Pump Pressure with and without solar running

[kr8434]

I have a Hayward control switch which can redirect water to the roof to be solar heated. When I run with solar heating, my cartridge filter PSI is around 10-12. When I run without solar, PSI drops to 2-4.

How should I think about what the "right" pressure is with and without the solar heating turned on? I don't always have solar heating turned on, so it's not unusual to be running at that low PSI, and it seems too low to me.

Thanks.

 

[Jimrahbe]

kr,

Is the pump running the same speed when running with solar and without solar??? I would have thought it would be 10 without solar and 20 when using solar...

But, I don't have a solar system, so lets see what our other members have to say..

Calling @pooldv

Thanks,

Jim R.

 

[kr8434]

I believe it’s running the same speed.

 

[jimmythegreek]

What hayward control do you have and what pump do you have? Do you have return eyeballs in the pool returns?

 

[pooldv]

It is normal and expected for the pressure to increase when solar is on. There is no right or wrong pressure in pool plumbing. It just is what it is.

 

[Jimrahbe]

Thanks pooldv,

I read the OP's post backwards... I thought he said his pressure was going down when in the solar mode, which did not sound right to me..

Glad to know it is working as it should..

Jim R.

 

[kr8434]

Thank you all.