Hayward Pump questions

[rhosk]

Hm, this thread has strayed off topic, but as usual, I'm learning more and more!

However, 17 PSI should be more than enough pressure to close the VRV and prime the panels unless there is a lot of head loss between the filter and VRV. What size pipe do you have going to the panels? Where is the VRV located?

I have about 40 feet of (2") PVC level ground, then the 25' rise to the panels, then the same returns. The VRV is at the top most position of the panels.

Sometimes you can move the valve to the supply side of the panels so it closes off easier.

This sounds interesting. I may have to try this.

[mas985]

My main point in addressing the pressure issue is that you would be better off energy wise with the 3/4 HP pump as long as you can get it to work properly. If you can move the VRV, you may not need to have the washers in the return in order to use a 3/4 HP. This will also improve the efficiency of the setup.

The VRV can be installed almost anywhere down to a few feet above the pad but on the supply side only. Some installers will put it a few feet above the pad so it is easily accessable for replacement. This works well for two speed pumps on low speed but is not recommended for very hot climates where the water can sit in the panels and heat up enough to soften PVC.