Tunze Hydrofoamer 9400.040 issue?

[raynist]

Bought one of these for my euroreef 250 and hooked it up. Checked the air flow with a Dwyer meter and am getting 5 lph of air. Does this sound right? I was expecting 3-4 times that.

Thanks
Ray

 

[raynist]

Actually it is between 5-7 lpm which would be 300-420 lph or 10-15 SCFH.

I thought the Sicce pumps did about 28 SCFH and this was a modified Sicce pump?

Does this all sound right? I think I am actually pulling in less air than the stock pump.

Does it need to break in or something?

--Ray

 

[rvitko]

You should be getting about 800 lph with the included hose and silencer being used and the pump right side up and just barely submerged. Sicce doesn't make a needle wheel pump, various companies buy the Sicce motor and create their own needle wheels. Sicce only makes the motor, it is the internals of a pond pump. Ours does about 800lph of air but if the air input is restricted or a smaller size it will be substantially less, the same will apply to any use of elbows, hoses or added plumbing to attach the pump or submerging it deeper.

 

[raynist]

Thanks Roger. I took the unit off of the skimmer and used a slightly larger diameter tube and it pulled right around 800lph.

There is a 90 degree bend to get the water into the skimmer, maybe that is causing some backpressure? I will play around with it this weekend to get a more efficient path into the skimmer.

When you say pump side up, does that mean the intake of the pump pointing up or pointing down?

Thanks!

 

[rvitko]

Intake pointing down but the pump should be just barely submerged, so that the top is under water 1" or less.

 

[raynist]

<a href=showthread.php?s=&postid=13106841#post13106841 target=_blank>Originally posted</a> by rvitko
Intake pointing down but the pump should be just barely submerged, so that the top is under water 1" or less.

Ok, that should actually be pretty easy to do.

Since I have a slightly larger tubing for the air intake should I use that or is the one that came with it better?

 

[rvitko]

I think if it is slightly larger it should be fine as long as no couplers are used that are constricting.

 

[raynist]

Hi Roger,

I took off all of the bends in the plumbing to get a straight shot from the pump into the skimmer and my flow went up to about 900lph. When I adjusted the water level in the skimmer to the height I needed it dropped to about 600-650 lph, does this sound about right?

I don't have the water level at the best height. With the intake of the pump down, the water level is at best half way up the motor of the pump. Does this make a difference?

Thanks!
Ray

 

[rvitko]

I would try to get the water level on the pump a bit higher, at least 2/3rds submerged. What you describe sounds about right. With the pump only half way submerged it tends to run louder and with some cavitation due to air building up in the impeller well.