Ash Posted May 1, 2006 Share Posted May 1, 2006 Well I hope you figure it out, good luck & stuff Link to comment Share on other sites More sharing options...
Bruce Posted May 1, 2006 Author Share Posted May 1, 2006 Thanks...I hope I do aswell. Bruce Link to comment Share on other sites More sharing options...
Josh Posted May 1, 2006 Share Posted May 1, 2006 It doesnt make sence bruce. With no pump running the water in the tank should be at the bottom of the horizontal intakes. Your sump should be about 3/4 full. Is that the way yo have it set-up When the pump is switched on what happens to the water in the sump? and what happens to the water in the tank? Link to comment Share on other sites More sharing options...
Bruce Posted May 1, 2006 Author Share Posted May 1, 2006 The slits on the intake pipes are facing down. I turn on the pump and the water from sump start coming in. I wait till most of the intake pipes are covered and then take off the pipe, end cap and t-joint and dip them all under water to remove air and then attach them to the stand pipe again. I do this to both sides but after a couple of minutes the sump fills too full and then the air tubes up the top start sucking air in and suction stops so I turn the pump off. I think the problem could be that stand pipes are acting like siphons? Bruce Link to comment Share on other sites More sharing options...
BaZ Posted May 1, 2006 Share Posted May 1, 2006 Yep sounds like they are, but not sure how. Fill your tank up so the water starts to run back down to the sump (with the pump off). Then fill your sump to the desired level (of course this needs to fully submerge your pump). What happens if you just turn the pump on and do nothing else? Link to comment Share on other sites More sharing options...
Nigel Posted May 1, 2006 Share Posted May 1, 2006 The pump is to big Bruce my advise buy a 4000lt and hour pump or put a contol valve on the one you have. I doubt you will ever get it to run the way it is. Link to comment Share on other sites More sharing options...
BaZ Posted May 1, 2006 Share Posted May 1, 2006 Either way, if you set it up right to begin with you should never have more water falling into the sump than you expect. Unless these standpipes are not secure or have holes down near the base you should never have more water falling to the sump than was already above the level of the standpipes. Standpipes act like a weir. They determine the water level in your tank. Link to comment Share on other sites More sharing options...
Josh Posted May 1, 2006 Share Posted May 1, 2006 Do the stand pipes have a cap on the top? If so then drill a small hole in the cap. Link to comment Share on other sites More sharing options...
Bruce Posted May 1, 2006 Author Share Posted May 1, 2006 They do have caps, why do I need to drill a hole? Bruce Link to comment Share on other sites More sharing options...
BaZ Posted May 1, 2006 Share Posted May 1, 2006 Nice work Josh! The caps allow passage of air which avoids the syphon situation. Drill a small hole first, then make it a bit bigger until you get the result you want. Of course it will work perfectly with no cap at all but a bigger hole at the top there will make more noise. Link to comment Share on other sites More sharing options...
BaZ Posted May 1, 2006 Share Posted May 1, 2006 You may have already told us but I cannot find the answer... what size tank is this? Link to comment Share on other sites More sharing options...
Bruce Posted May 1, 2006 Author Share Posted May 1, 2006 It's a 6x2x2.5 Thanks, I think these holes may of solved all our problems. I take it the holes need to be outside the water? Bruce Link to comment Share on other sites More sharing options...
BaZ Posted May 1, 2006 Share Posted May 1, 2006 Yep on the top of the end caps. The tops of the caps are out of the water aren't they? (i hope) Link to comment Share on other sites More sharing options...
Josh Posted May 1, 2006 Share Posted May 1, 2006 Right in the top of the cap Link to comment Share on other sites More sharing options...
Bruce Posted May 2, 2006 Author Share Posted May 2, 2006 Ok, we tried it all last night and we figured out that the filter system DOES NOT WORK. The pipes are too small and the falling is too weak for the filter and the siphon is too strong, me and my dad played around with holes and stuff and it will be virtually impossible to even them out. I think the easist and best option at the moment is to install an overflow box to provide an overflow. The sump has two imputs so I thought the best way to do it would be two seperate small ones on the back or one long one. What other options do I have? Bruce Link to comment Share on other sites More sharing options...
