2 machine screws should be #10 self tapping and 1/2 inch long. I called the regulator manufacturer and asked what size screw it was. Somewhere in a review on another site, a reviewer wrote that the #8 screw size was 3/4" long. NOT CORRECT! Even though the screw hole is 3/4" deep, Marshal Tech Support said you need a 1/ 2" screw should be used, as you may tear off the self-adhesive 3/4" screw when it hits the bottom of the screw. Mounting hole. There are 2 installation locations. One mounting plate protrudes up, the other mounting plate protrudes down I think most installs use just one mounting plate, which comes up as a hose from the bottom of the regulator to stabilize the RV gas supply line up the bottom of the regulator.Using both mounting plates increases the ability to move the regulator when changing cylinders To move sideways, limited by the bottom mounting plate, which does not allow you to move the controller sideways.
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