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 30010260A 30000663A
    Navien 30006606A PCB BoardNAVIEN 30010260A CIRCULATION PUMP KITNavien APS (Air Pressure Sensor) 30000663A




    30015307A 30008909A 30017405A
    Navien Circulation Pump NCB/E 30015307ANavien Dual Venturi 30017402ANavien Navi-Link NPE Conversion Kit 30017405A




    100074351 30014451A 30017407A
    TAKAGI FLOW SENSOR 100074351 FOR T-K4Navien Circulation Pump Air Vent 30014451ANavien Navi-Link NHB Conversion Kit 30017407A




    PBCM-AS-001 30014699A 30010261A
    Navien PBCM-AS-001 Navi Link Wi-Fi Remote ControlNavien WPS (Water Pressure Sensor) 30014699A / 20007924ANAVIEN 30010261A CH CIRCULATION PUMP KIT




    30015811A 30004837B 30000456B
    Navien Air Pressure Sensor 30015811ANavien Bypass Mixing Valve 30004837BNavien Circulation Pump 30000456B




    30000466A 30010780B 30004827B
    Navien Circulation Pump 30000466ANavien Circulation Pump 30010780BNavien Cold Water Inlet Adapter (Plastic) / (Copper) 30004827B




    30004800B 30012033A 30000405A
    Navien DHW Flow Sensor 30013685A / 30004800BNavien DHW Flow Sensor 30012033BNavien Fan Motor 30000405A




    30008834A 30004684A 30004680A
    Navien Fan Motor 30008834ANavien Flame Rod Assembly (LP) 30004684ANavien Flame Rod Assembly (NG) 30004680A




    30008571A 30010537A 30011534A
    Navien Flow Sensor NPE/A 30008571ANAVIEN FLOW SENSOR 30010537ANavien Flow Sensor NPE/S 30011534A




    30008333D 30012269A 30011586A
    Navien NPE Front Panel 30008333DNavien Front Panel 30012269BNavien Gas Valve 30011586A




    30000666A 30002475A 30002521A
    Navien GPS (Gas Pressure Sensor) 30000666ANavien Ignition Transformer 30002475ANavien Inlet Water Filter 30002521A




    30007878A 30008171A 30002494A
    Navien Inlet Water Filter 30007878ANavien Inlet Water Filter 30008171ANavien Mixing Valve Transformer (Only Non-A) 30002494A




    30004825A 30012581A 30000619A
    Navien Motorized 2-Way Valve 30004825ANAVIEN 3/4" EASY VALVE KIT 30012581ANavien NR-10PU Remote Controller 30000619A




    30009757A 30009933A 30000670A
    Navien NR-20 DU Remote Controller 30009757ANavien O-Ring Kit 30009933ANavien Outdoor Sensor 30000670A




    30012950A 30000181A 30000182A
    Navien Outdoor Sensor w/ Wire 30012950ANavien PCB Board 30000181A KDC-323Navien PCB Board 30000182A KDC-324




    30011690D 30012262B 30008366A
    Navien PCB Board 30011690D KDC-330Navien PCB Board 30012262B KDC-350Navien Thermistor (Blue Wire) 30008366A




    30002491A 30004834B 30008245A
    Navien Transformer 30002491ANavien WAV (Water Adjustment Valve) 30004834BNavien WAV (Water Adjustment Valve) 30008245A




    Navien WAV (Water Adjustment Valve) 30011532A