Why don't you have a quick google before making stupid comments?
To be honest i was always told fit the booster inbtween the filters and membranes but dont think that would effect pressure. Have you shut off the flush valve/tap??
Hi the pump is rated max 125psi 1.2lpm. I've checked the arrows on top and have it the right way round. I fitted it just before the main inlet of the ro. I am not sure how to adjust the waste I thought it was factory set!