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  #31  
Old 08-30-2011, 05:34 PM
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FIMCO-MEISTER FIMCO-MEISTER is offline
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Okay I'll post the whole scenario and see what you guys think. Not a well man. Think I mentioned that before.
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  #32  
Old 08-30-2011, 05:38 PM
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FIMCO-MEISTER FIMCO-MEISTER is offline
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The original post
I had a customer tell me I was unprofessional because I could not gurantee getting rid of the water hammer in a existing system with a well pump. About 50 psi and roughly 10-12 gpm

Entire system was 3/4 schedule 40. Zones were exceeding 13 gpm. They did not want to spend the money for a new system. I removed 46' of 3/4 from the poc, installed 1" and 1"pvb. I renozzled the heads to get to 10 or less gpm, which increased his arc to get head to head coverage. It minimized the hammer. I then added 180' of 1" to get to the other side of the house and installed his existing valves for the already installed zone pipe and spray heads. I renozzled the sprays, a very small area and he didn't like the way water came out of the 5 half nozzles. He wanted more water in the area. Needless to say, he told me he was happy the hammer was nowhere near as bad as it was, however the wife sung a different tune the next day when I went to get paid.

My response
Looks like you got everything below 5fps. If nothing else a shock absorber at the washing machine connection might help a little more. Griswold valves claim to avoid water hammer issues. As a MV it might help. Is the hammer at startup or when zones change? I'd try to deal with the husband obviously.

OP response
at start and between zone changes. I also recommended switching valves as I know dv100 are fast closers. I was dealing with the husband until I went to the house to get paid, I gave him a time I'd be there and I passed him on my way to his house. I know who wears the pants in that house.

My response
I'm getting curious now. My troubleshooting gene is kicking in. Which controller are you dealing with? Is there any chance the pump is shutting down between zone changes? Is a pressure activated pump?

OP response
There is no relay for the timer. The timer the homeowner installed is Hunter x-core. The pump has a pressure tank which cycles according to the well tech. every 45 seconds. I did recommend installing a flow switch and pressure switch for the system to have continual even flow no matter if they were irrigating or using house water. The rid-o-rust tank is connected to a pump relay.

Then I came here
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  #33  
Old 08-30-2011, 05:47 PM
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AI Inc AI Inc is online now
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weird, actualy a hunter closes a lot faster then a 100 dv.
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  #34  
Old 08-30-2011, 05:48 PM
bcg bcg is offline
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So the pump is short cycling every 45 seconds or so? If so, the first thing I'd do is install a Cycle Stop Valve to fix that problem. Odds are that fixing the short cycle will also help a great deal with the water hammer. Honestly though, with a pressure tank, it should be absorbing a lot of the hammer so it would be a good idea to also check the air pressure in the tank and recharge it if needed.
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  #35  
Old 08-30-2011, 05:56 PM
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Wet_Boots Wet_Boots is online now
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echo the Texan - stop the cycling and check the pressure tank



...and don't piggyback on other threads - you piker

Last edited by Wet_Boots; 08-30-2011 at 06:03 PM. Reason: admonishment
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  #36  
Old 08-30-2011, 05:56 PM
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FIMCO-MEISTER FIMCO-MEISTER is offline
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I passed that on. THKS Always open to more though.
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  #37  
Old 08-30-2011, 06:17 PM
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Mike Leary Mike Leary is offline
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Quote:
Originally Posted by Wet_Boots View Post
...and don't piggyback on other threads - you piker
Ouch!.....the MAN makes a true statement.
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  #38  
Old 08-30-2011, 06:23 PM
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FIMCO-MEISTER FIMCO-MEISTER is offline
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Only on well stuff. No piggybacking other than that. It gives me a chance to learn a few things.
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  #39  
Old 08-30-2011, 09:03 PM
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Sprinkus Sprinkus is offline
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Is it a VFD drive or a pressure switch?
The small pressure tank make me think that it's using a VFD or a cycle stop valve/pressure switch combination.
If it' a VFD then the settings could possibly be able to be changed to fix the problem.
Pictures would be helpful.
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  #40  
Old 08-30-2011, 10:07 PM
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FIMCO-MEISTER FIMCO-MEISTER is offline
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Can't answer that. I think he had a falling out with the customer so we may never know.
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