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.