... ", 1/4", 1/2", 3/8", NPT, BSP or BSPT dependent on model & size. Bottom, backleft & right side connectionAVAILABLE RANGES:30Hg ... ", 1/4", 1/2", 3/8", NPT, BSP or BSPT dependent on model & size. Bottom, backleft & right side connectionAVAILABLE RANGES:30Hg ...