Navien

With a 40 year track record of innovation in engineering leadership, Navien delivers premium condensing-technology heating and hot-water systems. Navien products cover everything from tankless water heaters and combi-boilers to heat-pump solutions and commercial-grade condensing boilers.

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Navien 20018013A Silicone O-Ring 31.7 x 3.5 for Boilers and Water Heaters

Navien

SKU: 20018013A
$0.80
MSRP: $0.92
You save 13%
Navien 20018013A Silicone O-Ring 31.7 x 3.5 for Boilers and Water Heaters quantity
Navien 20006949A O-Ring EPDM 17.5 x 2.7 NSF E751

Navien

SKU: 20006949A
$0.75
MSRP: $0.86
You save 15%
Navien 20006949A O-Ring EPDM 17.5 x 2.7 NSF E751 quantity
Navien 30008360A Check Valve (POM) – OEM Replacement for NPE Series Tankless Water Heaters

Navien

SKU: 30008360A
$6.44
MSRP: $7.41
You save 15%
Navien 30008360A Check Valve (POM) – OEM Replacement for NPE Series Tankless Water Heaters quantity
Navien 30028670A Sight Glass Assembly for Boilers and Water Heaters

Navien

SKU: 30028670A
$14.80
MSRP: $17.02
You save 15%
Navien 30028670A Sight Glass Assembly for Boilers and Water Heaters quantity
Water Inlet Filter Replacement for NPE Series Tankless Water Heaters

Navien

SKU: 30008171A
$4.85
MSRP: $5.58
You save 13%
Navien 30008171A Water Inlet Filter – OEM Replacement for NPE Series Tankless Water Heaters quantity
Navien 30011532B T405-196R Adjustable Water Valve for Boilers and Water Heaters

Navien

SKU: 30011532B
$51.21
MSRP: $58.89
You save 13%
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Navien 20047738A Packing for Boilers and Water Heaters

Navien

SKU: 20047738A
$2.45
MSRP: $2.82
You save 15%
Navien 20047738A Packing for Boilers and Water Heaters quantity
Navien 30030359A Motorized 3-Way Valve – OEM Replacement for NCB-H Series Boilers & Water Heaters

Navien

SKU: 30030359A
$50.48
MSRP: $58.05
You save 13%
Navien 30030359A Motorized 3-Way Valve – OEM Replacement for NCB-H Series Boilers & Water Heaters quantity
Navien 30008366A Thermistor (Blue) – OEM Replacement for NPE Series Tankless Water Heaters

Navien

SKU: 30008366A
$3.55
MSRP: $4.08
You save 15%
Navien 30008366A Thermistor (Blue) – OEM Replacement for NPE Series Tankless Water Heaters quantity
Navien 30010780C Circulation Pump – OEM Replacement for NPE Series Tankless Water Heaters

Navien

SKU: 30010780C
$152.31
MSRP: $175.16
You save 15%
Navien 30010780C Circulation Pump – OEM Replacement for NPE Series Tankless Water Heaters quantity
Navien 30025036A Thermal Fuse for NPE-2 & NCB-H Tankless Water Heaters – OEM Replacement

Navien

SKU: 30025036A
$4.66
MSRP: $5.36
You save 15%
Navien 30025036A Thermal Fuse for NPE-2 & NCB-H Tankless Water Heaters – OEM Replacement quantity
Navien 20006954A O-Ring for Boilers and Water Heaters

Navien

SKU: 20006954A
$8.99
MSRP: $10.34
You save 15%
Navien 20006954A O-Ring for Boilers and Water Heaters (1 Pack Of 5) quantity
Navien 20017210A O-Ring for Boilers and Water Heaters

Navien

SKU: 20017210A
$1.21
MSRP: $1.39
You save 15%
Navien 20017210A O-Ring for Boilers and Water Heaters quantity
Navien 30010677A Water Inlet Filter for Boilers and Water Heater

Navien

SKU: 30010677A
$2.76
MSRP: $3.17
You save 15%
Navien 30010677A Water Inlet Filter for Boilers and Water Heater quantity
Navien 30026265A Flame Rod Assembly for NPE & NCB Models

Navien

SKU: 30026265A
$18.21
MSRP: $20.94
You save 13%
Navien 30026265A Flame Rod Assembly for NPE & NCB Models quantity
Navien 30017402A Dual Venturi Meter for NCB/NCB-E & NPE Tankless Water Heaters – OEM Replacement

Navien

SKU: 30017402A
$69.35
MSRP: $79.75
You save 13%
Navien 30017402A Dual Venturi Meter for NCB/NCB-E & NPE Tankless Water Heaters – OEM Replacement quantity
Navien 20032528A O-Ring NHB for All Models Boilers and Water Heaters

