Will I lose pressure???

[mekoi]

Hi Guys/Gals

Just wondering how much pressure will I lose if I ran my Hi Blow 100 from 9mtrs away from my pond Air pump will be supplying air to BD and Biofilter. My BD has a add on rubber diffuser. I will be using 20mm pressure pipe and a few elbows but most runs are straight.

Any help will be greatly appreciated

rgds,
Jon

[B.Scott]

Mekoi,
If I remember correctly... Pressure loss is the inverse of the square of the speed the substance travels in the pipe pipe used. In plane language, if you in increase the flow it doubles with each increment. Make the pipe large and you reduce the flow and pressure loss. It doesn't even matter much if you start small and then go large. I find the best way is to replace any straight and hidden lengths of air pipe with 1" PVC pipe and only use the hose where you really need it. PVC is cheaper too!.
B.Scott

[junglegeorge12]

things like that are pump specific too.

The main loss is not due to pipe sizing, but small leaks and friction along the pipe walls. Air in general on a smooth surface does not have too much friction loss, but is does have some. 9 meters is about 30ft. 20 mm is about 7/8".

I think your pressure loss will be minimal, it is actually water depth that will affect you more.

there are some online sources for it, goggle engineering calculators, you can then find your spoecific pipe and diameter and it will tell you what losses you will be looking at.

May I ask why you are running it that far? To draw air from inside?

[mekoi]

Quote: Originally Posted by B.Scott Mekoi, If I remember correctly... Pressure loss is the inverse of the square of the speed the substance travels in the pipe pipe used. In plane language, if you in increase the flow it doubles with each increment. Make the pipe large and you reduce the flow and pressure loss. It doesn't even matter much if you start small and then go large. I find the best way is to replace any straight and hidden lengths of air pipe with 1" PVC pipe and only use the hose where you really need it. PVC is cheaper too!. B.Scott

Hi B.Scott

Thanks for the tip. I will try to minimise the bends or maybe use flex hose. A mate of mine gave me two 6mtr lenght of pressure pipe, might as well use it

rgds,
Jon

[mekoi]

Quote: Originally Posted by junglegeorge12 things like that are pump specific too. May I ask why you are running it that far? To draw air from inside?

Hi JG,

My air pump has this humming noise(kind of irritates me a little) and it does get wet every now and then but don't worry I have a cover for it. Probs with the cover it does heat up a little so ventilation is insufficient. If I place the air pump in my shed I don't have to worry about anything

rgds,
Jon

[junglegeorge12]

You don't have to move it.

Go to walmart, get a few sheets of 1" pr 2" thick styrofoam and a can of paint the color you like. Take the old housing off, glue the sheets into a little house, cut some vents in the sides, and you are done. The styrofoam is cheap, and will absorb the noise. It is water proof as well. If it does not reduc ethe noise enough, put sheets around the pump inside the house as baffles so the noise has to go over it and back down to escape. Some sheds can act like speakers and make the noise worse.

[mekoi]

Hi George,

Very good idea but I should also add the other reason why I want to move it. My sump pit is really tight as it is, I have a shelf to accomodate the air pump witch madeit worst so in other words I'm crating a bit room as well. I did run the air pump in my shed and it didn't make it worse it was so nice not hearing the humming too, that's why I'm thinking of moving it in there

rgds,
Jon

[maryland_ponder]

Be careful if you use the styrofoam it is an excellent insulator & can cause a heat problem in the motor if you do too good a job of sealing it up!

Quote: Originally Posted by junglegeorge12 You don't have to move it. Go to walmart, get a few sheets of 1" pr 2" thick styrofoam and a can of paint the color you like. Take the old housing off, glue the sheets into a little house, cut some vents in the sides, and you are done. The styrofoam is cheap, and will absorb the noise. It is water proof as well. If it does not reduc ethe noise enough, put sheets around the pump inside the house as baffles so the noise has to go over it and back down to escape. Some sheds can act like speakers and make the noise worse.

[mekoi]

Hi MP,

Very good point I think it's still better if I place my air pump in the shed without the orig cover to avoid heat problem

rgds,
Jon

[B.Scott]

Jon,
Pressure pipe is fine but at the pressure you will be working at not especially necessary.