Housing Spanners

Housing Spanners are essential tools designed to tighten and loosen water filter housings during installation or cartridge replacement. Whether you’re working with Slimline, Big Blue, or inline filter housings, the correct spanner ensures a secure fit and makes maintenance easy, safe, and efficient.

Available in various sizes and compatible with most 10" and 20" housings, our spanners are made from durable reinforced plastic or heavy-duty polymer, ensuring long-lasting use without damaging the housing. These tools are a must-have for both home users and professional installers.

This collection includes:
• Slimline Housing Spanners – For 10" & 20" standard cartridges
• Big Blue Housing Spanners – For larger 4.5" diameter housings
• Inline Housing Spanners – For RO, GAC, and post-filter housings
• Heavy-Duty Spanners – With improved grip and torque strength
• Universal Fit Options – Compatible with most major brands
• Spare Spanners – For maintenance kits or replacements

✔ Makes filter cartridge replacement safe and easy
✔ Prevents overtightening or cracking of housings
✔ Designed for a secure, non-slip grip
✔ Lightweight, compact and easy to store
✔ Suitable for residential, commercial, and RO system use