Miller Weldcraft TIG breakdown

Miller WP-20 / Weldcraft W-250 TIG Parts Breakdown

Use this WP-20 / W-250 breakdown to identify water-cooled torch body parts, hoses, cups, collets, gas lenses, and back caps.

Torch family

WP-20 / Weldcraft W-250 water-cooled TIG torch path.

Consumable system

9/20 style cups, collets, collet bodies, gas lenses, large-diameter gas lenses, and back caps.

Fitment risk

Verify coolant flow, power cable, water hose, and gas hose before blaming front-end parts.

Part number lookup

Parts List

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Item # Part # Description Qty Buy
Torch body WP-20
Weldcraft W-250 torch body, formerly WP-20
torch body Verify water hose, gas hose, and cooler setup before ordering.
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Torch body WP-20V
Weldcraft W-250 valve torch body, formerly WP-20V
torch body Confirm valve body and cooler setup.
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Handle 53N06
Knurled handle for W-250 / WP-20 package
handle
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Handle 53N06R
Ribbed handle for W-250 valve package
handle
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Valve VS-2
Valve used on WP-20V valve torch body
valve
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Power cable 45V03HD
12.5 ft vinyl power cable
cable
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Power cable 45V04HD
25 ft vinyl power cable
cable
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Power cable 45V03RR
12.5 ft braided rubber power cable
cable
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Power cable 45V04RR
25 ft braided rubber power cable
cable
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Water hose 45V07HD
12.5 ft vinyl water hose
water hose
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Water hose 45V08HD
25 ft vinyl water hose
water hose
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Gas hose 45V09
12.5 ft vinyl gas hose
gas hose
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Gas hose 45V10HD
25 ft vinyl gas hose
gas hose
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1 598882
Insulator for WP-9 / WP-20 non-gas lens and gas lens setups
insulator Used across the 9/20 consumable chart.
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2 13N20
WP-9 / WP-20 collet - .020 in.
collet Match tungsten diameter.
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2 13N21
WP-9 / WP-20 collet - .040 in.
collet Match tungsten diameter.
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2 13N22
WP-9 / WP-20 collet - 1/16 in.
collet Match tungsten diameter.
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2 13N23
WP-9 / WP-20 collet - 3/32 in.
collet Match tungsten diameter.
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2 13N24
WP-9 / WP-20 collet - 1/8 in.
collet Match tungsten diameter.
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3 13N25
WP-9 / WP-20 collet body - .020 in.
collet body Use with non-gas-lens setup.
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3 13N26
WP-9 / WP-20 collet body - .040 in.
collet body Use with non-gas-lens setup.
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3 13N27
WP-9 / WP-20 collet body - 1/16 in.
collet body Use with non-gas-lens setup.
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3 13N28
WP-9 / WP-20 collet body - 3/32 in.
collet body Use with non-gas-lens setup.
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3 13N29
WP-9 / WP-20 collet body - 1/8 in.
collet body Use with non-gas-lens setup.
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4 13N08
WP-9 / WP-20 alumina cup - #4 alumina cup
cup Verify nozzle size and torch front end.
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4 13N09
WP-9 / WP-20 alumina cup - #5 alumina cup
cup Verify nozzle size and torch front end.
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4 13N10
WP-9 / WP-20 alumina cup - #6 alumina cup
cup Verify nozzle size and torch front end.
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4 13N11
WP-9 / WP-20 alumina cup - #7 alumina cup
cup Verify nozzle size and torch front end.
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4 13N12
WP-9 / WP-20 alumina cup - #8 alumina cup
cup Verify nozzle size and torch front end.
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4 13N13
WP-9 / WP-20 alumina cup - #10 alumina cup
cup Verify nozzle size and torch front end.
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5 45V41
WP-9 / WP-20 gas lens - .020 in.
gas lens Use with gas lens cups and correct insulator.
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5 45V42
WP-9 / WP-20 gas lens - .040 in.
gas lens Use with gas lens cups and correct insulator.
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5 45V43
WP-9 / WP-20 gas lens - 1/16 in.
gas lens Use with gas lens cups and correct insulator.
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5 45V44
WP-9 / WP-20 gas lens - 3/32 in.
gas lens Use with gas lens cups and correct insulator.
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5 45V45
WP-9 / WP-20 gas lens - 1/8 in.
gas lens Use with gas lens cups and correct insulator.
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6 53N58
WP-9 / WP-20 alumina gas lens cup - #4
cup Use with gas lens setup only.
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6 53N59
WP-9 / WP-20 alumina gas lens cup - #5
cup Use with gas lens setup only.
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6 53N60
WP-9 / WP-20 alumina gas lens cup - #6
cup Use with gas lens setup only.
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6 53N61
WP-9 / WP-20 alumina gas lens cup - #7
cup Use with gas lens setup only.
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6 53N61S
WP-9 / WP-20 alumina gas lens cup - #8 short
cup Use with gas lens setup only.
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7-10 54N63-20
WP-9 / WP-20 large-diameter gas lens part - large-diameter gas lens insulator
large gas lens Do not mix with standard gas lens parts.
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7-10 13N20L
WP-9 / WP-20 large-diameter gas lens part - .020 in. large-diameter collet
large gas lens Do not mix with standard gas lens parts.
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7-10 13N21L
WP-9 / WP-20 large-diameter gas lens part - .040 in. large-diameter collet
large gas lens Do not mix with standard gas lens parts.
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7-10 13N22L
WP-9 / WP-20 large-diameter gas lens part - 1/16 in. large-diameter collet
large gas lens Do not mix with standard gas lens parts.
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7-10 13N23L
WP-9 / WP-20 large-diameter gas lens part - 3/32 in. large-diameter collet
large gas lens Do not mix with standard gas lens parts.
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7-10 13N24L
WP-9 / WP-20 large-diameter gas lens part - 1/8 in. large-diameter collet
large gas lens Do not mix with standard gas lens parts.
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7-10 45V0204S
WP-9 / WP-20 large-diameter gas lens part - .020/.040 large gas lens
large gas lens Do not mix with standard gas lens parts.
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7-10 45V116S
WP-9 / WP-20 large-diameter gas lens part - 1/16 in. large gas lens
large gas lens Do not mix with standard gas lens parts.
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7-10 45V64S
WP-9 / WP-20 large-diameter gas lens part - 3/32 in. large gas lens
large gas lens Do not mix with standard gas lens parts.
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7-10 995795S
WP-9 / WP-20 large-diameter gas lens part - 1/8 in. large gas lens
large gas lens Do not mix with standard gas lens parts.
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11-13 41V33
WP-9 / WP-20 back cap - short back cap
back cap Choose by clearance and tungsten length.
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11-13 41V35
WP-9 / WP-20 back cap - medium back cap
back cap Choose by clearance and tungsten length.
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11-13 41V24
WP-9 / WP-20 back cap - long back cap
back cap Choose by clearance and tungsten length.
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Replace first

