Cocks for water for heating/cooling systems and not dangerous gas

Ball cock, male-male connections
Ball cock, female-male connections
Ball cock, female-tail piece male connections
Ball cock, female-tail piece male connections
Ball cock, male connection-hose connection
Ball cock, male connection-hose connection
Ball cock, male-female connections
Ball cock, male-male connections
Ball cock, female-female connections
Ball cock, male-base adaptor connections