Fluidmaster Torbeck Fill Valve — B661AT3/8B
Discontinued Feb 2026 3/8" Brass Shank
Notice: This product was discontinued by the manufacturer in February 2026. Click here for the official recommended replacement: Fluidmaster 400EL.
Technical Summary:
MPN: B661AT3/8B | Thread: 3/8" BSP Brass | Pressure: 0.2 - 8.0 Bar | Entry: Bottom
Legacy Features
- Compact Footprint: Specifically designed for tight, small cistern spaces.
- Quiet Operation: Engineered to reduce noise and prevent water hammer.
- Anti-Siphon: Integrated backflow prevention to protect the water supply.
- Adjustable Height: Versatile body height for various cistern depths.
Replacement Advice
While the B661AT3/8B is no longer in production, the Fluidmaster 400EL offers an upgraded performance profile with the same 3/8" brass connection.
Maintenance: If you currently have this valve installed, the internal filter is removable for cleaning to extend the unit's lifespan before a full replacement is required.