someone, anyone please help with my pump

[jmp21677]

I have plumbed my iwaki 30xlrt in as a circulation pump and for whatever reason can't get it to stop putting massive amounts of bubbles into my tank. I can't find any drips and have sealed all the fittings with pvc glue and silicone, and it still hasn't helped. I have re-plumbed this thing twice already and don't want to do it again. Does anyone have any suggestions.

JOE

 

[mfinn]

The only thing I could think of sitting here and you there, is the bulkhead on your sump and the piping to the suction side of the pump the proper size?
By that I mean if the iwaki 30 rlxt is 1" in and 1" out, is all the parts from the sump to the pump 1"?
Too small of a size will cause the pump to cavatate.
If thats not it, try turning the pump off and on a couple of times.

 

[jmp21677]

The pump isn't plumbed to the sump. It is plumbed with a 3/4 inch pvc pipe down into the tank and the water is returned with loc-line that is plumbed back through the overflow. Would the 3/4 inch pipe be to small. Yes the intake is 1".

 

[mfinn]

I would suggest you change the intake to 1".
I just went through this with a mag 12 on a closed loop.

 

[mfinn]

Did you make a high point with which to prime the pump?

 

[mfinn]

Would the 3/4 inch pipe be to small..

The pipe on your intake is 3/4"?

 

[jmp21677]

Yes the intake pipe in the tank is 3/4 inch but only about 3ft. It swithces to 1 inch before the union and pump. Not sure what you mean by a high point. It worked without bubbles for two or three days and on Saturday i turned it off to move some things around in the tank and when I turned it back on.....Bubbles.

 

[mfinn]

You need to plump it 1" all the way.
There's a web site that has some good info on closed loop systems with out bulkheads. Going to go look for it

 

[mfinn]

Check out this.
http://www.melevsreef.com/closedloop.html

 

[jmp21677]

Thanks finn I appreciate your help.

 

[snobanker]

If any joints of your locline are out of the water they can suck some air and cause bubbles too

 

[daytonaconnecti]

hey stan, from what i have read, yes they can...

 

[jmp21677]

All line has been replumbed and air bubbles are still present. Giving up and signing off. This pump sucks

 

[mfinn]

The only thing I can think of now is, can you get detailed pictures. Fron the pump, all the way up and over the top, to down in the tank? Showing every connection, how far apart the intake is to the outlet, etc. Don't give up now.

 

[snobanker]

There must be some air trapped in the pump. I can't see how it could make the bubbles if there was no air present. Maybe the pump impellar is damaged and whipping up the water as it flows through. There has to be any easy solution, don't give up yet.