head pressure

[Reef_Craze]

I'm starting to plumb a new filter system for my 55g and I need to calculate the head pressure.They say a 90 degree piece adds one foot but I can't find what a T piece adds to the head pressure.
Any help would be appreciated thanks.

[mr_alberta]

Try this link:

http://www.aquaticeco.com/index.cfm/fuseaction/popup.calc_pumphead

[fishytime]

Try this link:

http://www.aquaticeco.com/index.cfm/fuseaction/popup.calc_pumphead

Hey great link ...thanks.