Filter flow question

[bk]

Trying to increase the flow from the filter back tot he pond. Increased
return pipe by 1/4" diameter. The filter is a canister type tetra PF3.
Currently the disarge pipe in about 8-10" below the water surface. Can this
slow the flow rate?

[george]

"bk" > wrote in message
...
> Trying to increase the flow from the filter back tot he pond. Increased return
> pipe by 1/4" diameter. The filter is a canister type tetra PF3. Currently the
> disarge pipe in about 8-10" below the water surface. Can this slow the flow
> rate?

It will have an affect (even if only slightly, at the depth), because it is
placing a hydrostatic head on the pump that it has to overcome. Most pumps have
charts that come with them in the manual that tell you what the rated output is
for a given amount of head. At that depth, it should not have too great an
affect on the pump

[Sean Dinh]

Since his filter is a TT type, the pump does not come into play for draining
purpose. However, your explanation still apply to the drain from the filter.
Draining should be slower because it take energy to move the water at the outlet.
t's only gravity flow from the bottom of the filter into the pond. He should open
his filter and see how much water back up on the bottom. If water back up 1/4 of his
TT, then he should be concerned about drain flow.



george wrote:

> It will have an affect (even if only slightly, at the depth), because it is
> placing a hydrostatic head on the pump that it has to overcome. Most pumps have
> charts that come with them in the manual that tell you what the rated output is
> for a given amount of head. At that depth, it should not have too great an
> affect on the pump

[bk]

Back up is greater than 1/4 of filter. So I'm thinking of adding another
drain spout.
"Sean Dinh" > wrote in message
...
> Since his filter is a TT type, the pump does not come into play for
> draining
> purpose. However, your explanation still apply to the drain from the
> filter.
> Draining should be slower because it take energy to move the water at the
> outlet.
> t's only gravity flow from the bottom of the filter into the pond. He
> should open
> his filter and see how much water back up on the bottom. If water back up
> 1/4 of his
> TT, then he should be concerned about drain flow.
>
>
>
> george wrote:
>
>> It will have an affect (even if only slightly, at the depth), because it
>> is
>> placing a hydrostatic head on the pump that it has to overcome. Most
>> pumps have
>> charts that come with them in the manual that tell you what the rated
>> output is
>> for a given amount of head. At that depth, it should not have too great
>> an
>> affect on the pump
>