Water Feature Pumps - What LPH do I need?

[mr_simonward]

Hi, I in the process of planning out a new garden, including water feature. The plan is to have a 2-3 ft Slate Monolith suspended over a raised pebble covered pool. All plans are in place, but I don't know what size pump I should be looking for.

I don't want anything thats going to cause the water to 'jet' from the top of the slate, but want a good noticeable flow down the sides of it.

At the moment I'm thinking 1500 LPH - your thoughts and experiences please...

 

[breezer]

Hi, I in the process of planning out a new garden, including water feature. The plan is to have a 2-3 ft Slate Monolith suspended over a raised pebble covered pool. All plans are in place, but I don't know what size pump I should be looking for.

I don't want anything thats going to cause the water to 'jet' from the top of the slate, but want a good noticeable flow down the sides of it.

At the moment I'm thinking 1500 LPH - your thoughts and experiences please...

Flow rate is not as important as head.

in a nut shell.

you can get a filter pump that will pump say 1500lph, but as its a filter pump it may only be able to pump up to say 2 feet this is becuse filter pumps have a low head pressure.

you want a fountain or feature pump that can pump up to at least 3 feet

you may also want to read this

 

[arty53]

To pump a decent amount of water out of a three foot high monolith go for a pump with a two metre head because at three feet you will only get about half the rate at which the pump is rated. A pump with a three foot heat will not lift any water to 3 and a half feet. A pump rated at 4000 lph at water level will lift about 2000lph at three feet high. Have a large diameter exit from the top of the stone for the water and you should not have any jetting.