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  1. #11
    Super Star Member J_J's Avatar
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    Sep 2003
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    17,350
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    JACKSONVILLE, FL
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    Power-Trac 1445, KUBOTA B-9200HST

    Default Re: underground water lines, what size plumbing

    You could also do 1 in thin or thick wall PVC and blue glue. Thin wall will flow more water.

    To measure what your pump flow is, take a 5 gal bucket and fill it up.

    5 gal - 60 sec = 5 GPM

    5 gal - 30 sec = 10 GPM

    5 gal - 15 sec = 20 GPM

    If you look in the outlet of your spigot, you may only have a 3/8 hole in it.

    A 1 in gate valve from pump flowing into a bucket ,

    A 1 in sprinkler valve would work fine. It also has manual control. A transformer and switch will work. A sprinkler timer will make it automatic.
    J.J.

    When I works, I works hard. When I sits and thinks, I goes to sleep.

    Git er done.

  2. #12
    Veteran Member
    Join Date
    Oct 2011
    Posts
    1,885
    Location
    Monrovia, California
    Tractor
    Kubota BX25

    Default Re: underground water lines, what size plumbing

    A 1" Schedule 40 PVC water line is what I would use if I only
    wanted to turn on one bib at a time. If I didn't care about volumn
    I would do it all in 3/4" .

    If you buy PVC buy from a supplier that stores it indoors
    and NOT in sunlight. Or get UV Resistant brown PVC pipe.
    I have seen too many poly pipe failures to use it myself.
    Sch 40 PVC will outlive our childrens children when installed
    correctly. It is FAST and cheap. If it is PolyEthelen (sp)
    it will be better than PVC, I believe it was teh Poly"butalene"
    that had issues.

    The really thin PVC piping, buy it and you will regret it. A shovel
    will go right thru it doing future repairs, you have beeen warned!
    Schedule 40 is par, Schedule 80 is insane thick. I think Schedule
    120 is the junk really thin stuff.

    I do not think anyone has mention'd friction loss, basically
    water slows simply by the friction it creates flowing thru fittings and
    as it contacts the sides of the pipe itself, the friction slows it down
    thus why a larger pipe size helps a lot in very long runs.

    Additionally you loose about 1/2 a pound of pressure for every
    12" you go up from the pump as well, conversly you can gain
    almost 1/2 a pound pressure for every foot you go down too.

    If you want GREAT "volumn" install full port ball valves
    instead of hose bibs and simply screw a 3/4" MIP x Male Hose
    adaptor into the full port ball valve, THAT will give you some
    serious volumn, if you have a lot of pressure as well you will
    be amazed at the outcome using these parts. Want the water
    to shoot maybe 30' or so, screw a brass maybe 5" long tapered
    nozzle to the hose. If you think you have need to someday
    fight a fire to NOT use full port ball valves is criminal IMO

    Use metalic risers, a really cool way to support the risers from
    breaking is to drill a proper size hole in a nice semi flat rock,
    lay the pipe /w a rider, slip the rock over the riser and bury 1/2
    way and then crew on a garden bib or a full port ball valve
    after a 90 and adaptor. Looks great, keeps weeds awaydirectly
    around the riser as well.

    DO NOT USE FEMALE THREADED FITTINGS FOR YOUR TRANSISTIONS!
    Use a metalic female couple then use Schedule 80 MIP x Slip PVC
    adaptors.

    Hose? Sears Craftsman all rubber black hoses are awesome.

    Werks fer me!
    Regards,

    Artisan

    Kubota 2012 BX25 (23H.P. / 17.7pto)
    14' Dump / Carson 12K Tow Trailer w/ movable Winch,
    Canopy, Tunes, Stabilizer Soft Pads, 10"-12"BH Buckets, FEL Grapple, Fasse Valved & Switched,
    Fire Extinguisher, ChainSaw Mount, Protective Surround / Enclosure in the works.

    Stayin' Alive (This click could save a life...)

