What pump should i be using?

  • We are currently upgrading MFK. thanks! -neo
oh ok the tank is 30" high and the output is at the bottom on the outside maybe 33" from the top. i can't get it much lower because of the height of the 55 and stand
 
Cool. It should be ok then. I was going off of the drawing where it looked really high.

Have you tried to remove the cap from the vent tube? Also, are you sure that all of the air is out of the loop that goes over the tank?
 
i'll recheck and see that all the air is out. they dont' seem to really be flowing a lot and one more then the other so that does tell me i might have some air. I'm wondering if i'm have trouble valving down the pump because it is so strong. I think w/ the 2000+gph coming out of it a small turn on a pvc valve is not going to be very specific. so it will be really hard to "dial it in" does that make sense?
 
mwilson;2064853; said:
i'll recheck and see that all the air is out. they dont' seem to really be flowing a lot and one more then the other so that does tell me i might have some air. I'm wondering if i'm have trouble valving down the pump because it is so strong. I think w/ the 2000+gph coming out of it a small turn on a pvc valve is not going to be very specific. so it will be really hard to "dial it in" does that make sense?
Click to expand...

It should be really simple to dial in. The fist thing to do is make sure that both overflows are at the exact same height. That will determine the water level in the tank. With the DIY overflow the water level should never go above the intake. If it does, it's not keeping up with the pump.

If you put a ball valve after the pump, you can decrease the flow until the overflows keep up with it. If the water level starts to go above the overflow then you can close the valve a little more.

Also, it's a good idea to invest in an aqualifter. It will continuously pull water and air out of the pipe so you can be sure that it'll flow at the maximum rate at all time. Also it'll ensure that you wont have problems if power fails. For 12 bucks, it's cheap insurance.



Edit: What's up with the cap on the vent tube? If it's sealed or only has a small hole it will decrease flow like mad.
 
ok here is a slight twist. i have the overflows exactly the same in height. The floor that i put the tank on is not. So the overflows should be level w/ the water right? the end caps have maybe a 1/8" hole in the tops
 
Yea, you should be alright. Have you tried to remove more air and take the vent cap off?
 
Sorry i'm not sure what you ment. Will i be ok with them a little off or should i even them with the water level. One is about 1/4" lower then the other. I'll try to get to the caps and pull them off. I'll have to drain the tank down pretty far to be able to move the monster. I also looked into the aqualifter. I'm going to pick one up maybe tomorrow. How would i hook that up. Check valves on top of the U in the overflow then air tube to a T then to the pump?
 
mwilson;2065080; said:
Sorry i'm not sure what you ment. Will i be ok with them a little off or should i even them with the water level. One is about 1/4" lower then the other. I'll try to get to the caps and pull them off. I'll have to drain the tank down pretty far to be able to move the monster. I also looked into the aqualifter. I'm going to pick one up maybe tomorrow. How would i hook that up. Check valves on top of the U in the overflow then air tube to a T then to the pump?
Click to expand...

The aqualifter is basically a reverse air pump. It just sucks water/air out so the system stays primed. I misread your post about the unlevel floor. If possible, shim the low one up to match the high one.
 
Thank you very much for so much detailed help. i appreciate it. I realize now that i had my vacuum line in the wrong place and that there was no way i would be able to get all the are out. Thanks again!
 
No problem! Keep us updated!! Let us know if you get it fixed.
 
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