pond and stream

ponddigger · Posted: Sun Oct 10, 2010 9:58 pm Post subject: pond and stream

hi photo of pond and stream 2 years on

kindredspirit · Posted: Mon Oct 11, 2010 6:08 am Post subject:

What wattage is that pump to produce that water flow?

I had a waterfall but discontinued it because the flow was too small.

Installing a far bigger pump would have cost too much in electricity I thought.

ponddigger · Posted: Mon Oct 11, 2010 9:46 am Post subject: pond and stream

hi, the name of the pump is pedrollo,all tec information on their website.it cost me about 50 cent for 12 hours to run the waterfall. the stream is 2 ft wide app by 15 ft long app.the pump is working over 2 years yours ponddigger

vulkan · Rank attained: Rowan Tree Joined: 16 Nov 2009 Posts: 135

exactly which model of pump is it?

ponddigger · Posted: Mon Oct 11, 2010 5:12 pm Post subject: pond and stream

photo of pump, cost about 180 euros

kindredspirit · Posted: Mon Oct 11, 2010 5:52 pm Post subject:

Looked it up.

http://www.pedrollo.co.uk/pdf/Product%20Pages/Submersible/TOP/TOP.pdf

Couldn't find the wattage on their site but I understand that those type of pumps are savage on electricity. I stand to be corrected ,however. They're not really designed for continuous use but they're brilliant for such jobs as draining footings etc.

vulkan · Rank attained: Rowan Tree Joined: 16 Nov 2009 Posts: 135

Here are some facts and figures

Pump name_____________Watts_________ Cost______Flow at 1m (LPM)

Pedrollo top 2____________480__________295 Euros_____220

Oase 12000 eco__________130__________336 Euros_____160

Information from suppliers websites

Pedrollo

Pedrollo cost

Oase info

In conclusion:

Although the Oase costs 41 euros more it uses just over 3.5 times LESS electricity than the Pedrollo.

Or to put it another way: For every day you run the Pedrollo, you can run the Oase for 3 days for the same cost.

The Oase

Contains no oil
Is designed to run filters and waterfalls
Runs 24 /7 no problem

The Pedrollo

Is full of oil
Designed to empty sumps
Not designed to run 24/7

The Pedrollo is a typical sump pump. Its good for its intended use, but uses a lot of electricity to do it, which makes it not suitable for a waterfall.

I have to agree with kindredspirit

ponddigger · Posted: Mon Oct 11, 2010 9:24 pm Post subject: pond and stream

hi, thanks for all the info, i can still buy the pumps for 180 euros,from my local co op. yours ponddigger

vulkan · Rank attained: Rowan Tree Joined: 16 Nov 2009 Posts: 135

ponddigger · Posted: Mon Oct 11, 2010 9:54 pm Post subject: pond and stream

hi vulkan,how much to ship a aquamax eco 12000 to ireland yours ponddigger

vulkan · Rank attained: Rowan Tree Joined: 16 Nov 2009 Posts: 135

ponddigger · Posted: Mon Oct 11, 2010 10:24 pm Post subject: pond and stream

photo of pond and stream Idea

Neptune of the Seas · Posted: Mon Oct 11, 2010 10:32 pm Post subject: ponddiggers own pond and stream

hi ponddigger,beatuful photos of your pond and stream Very Happy

neptune

kindredspirit · Posted: Tue Oct 12, 2010 6:01 am Post subject:

Rockworld in Offaly? Kildare? sell a big range of Oase pumps, if you want Oase.

I bought an Oase vacuum unit off of them. Oase are manufactured in Germany and have a very good name.

walltoall · Posted: Tue Oct 12, 2010 10:08 am Post subject: water pumps

Following this thread with interest. The pumps are all primarily bilge pumps and the specification figures mean nothing unless you understand how these pumps work. For instance 13000 litres per hour means it can shift that kind of water on the flat using the maximum diameter of outlet usually about 30cm. But Litre-Per-Hour drops off on a parabolic scale as soon as LIFT is introduced.

These pumps are not designed for continuous hour-on-hour use. The motors overheat even though they are submerged in water, the brushes corrode and they stop working. I've changed many's a bilge pump in my day always on boats that sprang a leak and the pump stayed running gallantly until it burned out. The boat then began to settle and when the water was at about the gunnels I got called in.

In a boat, the pump's float is designed to sense when the bilge fills up to a predetermined mark. On comes the pump and water is lifted from bilge height to perhaps 2 metres up the side of the boat and dumped out to sea. Takes about ten minutes in most [bad] cases to get to the lowest acceptable to the pump which then turns off. Pump may recyle again at hourly intervals in a bad case scenario or every three days not so bad.

I have one of these pumps here at home lifting water from a rainbutt at ground level up 8 metres to my cistern in the roof. (Recycling rainwater through the cistern as a softening aid 'cause we are in a VERY hard water area of Essex).

To actually lift that height I had to use an 8mm internal bore tube. Anything wider and it would not lift it to the height I needed. The flow rate is about 1litre a minute (60litres an hour) on a good day, which is quite a drop from 13000 per hour with a 30mm outlet that is mentioned in the specification.

In a waterfall situation, you might need to flow between 25 and 100 litres a minute (between 1 and 4 bucketfuls) to get any kind of decent result. And the difference in height between pick-up and delivery might be 2 metres? to get a decent flow and fall. So you need a pump which can lift 100 litres a minute (6000 litres an hour x 2 metres).

There are mathematical formulae to work out a result and I can't be arsed doing them but I can assure all Forum users we are looking at serious wattage. €0.50 for 12hrs. which looks about right to lift and push 6000litres up 2metres. But it is €15 per month on a leccy bill.

Do you own sums lads and figure why the Grand Canal gets fed by the Seven Sisters at Robertstown and the River Shannon flows down from the Shannon Pot to Limerick. Neither of them use electric pumps to provide the(40?) locks on the canal or the wonderful falls in Athlone, Doonass and of course Cooragour at St. John's Castle where the Bishop's Lady nearly did for Bould Thady.

However, if the pump was on night rate and was pumping up the water to an upstream reservoir for 12 hrs at night-rate one could have sluice control for day use and make an economical waterfall.

Happy splashing abart t' y'all