  3. #13
    New Member
    Join Date
    May 2012
    Posts
    24
    Location
    Phelps, Wi.
    Tractor
    Kubota BX25

    Default Re: underground water lines, what size plumbing

    Bigger is better!
    I run 4 sprinklers that are on 3/4 " and they are perfect. 1/2" from the house into the 3/4 for 75 ft. then the garden starts.
    I put the 4 heads on 1 side which is 75 ft. long, on top of the fence (6 ft.)
    The garden is 35 wide so to get the whole thing watered I had to put in 2 gate valves. I do 1/2 the garden for ten minutes then the other side for ten more.

  4. #14
    Super Member rswyan's Avatar
    Join Date
    May 2004
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    8,712
    Location
    Northeast Ohio
    Tractor
    Kubota B2910, Simplicity 18 CFC, Cub Cadet 782

    Default Re: underground water lines, what size plumbing

    Not to hijack the thread but a quick question:

    I used 1" 100 psi rated poly waterline to run water out to my polebarn from the house .... it's buried 4' to 5' deep and bedded in clean sandy loam.

    Currently I have it temporary hooked up to a hose bib at the house as the supply .... the plan is run it through the basement wall (below grade) - which is solid poured concrete and then tie it into the water lines in the basement. The supply line from the well pump to the pressure tank is also 1".

    I have quite a bit of the 1" (100 psi rated) poly waterline left over, unused (it came in a 250' or 300' coil which was more than I needed) ....

    Is there any reason why I can't (or shouldn't) use it inside, in the basement, to make the connection to the existing plumbing in the house ? (The well pressure switch is set to switch off the pump at 60 psi ....)

  5. #15
    Super Star Member J_J's Avatar
    Join Date
    Sep 2003
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    17,350
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    JACKSONVILLE, FL
    Tractor
    Power-Trac 1445, KUBOTA B-9200HST

    Default Re: underground water lines, what size plumbing

    You might check with your insurance company using that pipe.
    J.J.

    When I works, I works hard. When I sits and thinks, I goes to sleep.

    Git er done.

  6. #16
    Super Member rswyan's Avatar
    Join Date
    May 2004
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    8,712
    Location
    Northeast Ohio
    Tractor
    Kubota B2910, Simplicity 18 CFC, Cub Cadet 782

    Default Re: underground water lines, what size plumbing

    Quote Originally Posted by J_J View Post
    You might check with your insurance company using that pipe.
    J_J,

    Thanks - good point.

  7. #17
    Elite Member
    Join Date
    Oct 2004
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    2,923
    Location
    limerick pa lycoming county pa
    Tractor
    kubota bx23

    Default Re: underground water lines, what size plumbing

    Quote Originally Posted by aczlan View Post
    I would use the black poly pipe. Available in large rolls (up to 500' or so) at your local plumbing supply store with pressure ratings from 120PSI up to 200PSI.
    I like 200PSI pipe because while it costs more than the thinner stuff, the price difference isn't enough to be worth my time to dig it back up in a couple of years when the thinner stuff fails.
    One note, when putting fittings on, a propane torch works wonders to soften the end of the pipe and make the fitting go on easily.

    Aaron Z
    Im with Aaron on this one 1" polypropylene pipe the only way to go pvc if it freezes will burst polypro will survive (some fittings have issues) but the pipe will be ok.

    tom
    If it ain't broke we will help you brake it
    If it is broke we will help you get it fixed!


    https://www.facebook.com/joseph.t.mussington

  8. #18
    Elite Member
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    Oct 2004
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    2,923
    Location
    limerick pa lycoming county pa
    Tractor
    kubota bx23

    Default Re: underground water lines, what size plumbing

    Quote Originally Posted by aczlan View Post
    I would use the black poly pipe. Available in large rolls (up to 500' or so) at your local plumbing supply store with pressure ratings from 120PSI up to 200PSI.
    I like 200PSI pipe because while it costs more than the thinner stuff, the price difference isn't enough to be worth my time to dig it back up in a couple of years when the thinner stuff fails.
    One note, when putting fittings on, a propane torch works wonders to soften the end of the pipe and make the fitting go on easily.

