Several things. First you are not understanding the pressures your Spectra is creating or the parts
creating it. The Spectra Ventura does create around 750-800psi inside the membrane vessel. All salt water
RO systems do. The 80psi you are referencing in your system is the feed pump pressure not the membrane vessels pressure. A membrane vessel rated for 200-300psi is for a fresh water RO system and can not take the pressures created in a salt water
RO systems. Also, if this is a Ventura 150 or 200T there is only one 21"membrane vessel not three. Secondly, before you start throwing the baby out with the bath water, it would be far cheaper to repair your older 21" membrane vessel than replacing it. Spectra membrane vessels are the easiest vessels made to work
on and repair. If you are leaking somewhere from the end cap or fitting it's less than a $100 to fix. I would suggest that you contact me first before making any descision on what to do or how to repair your Spectra watermaker. Because, with all due respect, your original post tells me you do not fully understand your system or it's components. A few minutes on the phone
with me costs you nothing. Feel free to contact me anytime.
Halden Marine Services | Marine Watermakers, Solar Panels, Wind Generators