Ro Membrane Help

Hello I recently purchased an RO membrane, but I am only getting waste water, I checked the pressure and im pretty sure thats not the issue, any help?

I am going to assume that you didn’t just purchase the membrane but the housing and all that you require?
if so ,was it a built your own type deal or a complete system
If it is a DIY system is it plumbed correctly, do you have a tap or valve on the waste in order to produce pure water