PB blaster or liquid wrench
try one of the above on the threads and let it soak in to avoid putting too much strain on the whole assembly. From the mess the PO created, it's hard to tell if there is a true seacock there or not
try one of the above on the threads and let it soak in to avoid putting too much strain on the whole assembly. From the mess the PO created, it's hard to tell if there is a true seacock there or not