Your source for genuine replacement parts for Navien Tankless water heaters.

Tankless water heaters, also called instantaneous water heaters instantly heat water on demand.  Since there is no standing vessel of hot water that requires periodic firing, tankless water heaters are generally amongst the more efficient options for both residential and commercial use.

A world leader in this category is Navien.  KyungDong Navien (KD Navien) was founded in 1978 and in 1988 KD Navien became the first company in Asia to develop and produce a highly efficient, environmentally-friendly condensing boiler.  This quickly established the company as the leader in the condensing boiler market.  Navien manufactures the world's top efficient, energy saving and CO2 reducing water heating products.

In 2006, Navien, Inc., formerly Navien America, Inc. was established to open new markets in the United States and Canada for parent company KD Navien.  With countless Navien water heaters in the field there is the evergrowing need to maintain the life expectancy of these units.  While the life expectancy of a Navien tankless water heater is commonly 20 years or more, there can be component failure.  The flow sensors, printed circuit boards, neutralizers, blower motors, o-rings, pumps, fan assembly, flame rods, mixing valves and more may require replacing well before the heat exchangers become worn past a useful life. is an online store from an experienced and authorized wholesaler for Navien.  We stock an extensive inventory and our staff is trained to assist in the technical basics.  We can usually ship products the very same day.  Please be aware that products not purchased from an authorized distributor or from certain online channels may not qualify for technical support.  In addition, encourages all customers to register their products with Navien, Inc. so that owners will be entitled to complete warranty support. Register here.


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    30006606A 30000663A 30015307A
    Navien 30006606A PCB BoardNavien APS (Air Pressure Sensor) 30000663ANavien Circulation Pump NCB/E 30015307A




    30008909A 30017405A 100074351
    Navien Dual Venturi 30017402ANavien Navi-Link NPE Conversion Kit 30017405ATAKAGI FLOW SENSOR 100074351 FOR T-K4




    WEIL MCLAIN .95 PRESSURE SWITCH 511-624-404 30014451A 30017407A
    WEIL MCLAIN .95 PRESSURE SWITCH 511-624-404Navien Circulation Pump Air Vent 30014451ANavien Navi-Link NHB Conversion Kit 30017407A




    PBCM-AS-001 30014699A 30015811A
    Navien PBCM-AS-001 Navi Link Wi-Fi Remote ControlNavien WPS (Water Pressure Sensor) 30014699A / 20007924ANavien Air Pressure Sensor 30015811A




    30004837B 30000456B 30000466A
    Navien Bypass Mixing Valve 30004837BNavien Circulation Pump 30000456BNavien Circulation Pump 30000466A




    30010780B 30004827B 30004800B
    Navien Circulation Pump 30010780BNavien Cold Water Inlet Adapter (Plastic) / (Copper) 30004827BNavien DHW Flow Sensor 30013685A / 30004800B




    30012033A 30000405A 30008834A
    Navien DHW Flow Sensor 30012033BNavien Fan Motor 30000405ANavien Fan Motor 30008834A




    30004684A 30004680A 30008571A
    Navien Flame Rod Assembly (LP) 30004684ANavien Flame Rod Assembly (NG) 30004680ANavien Flow Sensor NPE/A 30008571A




    30010537A 30011534A 30008333D
    NAVIEN FLOW SENSOR 30010537ANavien Flow Sensor NPE/S 30011534ANavien NPE Front Panel 30008333D




    30012269A 30011586A 30000666A
    Navien Front Panel 30012269BNavien Gas Valve 30011586A Navien GPS (Gas Pressure Sensor) 30000666A




    30002475A 30002521A 30007878A
    Navien Ignition Transformer 30002475ANavien Inlet Water Filter 30002521ANavien Inlet Water Filter 30007878A




    30008171A 30002494A 30004825A
    Navien Inlet Water Filter 30008171ANavien Mixing Valve Transformer (Only Non-A) 30002494ANavien Motorized 2-Way Valve 30004825A




    30012581A 30000619A 30009757A
    NAVIEN 3/4" EASY VALVE KIT 30012581ANavien NR-10PU Remote Controller 30000619ANavien NR-20 DU Remote Controller 30009757A




    30009933A 30000670A 30012950A
    Navien O-Ring Kit 30009933ANavien Outdoor Sensor 30000670ANavien Outdoor Sensor w/ Wire 30012950A




    30000181A 30000182A 30011690D
    Navien PCB Board 30000181A KDC-323Navien PCB Board 30000182A KDC-324Navien PCB Board 30011690D KDC-330




    30012262B 30008366A 30002491A
    Navien PCB Board 30012262B KDC-350Navien Thermistor (Blue Wire) 30008366ANavien Transformer 30002491A




    30004834B 30008245A 30011532A
    Navien WAV (Water Adjustment Valve) 30004834BNavien WAV (Water Adjustment Valve) 30008245ANavien WAV (Water Adjustment Valve) 30011532A