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Old 08-01-2009, 11:03 PM   #51
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either way I have only used ball valves. They work fine for what I need. Just looking for more knowledge
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Old 08-01-2009, 11:07 PM   #52
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Sure. As discussed previously, you don't actually need a precise adjustment for this application. As long as the capacity of the pump never exceeds the capacity of the overflow the worst thing that happens is a slightly reduced filtration flow.
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Old 08-01-2009, 11:33 PM   #53
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So which one are you guys are saying the best? Because thats alot of valves and they all seem to have there benefits. Should you just put them all on the plumbing of your sump and be fully prepared? *sarcasm*
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Old 08-01-2009, 11:36 PM   #54
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So which one are you guys are saying the best? Because thats alot of valves and they all seem to have there benefits. Should you just put them all on the plumbing of your sump and be fully prepared? *sarcasm*
Pretty much whatever is available for you will work they will all work fine for the application.
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Old 08-02-2009, 12:06 AM   #55
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I say use all the kinds of valves! You could leave the doors open and let people look inside and they would be like "WOW valves symbolize power!" or something crazy.. xD

OR you could just pick whatever is available... (less fun way)
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Old 08-02-2009, 05:49 PM   #56
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So when a pump says "Max. Head: 7.6ft" Does that mean that, thats the maximum height it can handle before the GPH that its rated for starts decreasing?
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Old 08-02-2009, 07:02 PM   #57
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No, that means that is the maximum height before the GPH reaches ZERO
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Old 08-02-2009, 07:07 PM   #58
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Sounds like a clog waiting to happen though no? Never heard of one honestly.. from the description it sounds like a problem waiting to happen in the Aq world.


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They're not the same thing. A ball valve is a ball with a hole through it the same size as the rest of the pipe. The ball can be rotated by turning the handle, so if the hole in the ball lines up with the pipe you have flow and if it doesn't line up then flow is completely blocked.

A globe valve, by contrast, does not have straight-through flow. Rather, water enters from the inlet pipe, flows up through a hole (the valve seat), then continues to the outlet pipe, so the flow is more like this ___|``` The valve disc is attached to the threaded handle and is just a round piece of metal or plastic that screws down onto the seat to stop flow. As it approaches the seat, it throttles the opening to reduce the flow rate.

It's much easier to throttle with a globe valve because it takes multiple complete turns of the handle to thread it all the way down to the shut position, while the ball valve is fully shut before it's been turned 90 degrees.
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Old 08-02-2009, 08:34 PM   #59
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Then im just going to go ahead and get a return pump rated for 800+ GPH and then get a valve to control it. One of those split valves so the extra water gets redirected into the sump. I dont see any other way around it. Get a pump too small and im screwed, get one too big and im screwed. Get one thats too big, but control it with a valve.. better than nothing.
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Old 08-02-2009, 08:39 PM   #60
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I think I missed something, but why don't you just get a pump/overflow box with a close rating? That way you won't have to throttle the flow at all.

My overflow is like 800gph and my pump is almost 700 I think. (edit: actually only around 600 lol)
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