I have not taken apart this filter. We moved here in Dec and my husband was home when the pool was opened in May so I didn't see anything. The backwash lets the water run out through a hose and it bubbles up in the back of the yard - like a little fountain, we were shocked. The hose is hidden underground. It is a sand filter, and we have never had a sand filter. I looked on u-tube how to use this system. This is the site I found that has our exact filter. How to Use a Multiport Valve on a Sand Filter - I haven't had time to watch the entire thing though. Our old pool we had was chlorine for just 2 seasons and then we switched to salt b/c we had so many issues with chlorine and no issues with salt. It was a DE filter and I understood how to backwash it to change out the DE. This system with the pool now, I never had a multi-valve - and before (old pool) we had to take the filter apart and hose out the cartridges. Not sure how this system works though.
Thanks
Jen
Thanks
Jen