Products
Engineered for pressure.
Built for every port, every PSI.
From FRP pressure vessels to flexible couplings and cartridge filtration systems, First Line engineers every component to perform reliably in desalination, ZLD, mining brine recovery and municipal reuse projects.
2.5″-8″+
STANDARD DIAMETERS
OTHER DIAMETERS
ON DEMAND
150-2000
operating psi
+1M
UNITS SUPPLIED
Pressure Vessels
Filament-wound FRP vessels for reverse osmosis membranes. Select the tab by diameter to see the information.
Connection Type
End Port
End Port
Side Port
End Port
Side Port
Beyond the standard 2.5″, 4″ and 8″ lines, First Line manufactures special diameters to customer specification — including 16″ and multi side-port configurations.
Contact engineering to review feasibility, lead times and documentation for your custom diameter.
Membranes per Vessel
14 inch, 21 inch, 40 inch
Contact engineering for membrane configuration on custom diameters.
Technical documentation
Contact engineering for documentation on custom diameters.
Cartridge
Pre-treatment filtration solutions that protect downstream membranes and
extend system life, available in a full range of capacities and configurations.
Cartridge housing
Suitable for Pleated filters
Cartridge filter
Pleated filters
Couplings
Precision-engineered connectors that ensure leak-free, high-pressure performance across vessel arrays — designed for long-term reliability under continuous operating stress.
Low Pressure Couplings
Main Material:
Nylon
Application:
Low pressure, cartridge filter housings (150 PSI).
Low Pressure Couplings
Main Material:
SS304-SS316
Application:
Low pressure, RO Pressure Vessels (300-450PSI).
High Pressure Couplings
Main Material:
SS2205-SS2507
Application:
High pressure, RO Pressure Vessels (+600PSI).
Super-High Pressure Couplings
Main Material:
SS2507
Application:
High pressure, RO PVs
Pressure: 1200-2300 PSI
Skids
Fully engineered, plug-and-play skid systems, integrating vessels, filtration, and piping into a single, factory-tested unit ready for fast on-site deployment
Quality & Certifications
Manufactured in China, certified to the standards required by water treatment projects worldwide.
Need a specific configuration?
Our engineering team can confirm availability, lead times and technical documentation for any combination of diameter, connection and pressure — including special sizes on demand.
Hi! Can we help you?
At First Line we offer a direct channel for your commercial and technical questions. Use the form below or contact us by email or phone for personalized service.
Email us
customer.care@firstline-global.com
Call Us
+34 678 420 132