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Dunkirk
Boiler

Model # 4EW1.25Z Official Dunkirk boiler

Here are the diagrams and repair parts for Official Dunkirk 4EW125Z boiler, as well as links to manuals and error code tables, if available.

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  • In the search box below, enter all or part of the part number or the part’s name.

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

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For DIY troubleshooting advice and repair guides, visit our repair help section.

Installation guide
Owner’s manual
Error Codes

Model diagram and schematic

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ALL PARTS
Showing 10 of 58 parts  |
Relief Valve 146-22-011
#1

Optional tankless coil water heater diagram

Relief valve

Part #146-22-011

Replaced by #10-408-05

?
Manufacturer substitution
This part replaces 146-22-011. Substitute parts can look different from the original.
$44.77 | 
10% OFF Phone Price : $49.77
In Stock
Coil Conversin Kit (adds Tankless Coil To Non-coil Boiler, Containes Items 15,16 And Control Well) 550003211

#NI03

All parts diagram

Coil conversin kit (adds tankless coil to non-coil boiler, containes items 15,16 and control well)

Part #550003211

$719.25
In Stock
Dunkirk Pnl Side Rt Ewii 4 Sect Blue 42500245AC
#1

Side panels diagram

Dunkirk pnl side rt ewii 4 sect blue

Part #42500245AC

$128.34
In Stock
Dunkirk Pnl Rear Ewii Blue 42500269AC
#2

Side panels diagram

Dunkirk pnl rear ewii blue

Part #42500269AC

$136.28
In Stock
Dunkirk Assy Jkt Blu Ewii 4 42600290AC
#XX

Side panels diagram

Dunkirk assy jkt blu ewii 4

Part #42600290AC

$494.23
In Stock
Dunkirk Pnl Top Ewii 4 Sect Blue 42500255AC
#3

Side panels diagram

Dunkirk pnl top ewii 4 sect blue

Part #42500255AC

$109.82
In Stock
Dunkirk Hh 43834 Nut HW-003.02
#6

Water boiler diagram

Dunkirk hh 43834 nut

Part #HW-003.02

This item is not returnable
$6.37
In Stock
Long Control Well For Front Supply Tapping 240007709
#5C

Optional tankless coil water heater diagram

Long control well for front supply tapping

Part #240007709

$49.51
In Stock
Dunkirk Pnl Frnt Lwr Ewii Blue 42500268AC
#9

Side panels diagram

Dunkirk pnl frnt lwr ewii blue

Part #42500268AC

$49.51
In Stock
Limit Control Hydrolevel 3250 With Sensor 240010867
#5A

Optional tankless coil water heater diagram

Limit control hydrolevel 3250 with sensor

Part #240010867

$345.23
In Stock

Symptoms for water softeners

Choose a symptom to see related water softener repairs.

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Why does my water softener overflow?

Main causes: faulty brine valve assembly, bad rotor valve…

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Why is my softened water salty?

Main causes: clogged drain hose, faulty rotor valve, leaky rotor valve seals…

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Why isn't my water softener using salt?

Main causes: salt bridge inside the salt tank, bad timer, valve motor failure, faulty rotor valve, clogged venturi…

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Why does my water softener leak water?

Main causes: loose water line connections, cracked water-carrying components, bad rotor valve seals…

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Why is there no display on my water softener?

Main causes: lack of electrical power, bad power transformer, faulty timer…

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Why isn't my water softener softening my water?

Main causes: empty salt tank, salt bridge, depleted resin, clogged or damaged venturi, broken rotor position switch, fai…

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Why are water softener resin beads in my water?

Main causes: broken resin tank screen, bad resin tank seals, cracked upper distributor in resin tank…

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Why isn't my water softener meter working?

Main causes: broken water flow meter, faulty timer, water flow to softener is bypassed…

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Repair guides for water softeners

These step-by-step repair guides will help you safely fix what’s broken on your water softener.

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How to replace a water softener venturi

How to replace a water softener venturi

The venturi valve in your water softener draws brine water from the salt tank to the resin tank for regeneration. Follow…

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Repair difficulty
Time required
 15 minutes or less
How to replace a water softener rotor position switch

How to replace a water softener rotor position switch

The rotor position switch detects the position of the valve rotor. If the rotor position switch fails, follow these step…

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Repair difficulty
Time required
 30 minutes or less
How to replace a water softener timer

How to replace a water softener timer

The timer is the control board you use to program the water softener. If the timer isn’t accepting commands when you pus…

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Repair difficulty
Time required
 15 minutes or less

Articles and videos for water softeners

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

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Wiring schematic symbols explained video

Wiring schematic symbols explained video

Learn some of the most common symbols found in a wiring diagram and what they mean.…

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How to use a multimeter to test electrical parts video

How to use a multimeter to test electrical parts video

Learn how to use a multimeter to check for wiring problems in an appliance that's not working…

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How to clean a water softener

How to clean a water softener

Keeping a water softener clean inside and out improves operation and appearance.…

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