M3AN ONE yes, most emitters can only handle 40psi or less for a true reading or even failure blowing off or breaking.... if ur running through an RO it should be slowing down ur water pressure significantly. With a gauge there, u will able to monitor it already. I don't use RO or treat my water. My house pressure is 80+psi so id blow emitters pretty quickly without regulation. you only need around 5-10 psi to power an emitter properly. id imagine the RO should be putting that out no problem unless the filters are clogged. you can also use any erray of PVC, brass etc. fittings that u can combine together. dont have to lock urself into just push connect. you can buy thread in push connect ends and add them onto a pvc or brass gate/ball valve or whatever you need with teflon tape. I use all of the above.