deep cleaning filter

If I wanted to deep clean my filter and I left the multiport head on. Turned it to backwash had a hose running into upturned hose in the intake would this be doing the same kind of thing. See the Diagram That should be doing the same things. The location of the sand filter is not somewhere I...

is there a specific way to deep clean a sand filter?

I have an Intex Sand Filter that I took apart and cleaned. Every inside piece was cleaned thoroughly and then reassembled. I purchased new filter balls (used them last year with excellent results) and added those. I must have done something wrong when I reassembled the insides to the filter as...