Well, I did finally get a new 2 speed pump. My old pump was a Hayward 1HP, single speed unit that was installed with the pool 2 years ago. My new pump is a Waterway 1HP 2 speed pump, I think very similar to FPM's waterway pump. My whole intent with the new 2 speeder is to put it into its low speed and just let it run like that with the hope that it keeps the water moving enough to keep the heater operating. I got a friend to swap the pumps for me and the new pump is running. I have some questions though if anyone can help?
*the clean system pressure with the old pump ran about 14 right after cleaning, with the new pump at the high speed its about 11, and at the low speed it reads 0! That 0 concerns me, although even when its reading the 0 I can see and feel that water is circulating and the heater is staying on like I wanted. Should I be concerned?
*The water level in the pump strainer basket seems to fall a bit after the pump has been running at the low speed for a long time. Backwashing seems to be the only way to fill the strainer all the way back up again. Any ideas why it is behaving this way?
*At the low speed, the heater does keep running, but sometimes it makes a whining noise while running that I have never heard it make before. Again, it seems to be operating ok, but it makes me nervous none the less.
The new pump didn't come with any literature. Even if it did I'd still want advice from you guys as you have always steered me right! So what do you guys think? Should I be concerned about any of this? Did we maybe do something wrong when we installed the new pump? Or is this the way a pump should behave when operating at low speed? All advice is appreciated!