Those dont sound familiar to me. Theres other guys who know more about the older membrane nomenclature but I think those are not made for maple. The xle 4040s are an excellent membrane for maple and probably a good choice for your RO because they work well with lower pressures. I still dont know what you have for pumps but the one you posted about does'nt add up as suffucient to produce very high pressures with 4 or 5 membranes. I would make sure of what exactly you have for a machine before you invest in membranes but if and when you do purchase them, get ahold of Joe at Atlantic RO (atlanticro.com). He has the best prices on RO parts and xle membranes by far. Real good guy.