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    What you describe sounds like an intermitant...

    What you describe sounds like an intermitant short, probably in the common wire. I would check the wire connections and probably redo them even if they look good. I have had many cases where a...
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    I would check the center flow control knob on the...

    I would check the center flow control knob on the valve to make sure it is open enough. Sometimes they can be turned closed from the factory without being noticed before being installed.
  3. I'm going to guess that station 4 is your largest...

    I'm going to guess that station 4 is your largest zone, probably with rotor or impact heads and the sudden loss of pressure when the zone activates is what is causing the backflow to open. Installing...
  4. The next thing to check is if there is a master...

    The next thing to check is if there is a master valve installed before the pvb. If there is then the pvb is acting normaly. Also the master valve should have been installed after the pvb just to...
  5. It sounds like you need to find one more valve...

    It sounds like you need to find one more valve near the water source. This can normaly be found near the meter but if your source is from the house it could be inside.
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    I normaly see this happen as a zone starts till...

    I normaly see this happen as a zone starts till it reaches full pressure to seal the heads. Since these heads need about 30psi to seal I would go ahead and change the nozzles and see what improvement...
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    The first question is it a single valve that is...

    The first question is it a single valve that is the problem or all the valves at the manifold. I it is a single valve then it's probably a broken or bad connected station wire. If it's more than one...
  8. I have to ask if your water source is a well...

    I have to ask if your water source is a well feeding a tank. The only way I know to get that effect from a pvb is if the main line pressure drops below a certain level till the pump catches up. Try...
  9. although I'm unfamiliar with the codes in your...

    although I'm unfamiliar with the codes in your area, it's best if a shut-off valve and backflow preventer are installed at 36" inside a valve box for access then bring your line up to 12" for your...
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    it sounds like the zone 1 valve needs to be...

    it sounds like the zone 1 valve needs to be rebuilt or replaced. I usualy see this problem when a diaphram goes bad or a lot of debris has got into the valve.
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    at that spacing and with a lower flow rate and...

    at that spacing and with a lower flow rate and pressure the rain bird 3504 would be a better choice. it's designed for just your requirements
  12. sorry, no pictures since I rarely use poly but...

    sorry, no pictures since I rarely use poly but LOWES or any home improvement store should be able to show you a comparison between the different grades.
  13. 160 would be good. that would handle any possible...

    160 would be good. that would handle any possible surges in water pressure which is the main risk with any piping.
  14. although I do not use poly myself if what you get...

    although I do not use poly myself if what you get is rated for about 120 psi it will handle the static pressure just fine. I've seen poly used for irrigation main lines which are under pressure the...
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    as a test you can switch solenoids with another...

    as a test you can switch solenoids with another valve to see if your problem moves to the new valve. that said, in my experiance what youve said tells me that the solenoid is bad and needs to be...
  16. it will be my guess that they will recomend three...

    it will be my guess that they will recomend three maybe four zones for the grass and one for the beds. as for valve placement a single manifold will likely be the recomendation.
  17. although the friction loss will not be that much...

    although the friction loss will not be that much the smaller pipe will increase the velocity thus increasing friction loss. As far as valve placement that varies by designer. For the design most of...
  18. your numbers look good so far. the next question...

    your numbers look good so far. the next question is where you plan to connect your system to your water source. the best place would be within a couple of feet of the meter. then factor in friction...
  19. glue = pipe cement and primer

    glue = pipe cement and primer
  20. sorry my instructions were a little hard to...

    sorry my instructions were a little hard to understand. first the parts and tools- 1 pvc saw, pvc cement and primer, 1 valve, 1 expandable repair coupling. 1 male adaptor, plumbers thread tape....
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    you may also feel the vibration of the water...

    you may also feel the vibration of the water through the pipe.
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    although it's very unusual for all the solenoids...

    although it's very unusual for all the solenoids to go bad it's possible. first I would check the voltage at the clock, it should be 24v to each running station. if the voltage is good I would...
  23. personly, since I'm in irrigation I would just...

    personly, since I'm in irrigation I would just replace the valve with a better quality valve such as rain bird or hunter. in this case it looks to be an easy replacement, just cut the downstream line...
  24. you can try redoing the wire connections but most...

    you can try redoing the wire connections but most likely you will need to replace the solenoid wich is the part the wires are connected to and that should fix the problem.
  25. If you have enough room between the pvc and the...

    If you have enough room between the pvc and the wall cut the pvc 1" below the elbow, tighten the ball valve one turn then install a coupler below the elbow.
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