Watts OFTWH Tankless One Flow Anti-Scale System
Watts OFTWH Technical Details
| Model Number | Watts OFTWH (OneFlow Anti-Scale Tankless) |
| Maximum Flow Rate | 10 GPM |
| Connection Size | 3/4" Female NPT |
| Maximum Temperature | 100°F |
| Cartridge Lifespan | 2 years minimum |
| System Type | Single cartridge, template-assisted crystallization |
| Application | Cold water line protection for tankless water heaters |
| Bypass Valve | Required (sold separately) |
Setup & Maintenance
- Install the Watts OFTWH on the cold water line directly before your tankless water heater. Do not install on the hot water side or after the heater.
- Plumb the system with a bypass valve to allow isolation of the filter housing during cartridge replacement or maintenance.
- Ensure water temperature entering the system does not exceed 100°F. The OneFlow media requires cold water to function properly.
- Replace the OneFlow cartridge every two years minimum to maintain effective scale protection, regardless of water volume processed.
System Requirements
The Watts OFTWH is designed specifically for single tankless water heater installations in residential applications. It requires a 3/4" NPT plumbing connection and must be installed on cold water supply lines only. This system works with all tankless heater brands and does not require electricity, drain lines, or regeneration cycles. The OneFlow technology is compatible with all water chemistry types but performs best when water temperature remains below 100°F at the inlet.
Watts OFTWH Technical Details
| Model Number | Watts OFTWH (OneFlow Anti-Scale Tankless) |
| Maximum Flow Rate | 10 GPM |
| Connection Size | 3/4" Female NPT |
| Maximum Temperature | 100°F |
| Cartridge Lifespan | 2 years minimum |
| System Type | Single cartridge, template-assisted crystallization |
| Application | Cold water line protection for tankless water heaters |
| Bypass Valve | Required (sold separately) |
Setup & Maintenance
- Install the Watts OFTWH on the cold water line directly before your tankless water heater. Do not install on the hot water side or after the heater.
- Plumb the system with a bypass valve to allow isolation of the filter housing during cartridge replacement or maintenance.
- Ensure water temperature entering the system does not exceed 100°F. The OneFlow media requires cold water to function properly.
- Replace the OneFlow cartridge every two years minimum to maintain effective scale protection, regardless of water volume processed.
System Requirements
The Watts OFTWH is designed specifically for single tankless water heater installations in residential applications. It requires a 3/4" NPT plumbing connection and must be installed on cold water supply lines only. This system works with all tankless heater brands and does not require electricity, drain lines, or regeneration cycles. The OneFlow technology is compatible with all water chemistry types but performs best when water temperature remains below 100°F at the inlet.
Description
Watts OFTWH Technical Details
| Model Number | Watts OFTWH (OneFlow Anti-Scale Tankless) |
| Maximum Flow Rate | 10 GPM |
| Connection Size | 3/4" Female NPT |
| Maximum Temperature | 100°F |
| Cartridge Lifespan | 2 years minimum |
| System Type | Single cartridge, template-assisted crystallization |
| Application | Cold water line protection for tankless water heaters |
| Bypass Valve | Required (sold separately) |
Setup & Maintenance
- Install the Watts OFTWH on the cold water line directly before your tankless water heater. Do not install on the hot water side or after the heater.
- Plumb the system with a bypass valve to allow isolation of the filter housing during cartridge replacement or maintenance.
- Ensure water temperature entering the system does not exceed 100°F. The OneFlow media requires cold water to function properly.
- Replace the OneFlow cartridge every two years minimum to maintain effective scale protection, regardless of water volume processed.
System Requirements
The Watts OFTWH is designed specifically for single tankless water heater installations in residential applications. It requires a 3/4" NPT plumbing connection and must be installed on cold water supply lines only. This system works with all tankless heater brands and does not require electricity, drain lines, or regeneration cycles. The OneFlow technology is compatible with all water chemistry types but performs best when water temperature remains below 100°F at the inlet.
