For years I had a hayward gas heater...everything worked great. It went out, so I just plumbed it out of the loop for about 2 years. I've now installed a Pentair max-e-therm 400 (r2d2) and it seems that my arneson pool cleaner (suction) isn't working as well. Also after cleaning the de filter and recharging it, it used to run under 10 lbs. of pressure, and now it's always higher than it used to be. My question is, has anyone run into a problem like this? Could this heater cause a restriction? I bought it brand new. Thanks in advance! Herb