Side Entry Design Pressure rating of 300psi Can accommodate any standard make of 4” Membrane Element Ultrapure/Sanitary Application: 40A comes with a specially designed 3-A style sanitary connection (optional). Key Features Mirror finish I.D for easy & quick loading & unloading of membranes. Multi-Porting option for connecting vessels to each other. High operating temperature up to 176?F. Quick lock head retention system for quick access to membranes. Exteriors coated with high gloss polyurethane paint for UV resistance. Compact design for use in compact & low energy desalinators. All components of the shell & head are constructed from materials that are FDA / NSF listed. ASME compliant & CE marking.