The Watts WR100 Full Circle Filter Wrench is a professional-grade tool designed to remove and install standard 10-inch and 20-inch filter housings without the struggle. Built with directional indicators and a full-circle grip design, this wrench delivers the leverage needed to break tight seals on stubborn housings.
SPECIFICATIONS
Watts WR100 Full Circle Wrench Specs
Model Number
WR100
Watts OEM part
Compatible Housings
10" & 20"
Standard size
Length
10 inches
Ample leverage
Outer Diameter
5 inches
Full circle grip
Design Type
Full Circle
360° contact
Directional Guides
OPEN/CLOSE
Labeled with arrows
TECHNICAL DETAILS
Construction & Features
| Manufacturer | Watts |
| Part Number | WR100 (also sold as TGI Pure FH-WWF/3) |
| Tool Type | Full Circle Filter Housing Wrench |
| Dimensions | 10" length × 5" outer diameter |
| Grip Style | Full-circle contact design for even pressure distribution |
| Directional Markings | "OPEN" and "CLOSE" with directional arrows |
| Housing Compatibility | Standard 10-inch and 20-inch filter housings |
COMPATIBILITY & APPLICATIONS
What It Works With
The Watts WR100 filter wrench fits standard 10-inch and 20-inch whole house filter housings from Watts, Pentek, Culligan, GE, Whirlpool, and most major brands using the industry-standard sump diameter. The full-circle design distributes torque evenly around the housing, reducing the risk of cracking or cross-threading compared to strap or adjustable wrenches. Ideal for homeowners performing routine filter changes and technicians servicing residential and light commercial filtration systems. Works with both clear and opaque housings in sediment, carbon block, and specialty filter applications.
💧 Pro Tip: Before using the wrench, depressurize the housing completely using the red pressure release button. A small amount of food-grade silicone grease on the o-ring during reinstallation makes the next filter change significantly easier and helps prevent over-tightening.
