Backwashing DE without a backwash setting on my valves?

Oct 6, 2021
6
Riverside, CA
Pool Size
17800
Surface
Plaster
Chlorine
Liquid Chlorine
Hi all, recently got my pool redone including new plumbing/filter/pump. I think it's time to backwash my Pentair QuadDE 60, but I don't have one of those wonderful valves with a dedicated "backwash" setting, which seems to be what's shown in all the stuff I've read so far. I've attached photos of my set-up. How would I go about backwashing this puppy? You'll see that, to dummy-proof our plumbing apparently, our builder took off the handle from one of the valves. I'll be fine putting it back on.

Thanks all, as always.
 

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Texas Splash

Mod Squad
TFP Expert
LifeTime Supporter
Jun 22, 2014
33,620
Texas, San Antonio/Marion, South-Central Area
Pool Size
17888
Surface
Fiberglass
Chlorine
Salt Water Generator
SWG Type
CircuPool RJ-45 Plus
With no multiport valve of plunger/slide valve, you can't backwash. Perhaps your builder expected (assumed) you would dismantle the filter each time the grids required cleaning? Some DE owners do that, but to not have either valve available seems like a disservice to you if you would like to cycle water directly to WASTE or something.