filter is a 1" in and out pump is a 3/4"

[Cossack1977]

the pumps i am using are 3/4" in and out.
The filters i am using are 1" in and out.

would i loose a lot of water flow converting a 1" in and out to a 3/4" in and out.

The reason i went for the 1" in and out filter is because it has a lot more internal surface area.

 

[Bignose]

water is basically an incompressible fluid. What this means, is that if you shrink the pipe, the velocity of the fluid will increase so that the same amout of mass of water flows every second.

There will be a little friction loss from increaseing and decreasing the pipe size, but it will be very small compared to the energy loss from going through a filter.

This property has been known for quite some time, with Aristotle one of the many who noticed that rivers follow this law: A1*V1 = A2*V2 = constant. That is, if A2 < A1, like when the river would become shallower or be contracted, then V2 > V1, the river's velocity at the contraction would be faster.

If, on the other hand, you were dealing with a compressible fluid, like air, contractions pose a much bigger issue -- much more energy loss.

 

[Cossack1977]

water is basically an incompressible fluid. What this means, is that if you shrink the pipe, the velocity of the fluid will increase so that the same amout of mass of water flows every second.

There will be a little friction loss from increaseing and decreasing the pipe size, but it will be very small compared to the energy loss from going through a filter.

This property has been known for quite some time, with Aristotle one of the many who noticed that rivers follow this law: A1*V1 = A2*V2 = constant. That is, if A2 < A1, like when the river would become shallower or be contracted, then V2 > V1, the river's velocity at the contraction would be faster.

If, on the other hand, you were dealing with a compressible fluid, like air, contractions pose a much bigger issue -- much more energy loss.

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Awesome.
Thats is a fantasic reply. Thats exactly what i wanted to hear.
Great explanation
Thanks