The male coupler is designed for use with hand pumps. This coupler has a barbed end for attaching to vinyl tubing. Used with hand pumps, this barbed-end connector fits our tubing/hose. Push in coupler to attach the pump hose to the female coupler on a cylinder.
The female coupler is designed with a threaded end. This connector screws into the top of our cylinders to attach to a male coupler.