Boss
Gas Water Heater

Model # 5-50-NXRT6 Official Boss gas water heater

Here are the diagrams and repair parts for Official Boss 5-50-NXRT6 gas water heater, as well as links to manuals and error code tables, if available.

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Not all parts are shown on the diagrams—those parts are labeled NI, for “not illustrated”.

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Model diagram and schematic

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Showing 10 of 30 parts  |

Water Heater Temperature And Pressure Relief Valve 9000071
#20

Functional replacement parts diagram

Water heater temperature and pressure relief valve

Part #9000071

Replaced by #9000071015

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Manufacturer substitution
This part replaces 9000071. Substitute parts can look different from the original.
BEST SELLER
$14.36
12% OFF Phone Price : $16.36
In Stock
Water Heater Thermocouple 9000283
#14

Functional replacement parts diagram

Water heater thermocouple

Part #9000283

Replaced by #H06E-36

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Manufacturer substitution
This part replaces 9000283. Substitute parts can look different from the original.
This item is not returnable
$14.52
12% OFF Phone Price : $16.52
Back Order
Water Heater Manifold Inner Door 9000281
#18

Functional replacement parts diagram

Water heater manifold inner door

Part #9000281

$17.69
10% OFF Phone Price : $19.69
In Stock
Flue Baffle 9001207
#8A

Functional replacement parts diagram

Flue baffle

Part #9001207

In Stock
Box 9000356
#2

Functional replacement parts diagram

Box

Part #9000356

This item is not returnable
In Stock
Baffle 9000945
#8

Functional replacement parts diagram

Baffle

Part #9000945

In Stock
Dip Tube 9001699
#5

Functional replacement parts diagram

Dip tube

Part #9001699

Replaced by #100108806

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Manufacturer substitution
This part replaces 9001699. Substitute parts can look different from the original.
In Stock
Drain Pan 9000743
#26B

Functional replacement parts diagram

Drain pan

Part #9000743

The manufacturer no longer makes this part, and there's no substitute part

Heater Stand 9001422
#27A

Functional replacement parts diagram

Heater stand

Part #9001422

Replaced by #9005744005

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Manufacturer substitution
This part replaces 9001422. Substitute parts can look different from the original.
In Stock
Water Heater Burner 9000390
#16A

Functional replacement parts diagram

Water heater burner

Part #9000390

Replaced by #100108399

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Manufacturer substitution
This part replaces 9000390. Substitute parts can look different from the original.
In Stock

Most common symptoms to help you fix your water heaters

Choose a symptom to see related water heater repairs.

Main causes: lack of power, no gas supply, thermostat limit switch tripped, bad element, bad thermostat, gas valve failu…

Main causes: loose water pipe fittings, leaky drain valve, bad temperature-pressure relief valve, leaky heating element,…

Main causes: water supply needs chlorine treatment, anode rod too reactive…

Main causes: broken heating element, thermostat failure, excessive tank sediment, tank size too small, burner valve asse…

Main causes: faulty pressure relief valve, water is overheating…

Main causes: thermostats need adjustment, water heater capacity too low, bad heating element, thermostat failure, excess…

Main causes: thermostat temperature set too high, thermostats need adjustment, faulty thermostat, shorted heating elemen…

Effective articles & videos to help repair your water heaters

Use the advice and tips in these articles and videos to get the most out of your water heater.

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How to read a wiring schematic video

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Easy DIY water heater repairs

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Water heater common questions

Water heater common questions

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