    Aaron Z
    Im with Aaron on this one 1" polypropylene pipe the only way to go pvc if it freezes will burst polypro will survive (some fittings have issues) but the pipe will be ok.

    Do't neck it down with 1/2 it will be like breathing through a straw!
    tom
    If it ain't broke we will help you brake it
    If it is broke we will help you get it fixed!


    https://www.facebook.com/joseph.t.mussington

  9. #19
    Super Member
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    Apr 2000
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    8,032
    Location
    Shingle Springs California
    Tractor
    New Holland TC40D

    Default Re: underground water lines, what size plumbing

    Intersect the main before it runs in to the house. Don't use the 1/2" line from the house. 1/2" is too small, and limits flow. Make sure to put a shutoff valve on this new water supply line. You most likely have a 3/4 or 1" main coming in to the house from the well...

    Check code; a "main" may need to be 18" or deeper, depending on your area, freezes etc.

    Don't use the thinwall PVC pipe. Tree roots, rocks, etc will eventually damage it. This is a regional thing, like use of the poly pipe; I have never seen poly pipe use around here.

    Never push the friction/flow tables; always go a size bigger on pipe.

    Remember, on a well, you want to flow enough water to keep the well on; you do not want your pump cycling(wears the pump)

    GET THE BOOK... Get the Rainbird and/or Hunter irrigation catalog. They have EXCELLENT descriptions/tutorials of how to do everything you(OP) are asking. Go to your local plumbing supply. Around here, we have John Deere(not tractors, but landscape irrigation). Those two books hae the info to find out your well flow/gpm/pressure.

    Look at these sites:
    Selecting a Pump Type - Irrigation Pump Tutorial Page 1

    Irrigation Tutorials Homepage and Main Index
    RobertN in Shingle Springs Calif

  10. #20
    Super Member Gary Fowler's Avatar
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    Jun 2008
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    7,911
    Location
    Bismarck Arkansas
    Tractor
    2009 Kubota RTV 900, 2009 Kubota B26 TLB & 2010 model LS P7010

    Default Re: underground water lines, what size plumbing

    RobertN has the best advice so far. Go to the experts and check the design for what you want to do. I had a sprinkler system put in a year or so ago and questioned the guy on using 2" sized PVC for the headers when all I had was a 1" main line meter from city water supply. He said that was the recommended size by Hunter (sprinkler manufacturer) to reduce friction loss in the lines. He then used 1" lines to feed all the sprinler heads that reduced down to 3/4" into the sprinkler head. This was all because he wanted to eliminate the friction loss in the pipe. As designed and installed, I have 10 sprinkler heads on some of the zones and they will all turn a 25 foot radius of water with no problem.
    When I built my house and put in the sewer and water I ran a 1" line to my shop and teed off of this to install another freeze proof hydrant in my back yard for other watering use by teeing into the main to th house (2 valves on at this point so I can isolate either or all in case of a leak. The run to the barn is about 150 feet from the meter and city water pressure here is 100 PSI and unrestricted on this line. That 1" line gives me more than enough water land pressure for any hose needs I have.

    Some sprinkler installers are not the experts and need to be given a wide berth though. I had one that required me to put in a 2" water main. My water company guy basically refused to do that and told me that was ridiculous idea and that he would swap out the 3/4" meter(standard size for homeowners) to a 1" for a nominal fee and it would work fine. After seeing it work, I have to say, I am glad I didnt spend the small fortune it would have cost to put in a 2" meter.
    2010 LS P-7010C 20F/20R gear tractor & FEL, 2009 Kubota B 26 TLB, RTV 900 Kubota,17 foot Lund boat with 70HP motor, 2012-20 ft 12k GVW trailer, 2011- 52" Craftsman ZTR mower, 2013 Ferris Zero Turn, 3 weed whackers, pressure washer, leaf blowers, 7 foot bush hog, 8 foot landscape rake , 8 foot 3 PH disc, 2 row cultivator, 350 amp Miller AC/DC welding machine and all the tools needed to keep them all repaired and running.

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