Picked up an additional "debris pump" 1.5 hp, how much suction should i be feeling?

Jun 14, 2016
3
boston, ma
Picked up an additional "debris pump" 1.5 hp, how much suction should i be feeling?

Picked up a Harris H1572730 ProForce 1.5 HP pump as an external vegetation pump, to pick up the heavy stuff and bypass my filter. I was following this tutorial on youtube:
How to make a Portable Clean-Up Pump to Vacuum out a Pool - YouTube
I attached my old hose to the intake and a vinyl hose to the outake, primed it, and then it sucked out the primed water, but filled it with just air. I took off the input hose and put my hand on the adapter and felt a very small suction, it should pull on my hand quite hard right?
 
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