Navien Parts and Replacement Items
Navien tankless water heaters have been around for over a decade now, there are bound to be some Navien parts that fail and need to be replaced. Common part inquires we get here are for O rings, control boards, flow sensor, and mixing valve transformers.

We do carry parts but we are located in Toronto, Canada. Thus we have found that Amazon is a great vessel to help people purchase replacement parts throughout North America and abroad. Check out the links and items listed to see if we have what you are after. If not feel free to send us a quick message and we might be able to help.
There are a lot of parts listed here, try our search bar or alternatively hit ctrl and f on your keyboard and your computer will search this page for any keyword you type in.
All the Navien Error codes and descriptions can be found here
Common Navien Replacement Parts
Circulation Pump
Description – Navien 30010780B Circulation Pump
Part# 30010780B
Purchase Link – Navien 30010780B Circulation Pump
Additional Info – Old Part Numbers: 30010780A, 30008355A, 30008355B for All Npe Models
Motorized 3-Way Valve
Description – Navien 30004831C Motorized 3-Way Valve
Part# 30004831C
Purchase Link – Navien 30004831C Motorized 3-Way Valve
Additional Info – Navien 30004831B / 30004816A Motorized 3-Way Valve For Ch / Ncb Series (Old # Aavc9Ex00018A /Aavc9Ex00009A) Ch Series Parts ncb Series Parts
Cold Water Filter
Description – Navien 30007878A Dhw Cold Water Filter
Part# 30007878A
Purchase Link – Navien 30007878A Dhw Cold Water Filter
Additional Info – WATER INLET FILTER
Navien Fan
Description – Navien Fan FB-1K050 NPE
Part# 30008834A
Purchase Link – Navien Fan FB-1K050 NPE
Additional Info – FAN FOR NPE UNITS
Ignition Transformer
Description – Navien Ignition Transformer
Part# 30010455A
Purchase Link – Navien 30010455A Ignition Transformer
Additional Info – Ignition Transformer For Npe Series
Water Adjustment Valve
Description – Navien WATER ADJUSTMENT VALVE, for NPE-A models
Part# 30008245A
Purchase Link – Navien WATER ADJUSTMENT VALVE, for NPE-A model
Additional Info – Replacement Valve NPE Series
Flame Rod NPE NCB Series
Description – Navien Flame Rod Assembly NPE NCB Series
Part# 30012226A
Purchase Link – Navien Flame Rod Assembly
Additional Info – Navien Flame Rod Assembly fpr NPE and NCB
Flame Rod (Nat Gas)
Description – Navien Flame Rod Assembly for CC CH CR models
Part# 30004680A
Purchase Link – Navien Flame Rod Assembly
Additional Info – Fits a variety of Navien models – replacement for these Old Part Numbers: PH1603058A, PH1603058D, PH1603058E, 20016776A, 30004677D
O-Ring Kit
Description – Navien 30009933A O-Ring Kit
Part# 30009933A
Purchase Link – Navien O-Ring Kit
Additional Info – Navien 30009933A O-Ring Kit Navien 30009933A O-Ring Kit NAV30009933A
Navien Gas Valve
Description – Navien Gas Valve for all models
Part# 30002208A
Purchase Link – Navien Gas Valve
Additional Info – Old part number BH0901018A
Silicon O-Ring Kit
Description – O-Ring kit for NP-240, NP-240E
Part# 20018013A
Purchase Link – Navien O-Ring Kit
Additional Info – Navien 20018013A Silicon O-Ring For NP-240, NP-240E Water Heater, 31.5mm Dia. x 3.5mm
Navien O-Ring (P16)
Description – P16 Navien O-Ring
Part# 20017210A
Purchase Link – 20017210A P16 Navien O-Ring
Additional Info – Old Part Number BH2422017A or BH22422030A
Navien Flow Sensor
Description – Brand new Navien flow sensor
Part# 30010537A
Purchase Link – 30010537A Navien flow sensor
Additional Info – Fits most Navien tankless models.
Flame Rod (Propane)
Description – Navien 30004684A Flame Rod Assembly (Propane)
Part# 30004684A
Purchase Link – Navien Propane Flame Rod Assembly
Additional Info – Navien 30004684A Flame Rod Assembly (Propane) Old part# Ph1603059D/E for: CH/CC/CR Series (Propane Only).
