Why am I reading only about 1.5" w.c. for incoming pressure at propane free standing gas valve. I'm getting about 12"wc at meter next to the house. The stove is working ok, my meter is digital and accurate, with new batt's. This is the second one I have not been able to get an accurate incoming pressure reading from. When checking nat gas and propane furnaces, I'm reading correct measurements. My hose is snug around press. tap, and the screw is backed out a couple turns. Do you have to use a specific hose or meter, I wouldn't think so. Any input would help. By the way, nothing kinked between 2nd regulator and appliance and no leaks. Thank you