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txirrigation
08-05-2011, 06:17 PM
Well we ran across a first today. What are the reliable ways of tapping a galv supply pipe?

Thanks in advance!

Wet_Boots
08-05-2011, 06:23 PM
Maybe the safest way is with a waterworks compression tee.

irritation
08-05-2011, 06:26 PM
Brass compression tee. Depending on how old it is and water quality, you may need to ream it out first. I've seen 1" galv pipe clogged from the street to the house at about 1/4" inside diameter.:)

greenmonster304
08-05-2011, 06:40 PM
Good luck. Back in may I did a job that had a 2" galvanized service line from the street. I tapped inside the crawl space where it turned to CU and got about 7 gpm at 40 lbs. It sucked. I imagine that the 2" is closed up to about 1/2".
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mitchgo
08-06-2011, 12:24 AM
Boots or irritations ways are really good

Personally I would tap new threads on the galvi and install 2 unions on either side of the tee, or use the meter's union.

FIMCO-MEISTER
08-06-2011, 12:30 AM
Replace the galvanized. Like Irritation says it's probably 1/4". I flat will not work on a galvanized irrigation system or tap into a galvanized line and Dallas had plenty. Copper shortages especially during the Korean War led to a few getting put in.

SoCalLandscapeMgmt
08-06-2011, 12:52 AM
Cut it, thread it and use SCH 80 unions and tee to make your connection
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SoCalLandscapeMgmt
08-06-2011, 12:53 AM
We still have one account with an all galvanized hydraulic system..... Any time we have issues we ut and thread.
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mitchgo
08-06-2011, 01:10 AM
Cut it, thread it and use SCH 80 unions and tee to make your connection
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It's not wise at all to thread a metal male fitting into a plastic female

SoCalLandscapeMgmt
08-06-2011, 01:14 AM
It's not wise at all to thread a metal male fitting into a plastic female

Done it many times on a 2" galv main with about 85psi. The key is to use SCH 80 and to not over tighten the PVC fittings. Never had a failure yet. I've got repairs like this that have been in the ground for 15 years with no problem!
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Wet_Boots
08-06-2011, 06:23 AM
a waterworks compression tee will have some means of mechanically gripping the pipe it goes over, and not having to cut threads saves enough labor to buy the tee

txirrigation
08-06-2011, 12:35 PM
Brass compression T went in. The pipe was secure on both sides so I am not worried about it splitting. We will see how it works, no call in from the guys means good news so far.

txirrigation
08-06-2011, 03:58 PM
Just heard from my guys and the tee worked and system is at 100psi.