Navien

SKU: 20032528A
$0.80
MSRP: $0.92
You save 13%
Navien 20032528A O-Ring NHB for All Models Boilers and Water Heaters quantity
Navien 20017212A O-Ring for Boilers and Water Heaters

Navien

SKU: 20017212A
$1.65
MSRP: $1.90
You save 13%
Navien 20017212A O-Ring for Boilers and Water Heaters quantity
Navien 30009478A Exhaust Thermistor for NPE Models – OEM Replacement Part

Navien

SKU: 30009478A
$6.22
MSRP: $7.15
You save 15%
Navien 30009478A Exhaust Thermistor for NPE Models – OEM Replacement Part quantity
Navien 30008571A Flow Sensor (T701-128R) – OEM Replacement for NPE-A Series Tankless Water Heaters

Navien

SKU: 30008571A
$41.93
MSRP: $48.22
You save 15%
Navien 30008571A Flow Sensor (T701-128R) – OEM Replacement for NPE-A Series Tankless Water Heaters quantity
Navien 30004831C Motorized 3-Way Valve – OEM Replacement for Navien Boilers & Water Heaters

Navien

SKU: 30004831C
$53.00
MSRP: $60.95
You save 13%
Navien 30004831C Motorized 3-Way Valve – OEM Replacement for Navien Boilers & Water Heaters quantity
Navien 20022744A Fan Motor Packing for Boilers and Water Heaters

Navien

SKU: 20022744A
$2.60
MSRP: $2.99
You save 13%
Navien 20022744A Fan Motor Packing for Boilers and Water Heaters quantity
Navien 20006666A Fuse 250V 5A for NPE, NCB, and NFB Series

Navien

SKU: 20006666A
$0.88
MSRP: $1.01
You save 15%
Navien 20006666A Fuse 250V 5A for NPE, NCB, and NFB Series quantity
Navien 20035277A Packing Pump for NCB-E Series Tankless Water Heaters – OEM Replacement

Navien

SKU: 20035277A
$0.75
MSRP: $0.86
You save 13%
Navien 20035277A Packing Pump for NCB-E Series Tankless Water Heaters – OEM Replacement quantity
Navien 20030919A O-Ring EPDM 17×4 70 Bk – Genuine OEM Replacement for NCB-E Series

Navien

SKU: 20030919A
$1.01
MSRP: $1.16
You save 15%
Navien 20030919A O-Ring EPDM 17x4 70 Bk – Genuine OEM Replacement for NCB-E Series quantity
Navien 30014451A Air Vent for NCB, NCB-E & NPE Tankless Water Heaters – OEM Replacement

Navien

SKU: 30014451A
$11.84
MSRP: $13.62
You save 15%
Navien 30014451A Air Vent for NCB, NCB-E & NPE Tankless Water Heaters – OEM Replacement quantity
Navien 30010455A Ignition Transformer for NCB & NCB-E Combi-Boilers – OEM Replacement

Navien

SKU: 30010455A
$20.18
MSRP: $23.21
You save 13%
Navien 30010455A Ignition Transformer for NCB & NCB-E Combi-Boilers – OEM Replacement quantity
Navien 20011438A O-Ring EPDM P14 for Boilers and Water Heaters

Navien

SKU: 20011438A
$0.75
MSRP: $0.86
You save 15%
Navien 20011438A O-Ring EPDM P14 for Boilers and Water Heaters quantity
Navien 30024866A Flow Sensor for NPE & NCB-E Tankless Water Heaters – OEM Replacement

Navien

SKU: 30024866A
$42.99
MSRP: $49.44
You save 15%
Navien 30024866A Flow Sensor for NPE & NCB-E Tankless Water Heaters – OEM Replacement quantity
Navien 30011534B Flow Sensor for NPE/S Tankless Water Heaters – OEM Replacement

Navien

SKU: 30011534B
$46.29
MSRP: $53.23
You save 13%
Navien 30011534B Flow Sensor for NPE/S Tankless Water Heaters – OEM Replacement quantity
Navien 30013686A Siphon & Hose for NPE Tankless Water Heaters – OEM Replacement

Navien

SKU: 30013686A
$14.65
MSRP: $16.85
You save 15%
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Navien 30022717B Remote Controller for NPN & NPE2 Models – OEM Replacement

Navien

SKU: 30022717B
$112.00
MSRP: $128.80
You save 13%
Navien 30022717B Remote Controller for NPN & NPE2 Models – OEM Replacement quantity
Navien 30004680A Flame Rod Ignition Assembly – Natural Gas Boiler & Water Heater Replacement Part