Air Pressure Flow Sensor
Description – Navien 30000663A Air Pressure Flow Sensor (Aps)
Part# 30000663A
Purchase Link – Navien Air Pressure Flow Sensor (Aps)
Additional Info – old part number NASS9EX00009 for: CH/CC/CR/NR/NP Series
Water Pipe Adapter (A)
Description – Navien 30008568A Water Pipe Adapter (A)
Part# 30008568A
Purchase Link – Navien Water Pipe Adapter
Additional Info – Navien 30008568A Water Pipe Adapter
Water Adjustment Valve
Description – Navien 30004834B Water Adjustment Valve
Part# 30004834B
Purchase Link – Navien 30004834B Water Adjustment Valve
Additional Info – Navien 30004834B Water Adjustment Valve For NR/NP/CC/CR Series — replaces part # Aavc9Exfc003B
Space Heating Strainer
Description – Navien 30002513D Space Heating Strainer
Part# 30002513D
Purchase Link – Navien 30002513D Space Heating Strainer
Additional Info – Navien 30002513D Space Heating Strainer For Ch Series — old part# Bh1301020Bch
Bypass Mixing Valve
Description – Navien 30004837B Bypass Mixing Valve
Part# 30004837B
Purchase Link – Navien 30004837B Bypass Mixing Valve
Additional Info – Navien 30004837B Bypass Mixing Valve For NR/NP replaces part Aavc9Exmix01B
2-Way Valve
Description – Navien 30004825A 2-Way Valve
Part# 30004825A
Purchase Link – Navien 30004825A 2-Way Valve
Additional Info – Navien 30004825A 2-Way Valve Replaces Aavc9Ex00014A Navien NP Condensing Tankless Gas Water Heater
Dhw Flow Sensor
Description – Navien 30012033B Dhw Flow Sensor
Part# 30012033B
Purchase Link – Navien 30012033B Dhw Flow Sensor
Additional Info – Navien 30012033B Dhw Flow Sensor Replaces 30012033A Ncb-180 Ncb210 Ncb-240.
Navien Circulation Pump
Description – Navien 30012768A Circulation Pump
Part# 30012768A
Purchase Link – Navien 30012768A Circulation Pump
Additional Info – Navien 30012768A Circulation Pump For NCB Series 120V (Replaces pct1W0725B) For NCB Models
Mixing Valve Transformer
Description – Navien 30002494A Mixing Valve Transformer
Part# 30002494A
Purchase Link – Navien 30002494A Mixing Valve Transformer
Additional Info – Navien 30002494A Mixing Valve Transformer (Old # Bh1205013A)
Water Pressure Sensor (Lwco)
Description – Navien 30014699A Water Pressure Sensor (low water cut off) LWCO
Part# 30014699A
Purchase Link – Navien 30014699A Water Pressure Sensor (Lwco)
Additional Info – Navien 30014699A Water Pressure Sensor (lwco) For CH/NCB Series (Old # Bh2507535A / 20007924A )
NCB Front Panel Upgrade
Description – Navien 30012269B Ncb Front Panel Kit for Navilink Wi-Fi Upgrade
Part# 30012269B
Purchase Link – Navien NCB Front Panel Kit Wi-Fi Upgrade
Additional Info – Navien 30012269B NCB Front Panel Kit For Navilink Wi-Fi Upgrade -Kdc-350Pfor NCB Models Manufactured Before 03.22.16.
Control Board NPE-A
Description – Navien 30008300A Pcb (Kdc-330-5M)
Part# 30008300A
Purchase Link – Navien 30008300A Pcb (Kdc-330-5M)
Additional Info – Navien 30008300A Pcb (Kdc-330-5M) For NPE (A) Series
Control Board CH Series
Description – Navien 30000181A PC Board (Kdc-323)
Part# 30000181A
Purchase Link – Navien 30000181A PC Board (Kdc-323)
Additional Info – Navien 30000181A PC Board (Kdc-323)For CH Series.
Circulation Pump
Description – Navien 30000456B Circulation Pump
Part# 30000456B
Purchase Link – Navien 30000456B Circulation Pump
Additional Info – Navien 30000456B Circulation Pump CH series
Navien Check Valve
Description – Navien 30008359A Check Valve
Part# 30008359A
Purchase Link – Navien 30008359A Check Valve
Additional Info – Navien 30008359A Check Valve For NPE Series — old part # 30008360Anpe
Buffer Tank T-Adapter
Description – Navien 30002193C Buffer Tank T-Adapter (Blue Thermostat)
Part# 30002193C
Purchase Link – Navien Buffer Tank T-Adapter (Blue Thermostat)
Additional Info – Navien 30002193C Buffer Tank T-Adapter (Blue Thermostat) Pa66 For: Cc / Cr Series Replaces Bh0712002C
Hot Water Outlet Pipe
Description – Navien 30008338A Hot Water Outlet Pipe
Part#
Purchase Link – Navien 30008338A Hot Water Outlet Pipe
Additional Info – Navien 30008338A Hot Water Outlet Pipe Assembly for Np/Np240/Np-240E Models
Thermistor (Red Wire)
Description – 30007955A Navien Thermistor (Red Wire)
Part# 30007955A
Purchase Link – Navien Thermistor (Red Wire)
Additional Info – Old Part Number BH1403083A
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