Hey Hpdad and to all, I bought the 16" 2650 gph intex sand filter, filled the sand a little under the max fill line and I'm getting the same thing. It started and has been just a hair under 10 psi, which is bordering the yellow mark. I've read some other sites this seems to be normal for most. Like others said this will be our "Clean PSI". I bought the big sand filter mainly because it was on a great sale so why not go a little bigger, I was ready to spend 250-300 at the local pool store so when I saw this for under 160 meh, the next one I get will be bigger so I'm thinking ahead I guess. I have the 15 X 48 intex round and there's no way I could run it for 1-2 minutes "PLUS" rinse for 1 minute, the first time I tried it drained just over 1/3 of the water. So to anyone with a smaller pool we will just have to backwash more often, it's working great. I backwash and rinse for 20-30 seconds once every 1-2 weeks depending on debris / storms I have a lot of trees around, being were all outside in the yard anyway it's not a big deal. Take care good luck have fun.