Common Wear Guidance

1. Verify coolant flow

A hot WP-20 often points to cooler flow, hose, or cable issues before the cup or collet.

2. Check collet and gas lens

Loose tungsten or poor gas coverage usually starts at the front-end consumable stack.

3. Inspect hoses and cable

Look for heat damage, kinks, or incorrect water/gas hose routing.

Verify fitment

Check Before Ordering

Verify cooler setup

Confirm water-cooled machine/cooler support before ordering a WP-20 torch package.

Verify front-end style

Standard, gas lens, and large-diameter gas lens setups require different parts.

Amazon status

Amazon links are optional buying references only. Unverified matches stay blocked.

Related consumables

WP-9 / A-125 Breakdown

Shares the 9/20 consumable chart with an air-cooled torch path.

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Miller Water-Cooled TIG Support

Open water-cooled TIG torch support.

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Miller TIG Support

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Need More Help? Troubleshooting, FAQs, and deeper TIG setup notes

TIG unstable arc

Inspect tungsten contamination, collet tightness, gas coverage, and work connection first.

Open troubleshooting

TIG torch overheating

Verify amperage range, cooling flow on water-cooled torches, and front-end fitment.

Open troubleshooting

TIG gas coverage

Cup size, gas lens seating, flow rate, and drafts are the common checks.

Open TIG support