Simply Koi and More Koi

Hi David - Depending where you are in London I can probably get some 3" to you this week and svae a bit of your time. How much do you need? A metre? Will also check with the pumbing shop for 3" to 2" reducer. Whats the first three digits of your postcode?

Hi TicToc,

I am in E17. With the set up of the pump it looks like the outlet of the pump can only be extended with a either a 2" reducer or a 3" extender (the only option if you want to use 3" pipe!). Yes 1 m would be more that sufficient. It would be too much to hope that you have all that kicking around.

Sorry I was knackered last night so didn't do too much with the pump apart from sticking it in the filter and run it as it is to see the output. Judging by the bare eye I don't think there was 20,000 litres coming our of it.

BTW First impression of the pump is that of a cheap pump made in China, which it is!

David.

David,

No probs. My first Source offered up a book for ordering the bitsclast night . No worries, I'm now carefully grooming the second source......

is the 3" piping purely for my earlier comment? If it was forget it. Scott and a few others have convinced me 2" outlet is sufficient if for others I will keep at it.
Tickers

The guy at the South East show was insistent that you needed to use the correct sized pipe to get the output, so 3" or 4" depending on the pump size. Be interesting to see the 2" and 3" outputs to compare

Understood and thanks for explan Bob.

David have sent you a PM. Can I have your home address for delivery please. Have spoken with a good friend and will hopefully have 3" + 90 degree and fingers crossed the 3"/2"reducers /enhancers to forward onto you Thursday.

Thanks
TicToc

Hi all,

thanks to TicToc effort I managed to get a bit of 3" pipe and a few bits so I managed to do a bit of experimenting today. Here are my findings.

Test gallons/hour litres/hour
2"@ 0.3m head ( 2400.0 10800.0
2"@ 1m head 1542.9 6942.9
3"@ 1m head 1963.6 8836.4

Almost 2,000 gallons an hour with 3" pipe @1m head for 150W is not too bad in my opinion. Must admit my testing method was a bit rustic, but it serves a guideline to what you can expect.

There is no way I can get a 3" pipe over the wall of my pond with out destroying the things so I will be going with a 2" outlet over the wall.

David.

Thanks for the experimenting David. I've got to work out what to go for now this weekend. Might wait to chat to the guys at Cuttlebrook this weekend!!!

Thanks for the results David

2000 gallons @ 1-metre head for 150watts is pretty good

Currently I use an Aquamax 15000 for 215 watts (or is it 250 watts?) and get roughly the same amount

Not as much as first thought though, the lid on the box suggests 20000 litres of course, even at 0.3 metres (1-foot) you're only getting 10000 litres.

Saw a HP-20000 litre pump go for £71 this week, so all in all could be a good buy.

Pumps not being my specialist subject ! can any of you tell me ,will this or any pumps performance deteriorate over a period of time,if so by how much over how long ?

Mike.

Everything wears out eventually Mike. In practice the performance of a pump should stay the same until such time as important parts start to become seriously worn out. If you were pumping water mixed with small rocks of sand you might expect the impeller or shaft to degrade but in the case of a koi pond this seems unlikely to me. So I would expect a pump to preform at a more or less steady rate right up to the point where the brushes, bearings start to wear out. Once things reach that point the life expectancy would go downhill fast.

B.Scott

ok, call me stupid but has anyone thought of using the rectangular box section pipework that is used for cooker-hood and extractors for going over the wall. you get round to rectangular convertors as well. this would give a lower profile of a small pipe but keep the area of a big pipe.
do you know what i mean???
turn this on its side

[img]http://www.wickes.co.uk/content/ebiz/wickes ... medium.jpg[/img]

It's a good idea Jane. The only down side I see is the thickness of the flat pipes and solvent welding them without leakage.

B.Scott

vippymini wrote:[img]http://www.wickes.co.uk/content/ebiz/wickes ... medium.jpg[/img]

That flat surface of the bend will really slow the flow down as the water hits it.

Remember the the tighter the curve the slower the flow, just like a car going around a corner - tight corners = slow & wide flowing corners = less slowing down.

Jane,

That's is not so stupid, as I was thinking of something similar. But I would like it to be face on to the pipe rather than the rather sharp bend.

Bob,

BTW the 2" @0.3 m was done through a 6' pipe run 9limitation of my filter set up!) and a really terrible 3" to 2" reducer. So it was straight over the wall even keeping that terrible reducer I would think the figures would be slightly better. I would love to be able to use that 3" with something silimar to what Jane has suggested.

David.

David,

Useful information on performance, thank you.
One question I have is on noise.

How intrusive is the noise, and how loud?

Cheers

Gordon

David,

Where was the pump put to test it, just in the end of a filter or pond?