I have a question regarding gas pressures for the Hayward H250FDN. We're on 2 psi and I'm going to use a Maxitrol 325-5AL 1 inch regulator. It's taking the 2 psi down to 7-11 inches water column and gives me 300k btu/hr. The manual on the hayward says 10.5 inches water column max inlet pressure. Is this OK or do I need a second press reg to bring it down further to say 4 - 6 inches water column? Or will the reg built in handle the slightly elevated pressure?