BaZ Posted May 2, 2006 Share Posted May 2, 2006 Can you take the caps right off the top of the standpipes? Link to comment Share on other sites More sharing options...
Matthew Posted May 2, 2006 Share Posted May 2, 2006 G'day Bruce. I am just playing catch up with this topic. So stop me if I am missing the problem. You have a big strong pump that is pumping lots of water up into your tank As previously suggested. Put in a bypass line. So that not so much water gets pushed up into the tank. With the bypass line the excess water is simply fed back into the sump. Thus no need to get a smaller pump and no need for an overflow box. Do you follow what I am talking about, when I say a bypass line? Syphon effect This is resolved by adding to the amount of air holes that stop the water from syphoning. PS if the hole gets too big, push in an airvalve and silicone into position. Some sumps are simply not large enough to work properly. You may not have a large enough space to cope with you tank and the uneven intake pipes? Ps you can always put an elbow onto the intake of the pump so that you can keep the water at a lower level in the sump. When you system is operational have a look here to reduce noise on your return pipes Hope this helps Matthew Link to comment Share on other sites More sharing options...
Ash Posted May 2, 2006 Share Posted May 2, 2006 Is anyone in the area able to look at the setup in person for Bruce & diagnose it correctly cause most of what he's said doesn't make sense. No offence meant Bruce. Link to comment Share on other sites More sharing options...
BaZ Posted May 2, 2006 Share Posted May 2, 2006 Got a camera Bruce? Can you take proper pics for us? Link to comment Share on other sites More sharing options...
Nigel Posted May 2, 2006 Share Posted May 2, 2006 I will say it again Bruce the pumps to big it does not matter what you do it will never work. I had a look at your drawing and all there is are two pipes as inlets and I will bet there 25mm. I still say the best option is to get a smaller pump say 4000lt an hour it will never work with an 8000lt an hour pump. The other option is to wiers in where the pipes are if possible then you will be able to run the pump you have. Link to comment Share on other sites More sharing options...
Ash Posted May 2, 2006 Share Posted May 2, 2006 but he was complaining about the filter being overfilled, not the filter being emptied & the pump running dry. That's what makes no sense! Link to comment Share on other sites More sharing options...
Nigel Posted May 2, 2006 Share Posted May 2, 2006 The hole is wrong for the size of the pump I would also like to see some photos as well but I still say the pumps are to big. Link to comment Share on other sites More sharing options...
BaZ Posted May 2, 2006 Share Posted May 2, 2006 I'm with Ash, wouldn't a big pump mean the sump is running dry rather than being too full? The only thing which fill his sump really is gravity. If it's filling too slow he needs bigger pipes and if it's filling too fast he has a syphon of some sort happening. Do we know what size tank this is yet? I'm sure there are lots of tanks out there with that size pump running quite successfully. Link to comment Share on other sites More sharing options...
Nigel Posted May 2, 2006 Share Posted May 2, 2006 I think the tank is a 6x2x2 or a bit bigger. Lets see if we can get him to post some photos that would be good to see how it really is set up intsead of a drawing. Link to comment Share on other sites More sharing options...
Ash Posted May 2, 2006 Share Posted May 2, 2006 tank size It's a 6x2x2.5 ← I'd run a 6000lph pump on that if I had one, an 8000lph isn't much of a stretch so long as the drains to the sump are up to it of course. Maybe that's the problem, they aren't & whoever designed it or Bruce set it up as a siphon to compensate - which of course can never equalise! I thought 2 x 25mm stand pipes could handle 8000lph - I thought they did 4000lph each & with head height on the pump she'd be only putting out about 7000lph anyway? Link to comment Share on other sites More sharing options...
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