottom next to the return in the winter and worry about developng underbelly ulcers. I am toying with the idea of raising the low level return a couple of feet off the bottom so will still get some water current moving in the right direction and koi staying off the bottom

Best REgards Dave
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Re: Retro Portable Bottom Drains

Post by Admin on Fri Aug 26, 2011 6:50 pm

Koi Metabolism will as you know dictate how active Koi are at low temps Dave ie whether Moribund (on the bottom) etc .

I dropped a 500 watt Titanium heater through a hole in the centre of the Solar Cover last Winter when temps plummeted to 3C and was amused to see them all huddled around it whilst temps increased....

It raised 900 gallons water from 3C to 17C in two weeks Very Happy whilst ambient air dipped below an Arctic-style -9C

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Re: Retro Portable Bottom Drains

Post by DaveB on Fri Aug 26, 2011 7:10 pm

Mio

I could always tell when the boiler was on by where the koi would hang.We have really had a couple of bad winters especially the last one. Do the stars predict anything about what sort of winter we will get this year. Best Regards Dave

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Re: Retro Portable Bottom Drains

Post by Admin on Fri Aug 26, 2011 7:58 pm

DaveB wrote:Mio

I could always tell when the boiler was on by where the koi would hang.We have really had a couple of bad winters especially the last one. Do the stars predict anything about what sort of winter we will get this year. Best Regards Dave

They do Dave Wink

Astro-Meterologist here Arrow http://ukweatherbrief.wordpress.com/

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Re: Retro Portable Bottom Drains

Post by Admin on Fri Sep 16, 2011 6:59 pm

Admin wrote:Personally I`m happy with mine .... I`t is a nuisance though due to it not staying primed when the `Air` is switched on or if I move it accidentally Mad



Hence the `Sequence` Pump having to be sited on the ground.... Rolling Eyes

RBD to ball valve to Sequence (covered by black box) Rolling Eyes




Your thoughts .... I know DaveB hated his but Lau likes his RPBD.

This RPBD arrived with a 90 degree bend I could not deploy for obvious reasons ?

http://www.koidirect.net/aquosis-portable-retro-bottom-drain-prod-1094.html#googlebase

Would a 45 elbow clear the 30 inch vat height to an external pump Guys ? do keep in mind my DIY DID affliction when replying please Embarassed Plumbing is one of my Achilles Rolling Eyes

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