Calculating Waterfall Pump Flow Rates

Waterfalls or watercourses not only look great and bring the tranquil sound of running water into your garden but Andy Hobson explains that they are also very beneficial for your pond.

Created by David Coton on Tuesday, 14th of May, 2013.
Updated on Thursday, 7th of December, 2017.


Waterfall at Hall's Garden Supplies, Sutton Coldfield

There are some very good reasons for adding a waterfall to your pond. Water, breaking the surface of a pond adds vital oxygen, this is not only beneficial for ponds with fish or other aquatic life but it has also been found to be very good at promoting friendly bacteria levels. This bacteria then breaks down sludge and silt which sits at the bottom of your pond and can pollute the water over time. 

How Much Water Flow?

The trickiest part for most people is how much water flow is required. It’s actually very simple to calculate as I will explain.

First you need to measure the head height or head measurement, this is the height of the waterfall from the surface of the water, and then next measure the width of the waterfall.

If you want to achieve the type of effect that you see in most people's gardens, then the easiest way to calculate the flow is to measure the width in cm and multiply that number by 1.5, this will then give you the required flow rate in litres per minute (multiplying this amount by 60 will give you litres per hour).  

It's important to have the correct flow rate as too little will just give you an unimpressive slow trickle of water, while too much will create an inappropriate torrent.

Waterfall Calculation Example

Below is an example of how to work out the flow required in litres per hour:

If your waterfall is 65cm wide: 65 x 1.5 = 97.5 litres per minute x 60 = 5850 litres per hour flow required.

If you wanted something slightly stronger then just double that number, but we would advise taller walls to your waterfall to prevent water loss.

Of course if you plan to have a tallish waterfall you will still require the same litres per hour but may need a quite large pump that can pump that height at the required rate. This is because as you increase the pumping height the output of the pump in litres per hour decreases.

Type of Pump

When possible, always use a solids handling pump as these can pump through a much larger pipe giving you less loss of pressure and a more consistent waterfall. Try to limit the joints and fittings you use as this can cause a loss of flow.

If you are planning to have a massive waterfall or something with a very big drop it is advisable to speak with a pond specialist as they will be able to calculate an exact specification for you.

There will always be someone to answer queries regarding water flow on our 0121 355 7701 helpline or visit our aquatic superstore in Birmingham. 

 

Related Articles

What To Do In The Garden In August

What To Do In The Garden In August

After the recent spell of hot weather, David Coton was glad to see the recent rain freshening up the Garden Centre and he has these suggestions for some of the jobs that need to be done during August.

Author: David Coton

Written by David Coton.
Published on Thursday, 27th of July, 2017.

Bermuda Aquatics Brand Back In Business

Bermuda Aquatics Brand Back In Business

The Bermuda brand is back! That's the great news GardenSite partner Andrew Hall has received from Bob Meacham, National Accounts Manager for the new owners Evolution Aqua.

Author: Martyn Loach

Written by Martyn Loach.
Published on Wednesday, 14th of December, 2016.

Tetra Survey Proves Pets Are Good For Children

Tetra Survey Proves Pets Are Good For Children

Tetra have been innovators in the world of aquatics for over 60 years, and Ellie Goodall has been reading a research survey they have recently published proving that keeping a pet is good for your children.

Author: Andrew Taylor

Written by Andrew Taylor.
Published on Monday, 27th of June, 2016.

Reasons To Choose An Intalogs or Blagdon Raised Pond

Reasons To Choose An Intalogs or Blagdon Raised Pond

There's no doubt that building a pre-formed or liner pond involves a certain amount of hard work, so Nathan James Dodd thinks that a raised version from Intalogs or a Blagdon is well worth considering.

Author: David Coton

Written by David Coton.
Published on Thursday, 12th of May, 2016.

comments powered by Disqus

RSS

View RSS Feed

Author

David Coton

Partner at GardenSite

View Profile

Follow Us!

Recent Articles

What To Do In The Garden In January

What To Do In The Garden In January

Although the days are short and the view from our Garden Centre is frosty and overcast, Andy Taylor suggests various jobs that can be done in the garden during the month of January.

Author: Andrew Taylor

Written by Andrew Taylor.
Published on Friday, 29th of December, 2017.

GardenSite Donates Christmas Tree To Arthur Terry Winter Concert

GardenSite Donates Christmas Tree To Arthur Terry Winter Concert

Showcasing young musical talent, this year's Winter Concert at Arthur Terry School was an outstanding success and took place against the stunning backdrop of a Christmas Tree donated by GardenSite.

Author: David Coton

Written by David Coton.
Published on Thursday, 21st of December, 2017.

New Street Station Christmas Tree And Selfie Competition

New Street Station Christmas Tree And Selfie Competition

It was quite an honour for GardenSite to be asked to supply the Christmas Tree to Birmingham New Street Station this year, and to celebrate we're offering a Champagne High Tea to the winners of a seasonal selfie competition.

Author: David Coton

Written by David Coton.
Published on Tuesday, 19th of December, 2017.

Garden Storm Damage And What You Should Know

Garden Storm Damage And What You Should Know

With Storm Caroline reeking havoc many people are likely to be contacting their insurance companies at some time regarding damage caused to sheds, greenhouses, fences and other garden property. Robert Hall explains how GardenSite.co.uk can help with an independent insurance quote and claim.

Author: Robert Hall

Written by Robert Hall.
Published on Thursday, 7th of December, 2017.