Abstract: A spray gun construction, comprises a housing part which is interconnected with a container part at its front end and a handle part at its rear end which has an actuating button. The housing part has a suction bore and a return bore located in fixed spaced apart relationship and a spray nozzle and surge chamber member which has a suction line connection which extends into the spray bore and a return line connection which extends into the return bore which alone or in combination with other pin and peg arrangements permit interconnection and alignment of the nozzle with the associated surge chamber on the housing in connection with a container or reservoir member containing the liquid to be sprayed.