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Old 01-22-2013, 09:12 AM   #1
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Irrigation tap pipe size


Main water line into house is a 3/4" meter and copper pipe. It is reduced to a 1/2" just after it enters the crawlspace and before making its way to the water heater. Should I tap for an irrigation line with a 3/4" pipe before the reduction or tap with a 1/2" pipe after. I am worried that if I tap before then it will screw up the flow to the house.

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Old 01-22-2013, 09:51 AM   #2
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Irrigation tap pipe size


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Main water line into house is a 3/4" meter and copper pipe. It is reduced to a 1/2" just after it enters the crawlspace and before making its way to the water heater. Should I tap for an irrigation line with a 3/4" pipe before the reduction or tap with a 1/2" pipe after. I am worried that if I tap before then it will screw up the flow to the house.


Tap before the reduction,it won't bother the flow to the house.

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Old 01-22-2013, 10:46 AM   #3
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Irrigation tap pipe size


Does it matter if the tap is a 3/4" or 1/2"
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Old 01-22-2013, 12:12 PM   #4
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Irrigation tap pipe size


Sure it makes a difference,you need all the flow you can get for your irrigation.
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Old 01-22-2013, 01:12 PM   #5
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Irrigation tap pipe size


Did anyone notice he only has 1/2 main runs?
What do you thinks going to happen to the flow and pressure in the house when those sprinklers are running?
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Old 01-22-2013, 01:46 PM   #6
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Irrigation tap pipe size


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Did anyone notice he only has 1/2 main runs?
What do you thinks going to happen to the flow and pressure in the house when those sprinklers are running?

No he has 3/4" main and 1/2" when it enters the house,that's why i said to tap before reduction.
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Old 01-22-2013, 03:11 PM   #7
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Irrigation tap pipe size


You definitely need to tap in where it's 3/4", otherwise you won't have nearly enough volume for your sprinkler system. With irrigation even 3/4" is on the small side.
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Old 01-22-2013, 03:47 PM   #8
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Irrigation tap pipe size


Go back and read it again. Someone messed up and used 1/2 to the heater and for the main runs.
He only has a 3/4 supply to the house.
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Old 01-22-2013, 10:02 PM   #9
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Irrigation tap pipe size


you would have to have way more zone then you would want to spend money on if you try to use the 1/2" side of the line, 3/4 like has been said is still going to be a pain, what is your water pressure? in the house and off the 3/4 side?
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Old 01-24-2013, 11:53 AM   #10
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Irrigation tap pipe size


I found these tutorials extremely helpful when designing & installing my sprinkler system: http://www.irrigationtutorials.com/#sprinkler. It'll also give you a better idea of the pain redmann88 & gusherb94 are referring to.
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Old 01-27-2013, 07:01 PM   #11
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Irrigation tap pipe size


last one i did at the last house i was living at i use http://www.orbitonline.com/ to design it, and then made a list of the parts i needed and any modifications i wanted to keep the price down. then went to the store and got the stuff.

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