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Old 09-15-2011, 03:23 PM   #31
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The pump valve? Which pump do you use?
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Old 09-15-2011, 03:26 PM   #32
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I use ehiem,they have a valve on the outlet to adjust flow.
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Old 09-15-2011, 03:31 PM   #33
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Quote:
Originally Posted by carey View Post
Easy, cheap and effective.
Yep, yep and yep but maybe I shouldn't go here but.......

I was asking because I see alot of ball valves used for throttling flow. Ball valves are for "shutoff" flows. They are excellent shutoff valves and are not meant for controlling flow though they can be used that way.

Globe valves are one type of valve made for throttling flow. Cost at the hardware store is about the same.

Ball valves center disc will eventually cut from the flow and pressure against them and need to replaced. The disks that are in the globe valve are made for the flows and take much much longer to wear out depending on the application.

I'm bringing it up cause alot of people use pvc in their piping and replacing a valve can be a pain. If globes were used, the chance of replacing in this type of application is almost nil.
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Old 09-15-2011, 03:32 PM   #34
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Quote:
Originally Posted by David S View Post
I use ehiem,they have a valve on the outlet to adjust flow.
Thanks, was just curious. If you do use a eventually separate valve for something, just take a gander at my previous post if you like. I was just hoping to save anyone some work in the future.
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Old 09-15-2011, 03:43 PM   #35
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Thanks, was just curious. If you do use a eventually separate valve for something, just take a gander at my previous post if you like. I was just hoping to save anyone some work in the future.
Good point,well noted.
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Old 09-15-2011, 04:09 PM   #36
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Good point,well noted.
Whew I was hoping was wasn't going off topic and was hoping I wasn't stepping out of bounds and on toes.

I'm no good at explaining and it always seems to come out like I'm ??tching. LOL
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Old 09-15-2011, 08:46 PM   #37
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that's great info. i'm wondering how long it would take for a couple thousand gallons per hour of sea water to wear out a ball valve.
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Old 09-15-2011, 08:53 PM   #38
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Let's hope none too soon. LOL
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Old 09-15-2011, 09:03 PM   #39
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well, in my experience, once you get the flow dialed in, you never touch the valve again. mine have lasted a few years...
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Old 09-16-2011, 12:22 AM   #40
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the owner of that store is confusing you for no reason. it's only a couple hundred GPH difference and that can easily be adjusted down with a ball valve. no need to return anything, unless of course you want to purchase a better brand pump.
what problem can you have with using this pump? you can safely choke back the pump with a ball valve at the exhaust port.
are you still using the 925 gph overflow box?
I'm using an eshopps 800gph overflow now. The 17hf is 840 gph at 4' head and the rio aqua 2500 is 529 @ 4' head. I was thinking I could just choke it back too. Only problem is I was planning on using 3/4" flexible vinyl for return. Is there a gate or ball valve that I could hook in there? The owner was telling me that it's not the flow TO the tank that counts but it's the flow IN the tank. He said if I run it full open the overflow is gonna have super loud sucking sound.
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