irishstout
Member
The impeller is clean. Now what?? Any other suggestions??
now what?
- Thread starter irishstout
- Start date
steamboat1569
Member
I had to find the original post to find out what you were talking about.
Put it back together, put it in the water, plug it in.
It had to be getting air from somewhere. Air bubbles don't just come out the power head while completely submerged.
Put it back and see what it does.
Put it back together, put it in the water, plug it in.
It had to be getting air from somewhere. Air bubbles don't just come out the power head while completely submerged.
Put it back and see what it does.
irishstout
Member
I have taken the powerhead apart and it is still producing the air bubbles. I can't figure it out. Sorry my last post wasnt connected to the original, dont know what happened there.
irishstout
Member
Wamp,
Turning them over worked, thanks a lot for the suggestion.
Turning them over worked, thanks a lot for the suggestion.
irishstout
Member
nevermind, they're doing it again Everything seems good, I recleaned everything and still have the bubbles any other ideas?
Everything seems good, I recleaned everything and still have the bubbles any other ideas?
david s
Member
wierd post stout the air is coming from somewere you dont have the airtube on it do you. if not and it is under water make sure it is not pulling from to of water like stated. then give it overnight to see if the air bleeds out. the air cannot just apere underwater the only other thing i can think of possibly but it is a wild guess and i doubt it. is the powerhead is geting hot enuff to boil the water lol can you cook and egg on it ???
wamp
Active Member
How far down in the tank are they? Like someone said, they can pull some air from the top but usuall only happens when they are very close to the top.
I would try shaking them in the water while they are running. They are getting air from somewhere. Also could be air from inside the sealed chamber where the windings for the motor are. They use magnetic impellars. The hole where the impellar goes in is sealed so water will not get into the wires. Could have a problem in that area.
I have no clue. I really wish I could help you more.
I would try shaking them in the water while they are running. They are getting air from somewhere. Also could be air from inside the sealed chamber where the windings for the motor are. They use magnetic impellars. The hole where the impellar goes in is sealed so water will not get into the wires. Could have a problem in that area.
I have no clue. I really wish I could help you more.
steamboat1569
Member
If this is a new pump, just take it back and exchange it for another one. Even if air was trapped inside the pump, it would run out in a very short time.
Unless there is a rip in the space/time continuum inside your powerhead, it has to get the air from an outside source to keep blowing out bubbles like that for so long.
Unless there is a rip in the space/time continuum inside your powerhead, it has to get the air from an outside source to keep blowing out bubbles like that for so long.
broomer5
Active Member
There are gasses in solution in the tankwater.
We don't see these gasses, but they are indeed there.
Oxygen, Carbon Dioxide, Nitrogen etc ......
Although I've never heard of a powerhead doing this, it does happen a lot in other types of pumps.
As glazer mentioned in the other post - there may be a situation where the pump is cavitating, or causing bubbles to implode or explode within the powerhead.
Again I've never read anything about this with our powerheads, but I too have noticed small gas bubbles exiting a deeply submerged powerhead - with no good explanation.
I think it has to do with the partial pressure of the gas, and the vapor pressure.....although again I'm not 100% sure.
The gasses in the saltwater stay in solution. I don't know why, but it has to do with partial pressure and the vapor pressure and temperature.
I guess it may be possible ( but unlikely ) that as the water with this soluble gas enters the suction side of the powerhead, it moves into the area or chamber where the impeller is spinning.
There is a pressure differential that exists within this chamber.
It has to have a pressure change. Whenever you have flow - you have to have a pressure differential from one side to the other.
Maybe as the water with this soluble gas enters this chamber, the pressure drops or changes to a point where some molecules of gas are no longer in solution. They outgas into a visible gas bubble that shoots out the powerhead - and we see it.
Ever look at a clear bottle of 7-Up with the cap still on.
You don't see any bubbles in there while it's capped and under pressure.
But you pop the cap and the CO2 bubbles come out of solution like crazy.
