Siphon-Absolute pressure

1. Dec 4, 2008

mchesypoof

1. The problem statement, all variables and given/known data
A flexible tube can be used as a simple siphon to transfer fluid from one container to a lower container. The fluid has a density of 800. kg/m3. See the dimensions given in the figure, and take atmospheric pressure to be 101.3 kPa.
There are three points given:

Pt X is 10cm below the fluid line in tub from which the fluid is draining.
Pt Y is 20cm above the fluid level in the tub.
Pt Z is 60cm below the fluid level in the tub.

What is the absolute pressure at point Y?

2. Relevant equations
1) ∆P=density x gravity x ∆height
and 2) Archimedes' principle

3. The attempt at a solution
I've already found the speed of the fluid in the siphon to be 3.429m/s at pts Y and Z.
From the book I derived the equation 1 and tried using both .2m and .3m for the ∆h, but to no avail. I didn't forget to add the 101.3kpa to the pressure either, and since neither of the previous two answers are correct, I'm a little lost.