TOTO ECOPOWER Touchless Toilet Flush Valve, 1.6 GPF, Concealed with 4" x 4" Cover Plate, IoT-Ready, Made to Order, with 1-1/2" Back Spud Vacuum Breaker Set, Stainless Steel - TET3GBIA31#SS

The TOTO TET3GBIA31#SS is an ECOPOWER touchless (sensor) flush valve for 1.6 GPF toilets with a 1-1/2" back spud inlet, concealed behind a 4" x 4" stainless steel cover plate. It ships complete with TOTO's 1" angle stop and 1-1/2" vacuum breaker set (VB1331R#RB). Its water-driven turbine recharges the power supply during use, so the valve is self-powered with no minimum daily usage requirement. It is IoT-ready; the IoT communication card is sold separately.

Common Questions

Is this the valve only, or does it include the vacuum breaker?

It is complete: the valve ships with TOTO's 1-1/2" vacuum breaker set (VB1331R#RB) for a back spud toilet.

Does it need electrical power?

No outside power: TOTO builds it as a self-powered hydroelectric system. Water flowing through the valve turns a turbine that recharges the power supply, and there is no minimum daily usage requirement.

Will it fit my toilet?

It is for a toilet with a 1-1/2" back spud inlet (TOTO's back spud sets are for wall-hung toilets). Pair it with a toilet bowl rated for 1.6 GPF.

Can it be installed in California and other high-efficiency states?

No. TOTO's 2026 Price Book states this 1.6 GPF model cannot be installed in CA, CO, GA, MA, NJ, NY, TX and WA due to high-efficiency requirements.

Specifications

• Supply Inlet: 1"
• Spud Size: 1-1/2"
• Application: Domestic Water
• Operation: Sensor
• MPN: TET3GBIA31#SS
• Certifications: ADA
• Fixture Served: Water Closet
• Gallons per Flush (GPF): 1.6
• Body Style: Concealed
• Cover Plate: 4x4 SS Cover Plate (Recess)
• Spud Position: Back Spud
• Vacuum Breaker: Atmospheric Vacuum Breaker
• Power Source: SSPS (Turbine)
• IoT Connectivity: Smart Capable with Adapter
• Finish: Stainless Steel
• Cannot Be Installed In: CA;CO;GA;MA;NJ;NY;TX;WA
• Not for Sale in California: Yes