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Comparison : Item # 119B-1PP, 100 Series Check Valves 0 to 25 psig
Item # 119B-2PP, 100 Series Check Valves 0 to 25 psig
Item # 119B-3PP, 100 Series Check Valves 0 to 25 psig
Item # 119B-4PP, 100 Series Check Valves 0 to 25 psig
Item # 119B-6PP, 100 Series Check Valves 0 to 25 psig