Superior
Gas Water Heater

Model # 8-40-NQRT6 Official Superior gas water heater

Here are the diagrams and repair parts for Official Superior 8-40-NQRT6 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 33 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.
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$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
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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 9000371
Flue baffle

Part #9000371

In Stock
Base Stand 9001421
#27

Functional replacement parts diagram

Base stand

Part #9001421

In Stock
Access Bolt 9000928
#23

Functional replacement parts diagram

Access bolt

Part #9000928

This item is not returnable
In Stock
Box 9000356
#2

Functional replacement parts diagram

Box

Part #9000356

This item is not returnable
In Stock
Access Cover 9001764
#22

Functional replacement parts diagram

Access cover

Part #9001764

This item is not returnable
In Stock
Access 9000927
#24

Functional replacement parts diagram

Access

Part #9000927

This item is not returnable
In Stock
Rexel Pan Base 9001609
#26A

Functional replacement parts diagram

Rexel pan base

Part #9001609

Replaced by #100108616

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Manufacturer substitution
This part replaces 9001609. 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…

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