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Takagi Part Subpage

Takagi Gas Valve — Modulating Solenoid

Takagi modulating gas valve solenoid. Dealer-only replacement.

Updated May 2026 · Takagi Water Heaters

The Takagi gas valve controls gas flow to the burner. Modulating solenoid that lets the unit fire from 15% to 100% of max BTU.

Why dealer-only

  • Gas-line work — licensed plumber territory
  • Factory-calibrated for NG or LP
  • Improper install creates leak hazard
  • Warranty voided if non-licensed person does gas work

Symptoms

  • Burner won't light — solenoid stuck closed
  • Burner stuck at full fire
  • Burner stuck at low fire
  • Burner won't shut off

Cost

  • Parts: $250-500 OEM
  • Labor: $300-600
  • Total: $550-1,100

NG to LP conversion

Requires Takagi LP conversion kit + licensed installer to recalibrate.

Bottom line

Suspect gas valve = call Takagi support. Don't operate if stuck-open suspected.