Watts OneFlow Plus System (OFPSYS) - Salt-Free Scale Prevention and Water Filtration System
Watts OneFlow Plus System (OFPSYS)
Salt-free scale prevention with carbon filtration. Template-Assisted Crystallization technology protects plumbing while removing chlorine taste, odor, and sediment—no salt, no electricity, no wastewater.
Two technologies in one compact system
Template-Assisted Crystallization
TAC technology converts dissolved hardness minerals into microscopic crystals that stay suspended in water rather than forming scale on pipes and appliances. No salt exchange required.
Carbon Block Filtration
20-micron carbon block removes chlorine taste and odor while capturing sediment throughout your entire home. Cleaner water from every tap without the maintenance of traditional softeners.
Zero Waste Operation
No backwashing, no brine discharge, no electricity consumption. The Watts OneFlow Plus System (OFPSYS) operates passively, reducing environmental impact while saving on operating costs.
Flexible Installation
Designed for floor-standing or wall-mounted configuration. Compact footprint integrates with residential plumbing while maintaining full 10 GPM flow rate for household demand.
Watts OneFlow Plus System (OFPSYS) · Model 7100638
| Model Number | 7100638 |
| Maximum Flow Rate | 10 GPM |
| Maximum Temperature | 100°F |
| System Type | Residential Combo – Scale Prevention & Filtration |
| Installation | Floor-standing or wall-mounted |
| Cartridge Lifespan | Up to 3 years |
| Filtration Micron | 20 micron carbon block |
| Scale Prevention | Template-Assisted Crystallization (TAC) |
Replacement schedule for the Watts OneFlow Plus System
OneFlow Plus Combo Cartridge Pack
Replace both the TAC scale prevention cartridge and carbon block filter together. Combo pack ensures continued scale protection and chlorine reduction throughout the system's full capacity.
Carbon Block Cartridge Only
If chlorine taste or odor returns before the 3-year mark, replace just the carbon block filter. The TAC cartridge can continue operating independently until full service interval.
Minerals Remain
TAC prevents scale without removing beneficial minerals. Water retains calcium and magnesium for taste and health.
Lower Operating Cost
No salt purchases, no electricity consumption, no wastewater surcharges. Set and forget for years of passive operation.
Appliance Protection
Scale prevention extends the life of water heaters, dishwashers, and fixtures while maintaining flow efficiency throughout plumbing.
Whole Home Coverage
10 GPM flow rate supports simultaneous use across multiple fixtures without pressure drop or performance loss.
Watts OneFlow Plus System (OFPSYS)
Salt-free scale prevention with carbon filtration. Template-Assisted Crystallization technology protects plumbing while removing chlorine taste, odor, and sediment—no salt, no electricity, no wastewater.
Two technologies in one compact system
Template-Assisted Crystallization
TAC technology converts dissolved hardness minerals into microscopic crystals that stay suspended in water rather than forming scale on pipes and appliances. No salt exchange required.
Carbon Block Filtration
20-micron carbon block removes chlorine taste and odor while capturing sediment throughout your entire home. Cleaner water from every tap without the maintenance of traditional softeners.
Zero Waste Operation
No backwashing, no brine discharge, no electricity consumption. The Watts OneFlow Plus System (OFPSYS) operates passively, reducing environmental impact while saving on operating costs.
Flexible Installation
Designed for floor-standing or wall-mounted configuration. Compact footprint integrates with residential plumbing while maintaining full 10 GPM flow rate for household demand.
Watts OneFlow Plus System (OFPSYS) · Model 7100638
| Model Number | 7100638 |
| Maximum Flow Rate | 10 GPM |
| Maximum Temperature | 100°F |
| System Type | Residential Combo – Scale Prevention & Filtration |
| Installation | Floor-standing or wall-mounted |
| Cartridge Lifespan | Up to 3 years |
| Filtration Micron | 20 micron carbon block |
| Scale Prevention | Template-Assisted Crystallization (TAC) |
Replacement schedule for the Watts OneFlow Plus System
OneFlow Plus Combo Cartridge Pack
Replace both the TAC scale prevention cartridge and carbon block filter together. Combo pack ensures continued scale protection and chlorine reduction throughout the system's full capacity.
Carbon Block Cartridge Only
If chlorine taste or odor returns before the 3-year mark, replace just the carbon block filter. The TAC cartridge can continue operating independently until full service interval.
Minerals Remain
TAC prevents scale without removing beneficial minerals. Water retains calcium and magnesium for taste and health.
Lower Operating Cost
No salt purchases, no electricity consumption, no wastewater surcharges. Set and forget for years of passive operation.
Appliance Protection
Scale prevention extends the life of water heaters, dishwashers, and fixtures while maintaining flow efficiency throughout plumbing.
Whole Home Coverage
10 GPM flow rate supports simultaneous use across multiple fixtures without pressure drop or performance loss.
Original: $1,211.29
-65%$1,211.29
$423.95Description
Watts OneFlow Plus System (OFPSYS)
Salt-free scale prevention with carbon filtration. Template-Assisted Crystallization technology protects plumbing while removing chlorine taste, odor, and sediment—no salt, no electricity, no wastewater.
Two technologies in one compact system
Template-Assisted Crystallization
TAC technology converts dissolved hardness minerals into microscopic crystals that stay suspended in water rather than forming scale on pipes and appliances. No salt exchange required.
Carbon Block Filtration
20-micron carbon block removes chlorine taste and odor while capturing sediment throughout your entire home. Cleaner water from every tap without the maintenance of traditional softeners.
Zero Waste Operation
No backwashing, no brine discharge, no electricity consumption. The Watts OneFlow Plus System (OFPSYS) operates passively, reducing environmental impact while saving on operating costs.
Flexible Installation
Designed for floor-standing or wall-mounted configuration. Compact footprint integrates with residential plumbing while maintaining full 10 GPM flow rate for household demand.
Watts OneFlow Plus System (OFPSYS) · Model 7100638
| Model Number | 7100638 |
| Maximum Flow Rate | 10 GPM |
| Maximum Temperature | 100°F |
| System Type | Residential Combo – Scale Prevention & Filtration |
| Installation | Floor-standing or wall-mounted |
| Cartridge Lifespan | Up to 3 years |
| Filtration Micron | 20 micron carbon block |
| Scale Prevention | Template-Assisted Crystallization (TAC) |
Replacement schedule for the Watts OneFlow Plus System
OneFlow Plus Combo Cartridge Pack
Replace both the TAC scale prevention cartridge and carbon block filter together. Combo pack ensures continued scale protection and chlorine reduction throughout the system's full capacity.
Carbon Block Cartridge Only
If chlorine taste or odor returns before the 3-year mark, replace just the carbon block filter. The TAC cartridge can continue operating independently until full service interval.
Minerals Remain
TAC prevents scale without removing beneficial minerals. Water retains calcium and magnesium for taste and health.
Lower Operating Cost
No salt purchases, no electricity consumption, no wastewater surcharges. Set and forget for years of passive operation.
Appliance Protection
Scale prevention extends the life of water heaters, dishwashers, and fixtures while maintaining flow efficiency throughout plumbing.
Whole Home Coverage
10 GPM flow rate supports simultaneous use across multiple fixtures without pressure drop or performance loss.
