The Performa 278 with 742 LOGIX Timer is a complete regenerating control valve assembly for the larger-bore Performa 278 valve body, used on higher-flow twin-alternating commercial and industrial softener installations. The 742 head is an electromechanical 12-day time clock, driving the valve through its regeneration cycle on a fixed schedule, which suits sites with steady, predictable water use. Supplied as a full valve and control head assembly, this unit is stocked by WrekinWater as a direct replacement for an existing Performa 278-742 valve.
Technical specifications
OEM Part Number
10345000010 C00002 / 0304081461
Valve Series
Autotrol Performa 278
Control Head
742 LOGIX Timer (12-day electromechanical time clock)
Regeneration Type
Time-initiated, fixed schedule
Application
Higher-flow twin-alternating commercial and industrial water softener systems
Brand
Pentair Autotrol
Symptoms that mean you need this part
The 742 timer motor or gear train has failed and the valve no longer indexes through its regeneration cycle
The piston and seal stack are worn beyond what a rebuild kit can restore, with continuous leakage to drain or across the bypass
The larger 278 valve body is cracked, split or damaged, which is common where flow rates and pressures are higher than a standard 268
The existing valve is obsolete or beyond economic repair and needs replacing as a complete unit
Regeneration is happening at the wrong time or not at all despite the timer being correctly set
Why it fails / why it matters
The Performa 278 body is built for higher continuous flow than the 268, so it's typically found on larger commercial installations where the volume of soft water needed justifies the bigger valve. The 742 timer still drives regeneration on a fixed 12-day schedule regardless of tank size, but the larger piston and seal stack in the 278 body are working under higher flow and pressure, so wear can show up as leakage to drain, a valve stuck part-way through its cycle, or a complete failure to regenerate. When the fault lies in the valve body, piston or timer mechanism itself, replacing the complete 278-742 assembly is the practical fix.
Why buy this from WrekinWater
WrekinWater has supplied water softener parts to installers, commercial engineers and DIY customers for over 15 years from its base in Bettisfield, Shropshire, and stocks the full range of Pentair Autotrol, Fleck, Clack and Kinetico valves and control heads. With more than 50,000 customers served and an Excellent rating on Trustpilot, WrekinWater is a dependable source for larger-format control valves like the 278 when a commercial system needs to get back up and running.
How to fit it
Before ordering, confirm the replacement valve's tank thread, riser tube diameter and distributor design match your existing 278 installation
Isolate the softener system at the bypass valve and relieve pressure from both mineral tanks before starting work
Have a competent installer or commercial water treatment engineer disconnect the existing valve from the tank head, drain line, brine line and any interconnect wiring
Transfer the riser tube and distributor basket into the new 278-742 valve assembly, fitting new o-rings as needed
Fit the new valve to the tank, reconnect inlet, outlet, drain, brine and interconnect wiring, then set the 12-day timer to the correct regeneration schedule
Return the system to service and confirm correct alternation and regeneration timing over a full cycle before leaving it unattended
The Performa 278 with 742 LOGIX Timer is a complete regenerating control valve assembly for the larger-bore Performa 278 valve body, used on higher-flow twin-alternating commercial and industrial softener installations. The 742 head is an electromechanical 12-day time clock, driving the valve through its regeneration cycle on a fixed schedule, which suits sites with steady, predictable water use. Supplied as a full valve and control head assembly, this unit is stocked by WrekinWater as a direct replacement for an existing Performa 278-742 valve.
Technical specifications
OEM Part Number
10345000010 C00002 / 0304081461
Valve Series
Autotrol Performa 278
Control Head
742 LOGIX Timer (12-day electromechanical time clock)
Regeneration Type
Time-initiated, fixed schedule
Application
Higher-flow twin-alternating commercial and industrial water softener systems
Brand
Pentair Autotrol
Symptoms that mean you need this part
The 742 timer motor or gear train has failed and the valve no longer indexes through its regeneration cycle
The piston and seal stack are worn beyond what a rebuild kit can restore, with continuous leakage to drain or across the bypass
The larger 278 valve body is cracked, split or damaged, which is common where flow rates and pressures are higher than a standard 268
The existing valve is obsolete or beyond economic repair and needs replacing as a complete unit
Regeneration is happening at the wrong time or not at all despite the timer being correctly set
Why it fails / why it matters
The Performa 278 body is built for higher continuous flow than the 268, so it's typically found on larger commercial installations where the volume of soft water needed justifies the bigger valve. The 742 timer still drives regeneration on a fixed 12-day schedule regardless of tank size, but the larger piston and seal stack in the 278 body are working under higher flow and pressure, so wear can show up as leakage to drain, a valve stuck part-way through its cycle, or a complete failure to regenerate. When the fault lies in the valve body, piston or timer mechanism itself, replacing the complete 278-742 assembly is the practical fix.
Why buy this from WrekinWater
WrekinWater has supplied water softener parts to installers, commercial engineers and DIY customers for over 15 years from its base in Bettisfield, Shropshire, and stocks the full range of Pentair Autotrol, Fleck, Clack and Kinetico valves and control heads. With more than 50,000 customers served and an Excellent rating on Trustpilot, WrekinWater is a dependable source for larger-format control valves like the 278 when a commercial system needs to get back up and running.
How to fit it
Before ordering, confirm the replacement valve's tank thread, riser tube diameter and distributor design match your existing 278 installation
Isolate the softener system at the bypass valve and relieve pressure from both mineral tanks before starting work
Have a competent installer or commercial water treatment engineer disconnect the existing valve from the tank head, drain line, brine line and any interconnect wiring
Transfer the riser tube and distributor basket into the new 278-742 valve assembly, fitting new o-rings as needed
Fit the new valve to the tank, reconnect inlet, outlet, drain, brine and interconnect wiring, then set the 12-day timer to the correct regeneration schedule
Return the system to service and confirm correct alternation and regeneration timing over a full cycle before leaving it unattended
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