How do folks backwash?

[SL Dan]

Thanks, i was entirely unsure if I had it in the right place.

My filter is a Purex (Pentair) 2000, 36 sq. ft. The pump is a Pentair Whisper-Flo (anything but), 3/4 HP.

I'll be damned if I can figure out where the various pool guys backwashed to. Maybe they had their own backwash hoses.

[PoolDoc]

Looked at some old drawings; I'm fairly sure that's not really a back-washable filter. It's no longer made, so I can't find a manual, but I would imagine the service guys just opened it, and a port or drain at the bottom, and washed it down.

DE powder is find in garden soil; you just don't want it blowing around and getting into your lungs.

[SL Dan]

There's a whole rig on bottom where, in one position it's normal and the other it says backwash.

Can I add a few images?

[PoolDoc]

Sorry; can't help.

I've never been around that filter, and didn't see a manual online.

[SL Dan]

This is what I have:

https://www.manualslib.com/manual/12...te%20SM%202036

[PoolDoc]

Looks like that manual is only partially readable? And, I assume you do NOT have the associated separation tank?

Still, with my limited experience with residential pressure DE filters (most of the DE filters I've worked with were giant commercial vacuum DE filters), it's worthwhile to periodically break down the filter. Unlike sand filters, backwashing DE filters only seems to work partially. Full cleaning requires opening the filter, ESPECIALLY if you haven't done so in a while.

[SL Dan]

I've done it 4 or 5 times so far this year. And right, I don't have the separation tank. Until I DL'ed that manual, I didn't even realize there was a separation tank. This filter was gotten by our last pool man.

But I'm wondering what most people who have DE filters do with waste water/DE/algae when they backwash.