Received the replacement pump/venturi/volute last week and installed them, unfortunately the skimmer is still making the same noise. The new pump is also loud (couldn't hear the old one running), noticeable whining sound when it ramps up or down and a constant loud hum that can be heard a distance from the tank (sump is enclosed in the stand).
Very disappointed as I was hoping the new parts would go in and work beautifully. Sent another email, no idea how they'll want to handle it from this point...
Received the replacement pump/venturi/volute last week and installed them, unfortunately the skimmer is still making the same noise. The new pump is also loud (couldn't hear the old one running), noticeable whining sound when it ramps up or down and a constant loud hum that can be heard a distance from the tank (sump is enclosed in the stand).
Very disappointed as I was hoping the new parts would go in and work beautifully. Sent another email, no idea how they'll want to handle it from this point...
I sent you a pm Kole just an idea
In essence these chugging pumps make the most sense if they are not getting proper water suction either via too much air too quick or whatever. They are starved for water so you have to turn your attention to everything around the pump and the suction/Venturi fitting.
One thing that I did as I was reinstalling the skimmer after a cleaning is to absolutely make sure the suction/venturi portion of your assembly is in the hole. It sounds silly but because the pump/POV assembly doesn't have a way to attach it to the btm of the skimmer to insure alignment. The entire bottom of your skimmer is the water inlet.
My .02
kris4647 said:I think when it goes into these outbreaks instead of taping it off I'd replace the black cap and use your finger over the other venturi to drive water into the pump area. Slowly peel your finger off the intake. I've done it several times.
You can sorta see it in your head(sounds dumb) but if the wheel is in a pocket of air it lurches due to no resistance. Then it's going fast and blows the next slug of water out. There's no smooth pull of air into the water and constant flow.
It has to be starving for water.
I've tried fiddling with the pump to make sure it is sitting right. Haven't seen a difference.
Just spent a half hour trying out that priming method in every way possible. But it didn't work. :-(
It quieted it a bit, but did not completely stop the chugging. I thought it would work, your explanation made perfect sense.
I appreciate the help though.
If you look back up the thread, you will see I have the exact same "chugging" problem. I've suggested to Jeremy that the venturi may be incorrectly sized but I don't think he converses on design issues. Note: I have had two Octopus Bubble Blasters and they have had significantly different venturi specifications for the same model (and did not produce the same results). Quality control?Anyone have caliper dimensions for the venturi air and water orifices on a properly functioning DC-1 skimmer?
Do you think the DC1 would be good for a cadlights 50G? How about the omega 120(or 130 I can't remember) that still isn't out yet.