The 1/2 nozzle is the 1st on the left. Nozzle is not water level dependent.
Use adequate screening on pump inlet to prevent debris from plugging nozzles. HOW TO SELECT THE CORRECT PUMP FOR YOUR FOUNTAIN NOZZLE/NOZZLES. To select the correct pump for your fountain please follow the steps below. Select the nozzle pattern desired.Select the height (or diameter) desired for the nozzle. Look at the chart to determine the GPM (or G) and Head (H) required for the nozzle. The pump you choose must have the required GPH flow at the HEAD indicated in order to achieve that size display. The GPM flow at specific HEAD heights will be indicated in the manual or advertising for the pump in question. #1 - for multiple nozzles multiply the GPM required by the total number of nozzles desired. It is not necessary to increase the HEAD when adding multiple nozzles. #2 - If the pump you are viewing indicates flow in GPH (gallons per hour) instead of GPM (gallons per minute) you can divide by 60. 900 GPH equals 15 GPM.
#3 - Try to select a pump that is slightly more powerful than required to allow for errors in calculation. #4 - All charts assume pump to be positioned at or near the nozzles. If the distance between pump and nozzle/ nozzles is greater than 10 foot additional HEAD will need to be factored in. This item is in the category "Home & Garden\Yard, Garden & Outdoor Living\Ponds & Water Features\Outdoor Fountains".The seller is "diypondaeration" and is located in this country: US. This item can be shipped to United States, Canada.