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predator · 03-17-2008, 10:06 AM

Ok so... I should know this seeing that i have the whole engineering back ground and what not, but here goes...

Ok in a closed loop sytem such as a canister filter do you even have to worry about head on the pump?

I get that if you have an open sump there is pressure pushing back against your pump as it forces water up the tward tank hose...

BUT in a closed system... ther is pressure pushing down with the same force from both the pump inlet and outlet... These pressures should equalize things out therefore (virtually) eliminating head... TRUE?

Im asking this because i was trying to look at somethign and someone had an 8 foot head and he put 2 canisters in series with each other to defeat the head... but it was a closed system so i was kinda thinking "what head?"....

I do realize that ther will be more pressure on the pump outlet side of the system due to elbows, heaters, uv filters, spray bars, and what ever else you run it through...

-me

03-17-2008, 10:06 AM	#1
predator Pirates get all the booty Join Date: Jan 2005 Location: Little Rock, AR Age: 25 Posts: 222 User Feedback: (0)	Head in a closed loop system? Ok so... I should know this seeing that i have the whole engineering back ground and what not, but here goes... Ok in a closed loop sytem such as a canister filter do you even have to worry about head on the pump? I get that if you have an open sump there is pressure pushing back against your pump as it forces water up the tward tank hose... BUT in a closed system... ther is pressure pushing down with the same force from both the pump inlet and outlet... These pressures should equalize things out therefore (virtually) eliminating head... TRUE? Im asking this because i was trying to look at somethign and someone had an 8 foot head and he put 2 canisters in series with each other to defeat the head... but it was a closed system so i was kinda thinking "what head?".... I do realize that ther will be more pressure on the pump outlet side of the system due to elbows, heaters, uv filters, spray bars, and what ever else you run it through... -me __________________ He spoke with the wisdom that can only come from experience, like a guy who went blind because he looked at a solar eclipse without one of those boxes with a pinhole in it and now goes around the country speaking at high schools about the dangers of looking at a solar eclipse without one of those boxes with a pinhole in it.