Diffusing the Hose's Stream

dudsiamApril 25, 2012

I have a raised garden which is 3 1/2' by 25'. My only water source is from a well with a 1HP submerged pump. The pump on the well is also the source for my underground sprinkling system for my lawn. My problem the erosion this strong stream is causing to my raised garden. I have tried the light-weight aluminum diffuser's but my pressure is so great that it just rips the diffuser apart. Years ago, I had a plastic diffuser that I think would have withstood the pressure, but I cannot find it.

I have googled "hose-end diffuser", hose soaker, and other similar names with no success. Surely, I am not the only person that waters with strong pump in a well. How can I prevent erosion from the force of the water?

I am afraid if I turn down the pressure at the faucet, I will do damage to the pump. What are my options? I could diffuse the water stream with my thumb, but I am trying to water without spraying directly on the plants.

I hope I have explained my situation clearly enough for someone to give me some ideas.



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You will not do damage to the pump UNLESS you cut off all the water flow for many minutes. Most pumps will not suffer any damage from no flow unless they have no flow for 10+ min. Just cut down your supply at the pump. If a well pump only pumps 1/4 gallon of water an hour it can't overheat so don't worry about the pump so much. When your done watering just turn off the pump.

Good luck,

    Bookmark   April 28, 2012 at 7:57PM
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Thanks Tom for the information. I will give that a try. With less pressure, I should be able to use the aluminum diffuser that I have without doing any damage to it. I just wasn't sure how long you could run the pump without doing harm.

I appreceited your response.


    Bookmark   April 29, 2012 at 8:55AM
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Here is how pumps work that most people don't understand. Pumps don't hurt to run without flow BUT they do (through friction) heat the water. This friction will boil the water in 15-30 min in most pumps. Some pumps (such as a modern Goulds pump) resist this boiling by internal design but are not perfect. Basically if you run your pump without flow for a few min your fine. That being said even a tiny flow will not allow the pump friction to boil the water. Simply a tiny flow will stop the boil. So if you are going to reduce the flow it will never hurt the pump. Don't know what aluminum diffuser you are using but I would say you are fine and will not damage it. A 1hp pump is not that strong really. Most likely it is a sprinkler pump and the max pressure is only in the +-55PSI range. You will be fine.

Good luck,

    Bookmark   April 29, 2012 at 9:19AM
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