you say it won't roll..is this an auto vac? does it have a regulator attached to the hose that you can control the suction with? i've had that problem with both an autovac and manual. especially with the manual as it had no regulator. in my case, i've got a main drain return and skimmer return so i can simply open the main drain a bit to reduce the suction. not as convenient as a regulator on the hose. i have been considering installing a valve that allows some air to get into the vacuum line going to my skimmer (as is the case on the auto vac line) and that would work great.