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Old 12-07-2013, 09:57 PM
gravity gravity is offline
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Location: spuzzum bc
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Questions about gravity feed system from creek

1. Anybody know a good chinese supplier of pvc fittings? Recently paid $20 for a 2 inch pvc union at southern drip irrigation.

2. My system is half pvc and half poly. I will switch to all poly as temp gets down to minus 12 in winter. I will continue to use pvc valves and unions because it is impossible to disconnect poly compression couplings in cold weather.

3. The majority of the system is not buried so I have to allow water to drain during the winter so that there is constant flow. A dripping tap is not enough. During summer the drain is shut off. Some of the line is a few inches from ground so I will bury that. I think that will add some energy to the system during winter.
4. A flat area of pipe near the end of the line seems to freeze first when I forget to open drain. The steeper area closer to intake takes at least a couple days to freeze.

5. I was going to ask about how to make a gradual 90 degree turn with pvc pipe but I guess I will just use a piece of poly. Once i convert to all poly this will be moot. Currently using two 45 degree elbows.

6. Why pvc doesnt work. a. gets fragile when cold and breaks when undoing union. b. ice expansion breaks it easily c. ice builds up on outside of pipe and weighs it down and breaks it d. plastic weld joints fail sometimes

I guess this is more a tutorial. Hopefully, someone will not make the mistakes i made.
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Old 12-08-2013, 07:44 AM
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greenmonster304 greenmonster304 is online now
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$20 for a union? Seems high even for home owner. Why don't you just blow this system out with a compressor instead of trying to get it to gravity drain?
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Old 12-08-2013, 02:47 PM
gravity gravity is offline
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Originally Posted by greenmonster304 View Post
$20 for a union? Seems high even for home owner. Why don't you just blow this system out with a compressor instead of trying to get it to gravity drain?
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The system supplies water year-round. The intake remains on through winter. The drain ensures constant movement. About .25 miles of 2 inch.

If the flow stops,
system freezes in few hours
I drain the system and melt the ice. I isolate the frozen section and send water through to melt ice.
Its minus 12. Right now and system is operational.
I have 25 acres
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Old 12-08-2013, 03:18 PM
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greenmonster304 greenmonster304 is online now
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Quote:
Originally Posted by gravity View Post
The system supplies water year-round. The intake remains on through winter. The drain ensures constant movement. About .25 miles of 2 inch.

If the flow stops,
system freezes in few hours
I drain the system and melt the ice. I isolate the frozen section and send water through to melt ice.
Its minus 12. Right now and system is operational.
I have 25 acres
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Roger that.
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Old 12-08-2013, 04:46 PM
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CAPT Stream Rotar CAPT Stream Rotar is offline
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what needs water when it is -12?

animals?
people?
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Old 12-08-2013, 06:55 PM
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Maybe you should rent this for a few days and plop your system in the ditch.

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Old 12-08-2013, 07:21 PM
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1idejim 1idejim is online now
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Originally Posted by greenmonster304 View Post
Maybe you should rent this for a few days and plop your system in the ditch.

Or this







Put that pipe in the ground son
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Old 12-08-2013, 07:34 PM
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Ohshit. I feel the ghost of Mike Leary peering over my shoulder.
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Old 12-08-2013, 07:46 PM
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Ohshit. I feel the ghost of Mike Leary peering over my shoulder.
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Is that last one a drainage tile plow?
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Old 12-08-2013, 08:27 PM
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Is that last one a drainage tile plow?
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No. They pre-assemble the pipe and risers and plow them in with that sled.

Its in the ground in the first pic.
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