How to fix sprinkler system with low pressure?

Hi, decided to install simple pop up sprinkler in backyard with about 12 m long to 5 m wide.

Drew out the plan with mostly overlapping the radius of sprinkler for about 2.5 m across perimeter. However there is lack of pressure. Flow rate is

19 l/min .

Each individual line holds about 15 l/ min with 3 or max 4 pope pop up sprinkler. Also increased the water pressure by turning regulator at main line. Since I don't have pressure measurement equipment so not sure about main pressure but after turning it up at regulator obviously there is higher pressure than before. What would be solution to get it working? I have attached photo as can't upload video. Does it need inline pump to make it work. Can anyone please help . Thanks.

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Comments

MitchellMc

Welcome to the Bunnings Workshop community @nik45. It's brilliant to have you join us, and many thanks for your question about irrigation.

Could you please link us to the pop-up sprinklers you're using? Also, how many of those sprinklers are you running at one time?

A flow rate of 19L/min would allow you to run two Pope 50mm Full Circle Master Pop-Up Sprinklers, which require 10L/min, or four Pope 50mm 1/2 Circle Master Pop-Up Sprinklers, which require 5L/min. Any more than that and their capacity will diminish, and they might not be able to pop up.

The only way to resolve an inadequate water flow issue would be to divide the area into separate sections and run them independently. A zoned tap timer can be useful for this, such as the Holman QuikDial 4x Outlet Tap Timer.

Please let me know if you have any questions.

Mitchell

nik45

https://www.workshop.bunnings.com.au/discussion/comment/57637#Comment_57637

Hi Mitchell, Thanks for replying . I have attached sprinkler layout for better understanding of my work . Hopefully would give you insight of what have I done wrong.

Sprinklers are

pope 50 mm 1/2 circle 5L/min

Pope 50 mm 1/4 circle 3L/min

As depicted on the layout with each line or zones consumption.

Thank you.

EricL

https://www.workshop.bunnings.com.au/discussion/comment/91187#Comment_91187

Hello @nik45

Looking at your plans, it appears that there are too many sprinklers, and it is causing a pressure and flow drop off. Despite using a "T" junction along the line, there is too much demand on the line, and you get flow collapse. You have to keep in mind that each pop up requires a certain number of litres to operate which the takes a toll on the 19L passing through. Even if you increase the flow on the tap its rated flow is fixed at 19L a minute.

I recommend re-assessing your layout and testing it on the Gardena irrigation planner. I propose reducing the number of pop-up sprinklers you have to the minimum amount.

If you need further assistance, please let us know.

Eric

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