Hello. Below are 2 different pump hoses for Petromax. The top one is from a Petromax 826 F. Racek. The pump hose is also longer for the F. Racek. As you can see on the top tube, a regular Primus NRV fits it, but it does not fit the bottom one. Can anyone here at CPL tell me the thread size of the NRV on the F. Racek tube? Thanks in advance.
