Trident Marine Straight Thru-Fitting for LPG Line. Meets ABYC Standard for non-abrasive, vapor tight (non-pressurized) seal of continuous length of LPG supply line passing "Straight-thru" water tight bulkheads and decks from inside cylinder locker to each appliance. Slides over and seals around Trident LPG hose assemblies (except #40407 & 42421) through bulkhead or decks up to 1/2" thick. 3 piece nylon construction with lock nut & BUNA-N sealing gland resists salt water, fuels, weak acids and common solvents. Properly installed, it will withstand up to 70 PSI water pressure and working temperatures -22 to 212?F . Cut 1.35" hole to install.