Description
Whether you’re replacing filter cartridges, servicing O-rings, or inspecting housings for wear, the WR40-50 gives you a secure grip without risking damage to the housing body. It’s a handy, low-cost tool every homeowner or technician should keep on hand.
Key Features
- Designed for Viqua housings: Specifically compatible with filter housings such as AWP40B-V, AWP40C-V, AWP42B-V, AWP50B-V, and AWP52B-V — all of which include the WR40-50 when purchased.
- Fits both 10″ and 20″ sumps: Works with a range of high-flow Big Blue-style housings that use 4½″ diameter cartridges.
- Lightweight and easy to use: Durable plastic construction makes it easy to grip and leverage even tight housings without cracking the sump.
- Prevents damage: Using the correct wrench avoids the typical cracking or wear that can occur if improvised tools are used.
Applications
The WR40-50 housing wrench is specifically intended for use with Viqua high-flow three-piece filter housings, including:
- AWP40B-V (10″)
- AWP40C-V (10″)
- AWP42B-V (20″)
- AWP50B-V (10″)
- AWP52B-V (20″)
- …and other housings that list WR40-50 as the included tool.
These housings are commonly used as whole-home pre-filters ahead of UV systems or softeners, typically housing sediment and carbon cartridges.
Why You Need It
Filter housings can sit snugly from water pressure, minerals, and aging O-rings — making them hard to open by hand. A proper housing wrench like the Viqua WR40-50 gives you controlled leverage, saving time and preventing injury or damage during filter changes and maintenance.
Maintenance Tips
- Always relieve pressure before using the wrench to make removal easier and safer.
- Apply food-grade silicone grease to the housing O-ring to help with resealing and future removal.
- Tighten the sump by hand and only snug with the wrench — over-tightening can make future servicing difficult.
Quick Tip: If your housing is stuck even with the proper wrench, depressurize thoroughly and consider using two wrenches opposite each other to reduce the strain on the housing and avoid damage.

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