needs ideas to finely control drip rate

glhein(9)May 22, 2014

I have a situation where I need to restrict the drip rate of a subsection of my drip irrigation system. Unfortunately, I don't have the option to place the subsection on a separate watering schedule. I have a 5/8" mainline with four 1/4" lines w/ emitters that makes up the subsection.

I need to drop the drip to about 20% of the current rate. I'm at a loss for a good way to do this. I'm thinking a fine needle control valve spliced into the 5/8" line would do the trick, but I don't know exactly buy at the hardware store.

Anybody got some ideas?


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Change the sizes of the emitters so the same time delivers less water.

5GPH for the main and 1GPH for the 20% (0r 10 and 2 ... depends on how much water you need)

It's the common way to deal with a mix of plants on a single line -

    Bookmark   May 22, 2014 at 4:16PM
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I already have 1/2 GPH emitters on the subsection. I'm not aware of emitters that run at 1/8 GPH or slower.

    Bookmark   May 22, 2014 at 4:54PM
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Emitters commonly come in 2, 1, and .5 gph sizes. There may be other flow rates available, check a cataloge (rainbird is probably your best bet) if you can't go smaller on your 'subsection', up the main part.

    Bookmark   May 23, 2014 at 7:36PM
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familyman2004(z8 MS)

Dripworks sales 2 types of 1 quart per hour drippers that I use for small pots. one is pressure compensating the other is not.

Here is a link that might be useful: quart dripper

    Bookmark   May 24, 2014 at 11:40PM
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Cut into the drip line, put a small 1/2 ballvalve.

How long of a run of pipe do you have?

    Bookmark   May 31, 2014 at 11:49AM
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The main pipe for the subsection is about 15 feet. I like the idea of working in a ball valve. I'm also going to look for the Dripworks 1 qt/hr drippers.

    Bookmark   May 31, 2014 at 11:59AM
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Have you installed a filter/ reducer in this zone?

    Bookmark   May 31, 2014 at 12:30PM
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