I called Hayward again, and this time received a different answer from their technical support. At first I was given the same answer as the previous support agent (basket should be full to lid). I mentioned this forum as a example of owners not seeing this operating performance.
I asked how to have a Hayward rep come to my house and look at the install. After a brief moment on hold I was joined by 2 additional technicians who supposedly helped do the testing and verification of these pumps.
In a nutshell I was told: "Due to friction from the plumbing, at very low speeds the impeller will not move enough volume to overcome the friction. Because of this an air pocket will form and result in a drop in water level in the basket."
I was, however, "assured" it will never drop below the level of the bottom of the suction side line input.
I asked them if they have anything written about this, such as training aides for Sales etc....nope nothing nada.
So either BS, OR this is the actuality of VSP's. It seems as though the Ecostar is not the only VSP seeing this.
What do you all think? :?: