DE Filter Pressure pressure RPM

[soleen]

The DE Filter pressure changes with pump RPMs, which makes sense. The question is at what RPM should I measure my initial pressure after backwashing?

Currently, my pump is running 20hours at 2000RPM, and 4 hours 3450RPM. (I am still new to the pool, and may need to adjust that).

 

[mknauss]

What is the pressure reading at 2000 rpm.

 

[JJ_Tex]

I always turn my pump high (~2,400 rpm for me) when recharging the DE, so I just look at the gauge after I've added all of the DE and use that as my starting point for clean pressure.

Since it is a % increase in pressure that tells you when you need to backwash, it really shouldn't matter as long as you are consistent in your RPMs when comparing clean vs current pressure.

 

[Jimrahbe]

S,

You have a saltwater pool, so your slowest speed should be whatever turns your cell on, plus a little bit.

I have no spa or heater and run at 1200 RPM, most of the time.

I can't think of any reason that anyone needs to run their pump at full speed.. (3450 RPM)

Thanks,

Jim R.

 

[soleen]

What is the pressure reading at 2000 rpm.

10psi

 

[mknauss]

You can use that rpm. Plan to clean at between 12 and 13 psi.
Your operating rpm can likely be lower.

 

[soleen]

S,

You have a saltwater pool, so your slowest speed should be whatever turns your cell on, plus a little bit.

I have no spa or heater and run at 1200 RPM, most of the time.

I can't think of any reason that anyone needs to run their pump at full speed.. (3450 RPM)

Thanks,

Jim R.

I have a lot of pines around the pool, and needles are floating on the surface. For some reason at 2000rpm not all needles get to the skimmers. So, I run 4 hours at higher speed to resolve that.

The leaves and needles that sink are picked up by dolphin m600 cleaner.

 

[Jimrahbe]

S,

Do your skimmers have operating weir doors??

Thanks,

Jim R.

 

[reggiehammond]

And do you have a main drain that you can close off? 90-95% closed will send a lot more flow to skimmers, resolving the need for higher pump speeds.