Navien

SKU: 30004680A
$9.78
MSRP: $11.25
You save 13%
Navien 30004680A Flame Rod Ignition Assembly – Natural Gas Boiler & Water Heater Replacement Part quantity
Navien 20007610A Wall Mounting Bracket Kit for Boilers and Water Heaters

Navien

SKU: 20007610A
$3.83
MSRP: $4.40
You save 15%
Read more
Navien 20018079A Silicone O-Ring G75 74.4 x 3.1 for Boilers and Water Heaters

Navien

SKU: 20018079A
$2.60
MSRP: $2.99
You save 13%
Navien 20018079A Silicone O-Ring G75 74.4 x 3.1 for Boilers and Water Heaters quantity
Navien 30028036A Flame Rod for NPE and NCB Series

Navien

SKU: 30028036A
$22.20
MSRP: $25.53
You save 13%
Navien 30028036A Flame Rod for NPE and NCB Series quantity
Navien 30027108A Ignitor for NFB-H and NFC-H Series Boilers

Navien

SKU: 30027108A
$22.46
MSRP: $25.83
You save 15%
Read more
Navien 30023954A High Limit Sensor for NPE & NCB-E Tankless Water Heaters – OEM Replacement

Navien

SKU: 30023954A
$2.37
MSRP: $2.73
You save 15%
Navien 30023954A High Limit Sensor for NPE & NCB-E Tankless Water Heaters – OEM Replacement quantity
Navien 30022787A Flame Rod NPN – OEM Replacement for NPN Series Tankless Water Heaters

Navien

SKU: 30022787A
$8.00
MSRP: $9.20
You save 15%
Read more
Navien 30013336A Wire Harness for Control Board – NCB, NCB-E & NPE Tankless Water Heaters – OEM Replacement

Navien

SKU: 30013336A
$4.43
MSRP: $5.09
You save 13%
Navien 30013336A Wire Harness for Control Board – NCB, NCB-E & NPE Tankless Water Heaters – OEM Replacement quantity
Navien 30015446A S.H. Strainer Assembly for NCB-E Tankless Water Heaters – OEM Replacement

Navien

SKU: 30015446A
$17.52
MSRP: $20.15
You save 15%
Navien 30015446A S.H. Strainer Assembly for NCB-E Tankless Water Heaters – OEM Replacement quantity
Navien 30015307A Grundfos Pump for NCB & NCB-E Tankless Water Heaters – OEM Replacement

Navien

SKU: 30015307A
$158.12
MSRP: $181.84
You save 15%
Navien 30015307A Grundfos Pump for NCB & NCB-E Tankless Water Heaters – OEM Replacement quantity
Navien 30014699A Water Pressure Sensor for NCB, NCB-E & NPE Tankless Water Heaters – OEM Replacement

Navien

SKU: 30014699A
$29.31
MSRP: $33.71
You save 15%
Navien 30014699A Water Pressure Sensor for NCB, NCB-E & NPE Tankless Water Heaters – OEM Replacement quantity
Navien 30014189B Flame Sensor & Ignitor Kit for NCB/NCB-E & NPE Models – OEM Replacement

Navien

SKU: 30014189B
$11.13
MSRP: $12.80
You save 15%
Read more
Navien 30011690D PCB Board for NPE Models KDC-330-6M – OEM Replacement

Navien

SKU: 30011690D
$173.25
MSRP: $199.24
You save 13%
Navien 30011690D PCB Board for NPE Models KDC-330-6M – OEM Replacement quantity
Navien 30002577A High Limit Switch – Replacement Boiler & Water Heater Safety Part

Navien

SKU: 30002577A
$3.77
MSRP: $4.34
You save 15%
Navien 30002577A High Limit Switch – Replacement Boiler & Water Heater Safety Part quantity

Why Choose Navien Heating Systems?

Factory-Leading Condensing Efficiency

Condensing technology and stainless-steel heat exchangers deliver top-tier efficiency and reliable long-term output.

Compact and Flexible

Wall-hung designs and flexible venting make replacements and upgrades easier, especially in tight mechanical spaces.

Strong Contractor Support

Partner programs, training, priority tech-lines and materials to help you install confidently and differentiate your service offering.

Low-Emission and Future-Ready

Low NOx operation and efficiency-focused engineering align with current energy standards and homeowner expectations.

Broad Product Platform

Tankless, combi-boilers, heat pumps, and water-heating solutions let you standardize one premium brand across multiple job types and upsell opportunities.

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Why Choose Navien Heating Systems?