Pre-Plumbed Fittings Kit for 3-Stage Big Blue System with 55 W UV – 32 mm / 1-Inch

The Pre-Plumbed Fittings Kit for 3-Stage Big Blue Systems with 55 W UV provides the prepared pipework needed to connect a three-stage filtration unit to a compatible ultraviolet steriliser. It is ideal for installers, system builders and customers who already have the filter housings, mounting frame and UV unit but want a neat, serviceable plumbing arrangement without fabricating every connection from loose fittings.

The kit is supplied as three pre-plumbed assembly sections incorporating 32 mm PVC pipework, unions, isolation valves and threaded connections. The prepared sections screw into the corresponding filter and UV connections, reducing on-site pipe cutting and solvent welding while retaining unions for future servicing and component removal.

Suitable Applications

• Completing a new three-stage 20-inch Big Blue filtration system with a 55 W UV steriliser
• Upgrading an existing three-stage installation to a cleaner pre-plumbed layout
• Replacing damaged or poorly configured interconnecting pipework
• Installer-built borehole, rainwater, whole-house and light-commercial filtration systems

Key Features

• Three prepared and glued pre-plumbed assembly sections
• 32 mm PVC pipework
• Integrated isolation valves for improved maintenance control
• Union connections for easier assembly and servicing
• Threaded ends prepared for screw-in installation
• Reduces complex on-site pipe fabrication and installation time
• Matches the fittings arrangement supplied with the H2OW1431 filtration system

Compatibility

• Designed for standard three-stage 20-inch Big Blue filtration units paired with a 55 W UV steriliser
• Suitable where the housing ports, UV chamber connections, component spacing and pipe alignment match the supplied assembly
• Installer must confirm thread sizes, port orientation and centre-to-centre spacing before ordering

Important: Three-stage systems and 55 W UV sterilisers can differ between manufacturers. Compatibility should be confirmed from the actual connection sizes and layout rather than UV wattage alone.

What You Get

• 1 × Complete pre-plumbed fittings kit comprising three assembly sections
• Prepared PVC pipe sections, unions, two isolation valves and threaded connections as photographed

Not included: Big Blue filter housings, cartridges, mounting frame, UV steriliser, UV lamp, ballast/controller, electrical components or installation labour.

Installation

• Dry-fit the assemblies and confirm alignment before final tightening
• Use a suitable thread-sealing method on threaded connections
• Avoid overtightening plastic threads and union nuts
• Support the UV chamber and pipework so that the fittings do not carry excessive weight
• Leak-test the completed system before commissioning

Professional installation is recommended where the existing system configuration or connection sizes are uncertain.

Installation Guide

Download the illustrated step-by-step guide for identifying, orientating, fitting and commissioning the pre-plumbed assemblies.

Download the Pre-Plumbed 3-Stage Big Blue + 55 W UV Installation Guide (PDF)