The pressure changed, the CO2 gas in the soda is no longer under pressure, the CO2 outgasses, and forms tons of small visible CO2 gas bubbles that rise to the top of the bottle.
Our tanks are full of gasses too, but not under pressure like in a pop bottle. But ....... anytime you change pressures and cause a pressure drop that is below the vapor pressure of a gas .... it will indeed turn to vapor.
The only way I can see a powerhead causing this is if somewhere within the pump, the pressure drops down below the vapor pressure of one of the gasses.
If this ideed happens - then it would seem possible that the gas could outgas out of solution and form a small gas bubble.
Like I said - I am not even sure this could be possible.
But the gas bubbles are coming from somewhere.
We don't see these gasses, but they are indeed there.
Oxygen, Carbon Dioxide, Nitrogen etc ......
Although I've never heard of a powerhead doing this, it does happen a lot in other types of pumps.
As glazer mentioned in the other post - there may be a situation where the pump is cavitating, or causing bubbles to implode or explode within the powerhead.
Again I've never read anything about this with our powerheads, but I too have noticed small gas bubbles exiting a deeply submerged powerhead - with no good explanation.
I think it has to do with the partial pressure of the gas, and the vapor pressure.....although again I'm not 100% sure.
The gasses in the saltwater stay in solution. I don't know why, but it has to do with partial pressure and the vapor pressure and temperature.
I guess it may be possible ( but unlikely ) that as the water with this soluble gas enters the suction side of the powerhead, it moves into the area or chamber where the impeller is spinning.
There is a pressure differential that exists within this chamber.
It has to have a pressure change. Whenever you have flow - you have to have a pressure differential from one side to the other.
Maybe as the water with this soluble gas enters this chamber, the pressure drops or changes to a point where some molecules of gas are no longer in solution. They outgas into a visible gas bubble that shoots out the powerhead - and we see it.
Ever look at a clear bottle of 7-Up with the cap still on.
You don't see any bubbles in there while it's capped and under pressure.
But you pop the cap and the CO2 bubbles come out of solution like crazy.
The pressure changed, the CO2 gas in the soda is no longer under pressure, the CO2 outgasses, and forms tons of small visible CO2 gas bubbles that rise to the top of the bottle.
Our tanks are full of gasses too, but not under pressure like in a pop bottle. But ....... anytime you change pressures and cause a pressure drop that is below the vapor pressure of a gas .... it will indeed turn to vapor.
The only way I can see a powerhead causing this is if somewhere within the pump, the pressure drops down below the vapor pressure of one of the gasses.
If this ideed happens - then it would seem possible that the gas could outgas out of solution and form a small gas bubble.
Like I said - I am not even sure this could be possible.
But the gas bubbles are coming from somewhere.
irishstout
Member
They are at least 4-5 inches from the surface so i'm sure they're not drawing from the surface, and I had my wife sew the rip in the space/time continuim up already...hmmmm. The seal being bad between the impeller housing and the windings sounds plausable. But it is happening to two of them, weird.
I wish I had gotten them locally instead of online cuz they are only a month or so old, I think I'm going to have to bite the bullet and buy some new ones. Unless the manufacturer will work with me.
Thank you for all the ideas and suggestions. I will let you know how it turns out.
I wish I had gotten them locally instead of online cuz they are only a month or so old, I think I'm going to have to bite the bullet and buy some new ones. Unless the manufacturer will work with me.
Thank you for all the ideas and suggestions. I will let you know how it turns out.
03
Member
how big are the power heads
4-5 inches from the top might be too close
look at the surface of the water for a while and see if it is in fact being sucked in,make sure you have no air stone close or around the powerheads,also see where your return is and make sure the flow isnt towards the powerheads ,its the only things it can be.they dont generate air from within,it is a outside source.
4-5 inches from the top might be too close
look at the surface of the water for a while and see if it is in fact being sucked in,make sure you have no air stone close or around the powerheads,also see where your return is and make sure the flow isnt towards the powerheads ,its the only things it can be.they dont generate air from within,it is a outside source.