tuna fisher wrote:
I belive horz. tanks are excempt from the OPD valves.
PORTABLE HORIZONTAL (portable as in not permanently bolted and plumbed to the RV)are not "exempt" unless they are FORK TRUCK tanks (which by the way already have OPD built in). Fork truck tanks however most likely does not have DOT approval for uses other than FORK LIFTS. I believe fork lift tanks are also aluminum which would make then extremely expensive..
Portable horizontal tanks are designed to mount in ONE specific direction so the "dip tube" inside always faces UP. You can not simply take a vertical tank and lay it on the side nor can you use a horizontal tank standing up.
I am painfully aware of the dreaded horizontal portable tanks, which do not have OPD. Any filling station caught loading one of those tanks risks losing their entire business therefore they will not fill them.
I HAD a pair of horizontal 30 lb tanks, NO ONE WOULD FILL THEM, in the end it was cheaper to buy new vertical tanks, tray, cover and be done with the mess.
