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Pressure Washer Fittings & Couplers

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Original price $13.99 - Original price $13.99
Original price
$13.99
$13.99 - $13.99
Current price $13.99

Mi-T-M 23-0002 Hose Fitting – Coupler 1/4f X 1/4f Hex-Brass

Mi-T-M
In stock

Hose Fitting – Coupler 1/4f X 1/4f Hex-Brass. Genuine Mi-T-M factory part. Check fitment against your equipment's parts diagram or operator manual ...

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Original price $13.99 - Original price $13.99
Original price
$13.99
$13.99 - $13.99
Current price $13.99
Original price $22.00 - Original price $22.00
Original price
$22.00
$22.00 - $22.00
Current price $22.00

Mi-T-M AW-0024-0251 Hose Fitting – 3/8 Fnpt X 1/4 Bsp-M

Mi-T-M
In stock

Hose Fitting – 3/8 Fnpt X 1/4 Bsp-M. Genuine Mi-T-M factory part. Check fitment against your equipment's parts diagram or operator manual before or...

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Original price $22.00 - Original price $22.00
Original price
$22.00
$22.00 - $22.00
Current price $22.00
Original price $22.00 - Original price $22.00
Original price
$22.00
$22.00 - $22.00
Current price $22.00

Mi-T-M AW-0023-0490 Hose Fitting – 3/8" Fnpt X M22 Screw Coupler

Mi-T-M
In stock

Hose Fitting – 3/8" Fnpt X M22 Screw Coupler. Genuine Mi-T-M factory part. Check fitment against your equipment's parts diagram or operator manual ...

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Original price $22.00 - Original price $22.00
Original price
$22.00
$22.00 - $22.00
Current price $22.00
Original price $17.00 - Original price $17.00
Original price
$17.00
$17.00 - $17.00
Current price $17.00

Mi-T-M AW-0023-0487 Hose Fitting – 1/4" Mnpt X M22 Screw Coupler

Mi-T-M
In stock

Hose Fitting – 1/4" Mnpt X M22 Screw Coupler. Genuine Mi-T-M factory part. Check fitment against your equipment's parts diagram or operator manual ...

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Original price $17.00 - Original price $17.00
Original price
$17.00
$17.00 - $17.00
Current price $17.00
Original price $59.99 - Original price $59.99
Original price
$59.99
$59.99 - $59.99
Current price $59.99

Mi-T-M AW-0023-0507 Hose Fitting – Blister Pack-Swivel Coupler

Mi-T-M
In stock

Hose Fitting – Blister Pack-Swivel Coupler. Genuine Mi-T-M factory part. Check fitment against your equipment's parts diagram or operator manual be...

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Original price $59.99 - Original price $59.99
Original price
$59.99
$59.99 - $59.99
Current price $59.99
Original price $63.00 - Original price $63.00
Original price
$63.00
$63.00 - $63.00
Current price $63.00

Mi-T-M 50-0208 Hose Fitting – Pivot Coupler-Brass-Cw Only

Mi-T-M
In stock

Hose Fitting – Pivot Coupler-Brass-Cw Only. Genuine Mi-T-M factory part. Check fitment against your equipment's parts diagram or operator manual be...

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Original price $63.00 - Original price $63.00
Original price
$63.00
$63.00 - $63.00
Current price $63.00
Original price $29.00 - Original price $29.00
Original price
$29.00
$29.00 - $29.00
Current price $29.00

Mi-T-M 50-0201 Hose Fitting – Qc Gutter Cleaner

Mi-T-M
In stock

Hose Fitting – Qc Gutter Cleaner. Genuine Mi-T-M factory part. Check fitment against your equipment's parts diagram or operator manual before order...

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Original price $29.00 - Original price $29.00
Original price
$29.00
$29.00 - $29.00
Current price $29.00
Original price $32.00 - Original price $32.00
Original price
$32.00
$32.00 - $32.00
Current price $32.00

Mi-T-M AW-4070-0005 Hose Fitting – Pump Winterizing Fitting

Mi-T-M
In stock

Hose Fitting – Pump Winterizing Fitting. Genuine Mi-T-M factory part. Check fitment against your equipment's parts diagram or operator manual befor...

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Original price $32.00 - Original price $32.00
Original price
$32.00
$32.00 - $32.00
Current price $32.00
Original price $294.00 - Original price $294.00
Original price
$294.00
$294.00 - $294.00
Current price $294.00

Mi-T-M 50-0210 Hose Fitting – Ball Valve-3/8 Qc Plug &Skt

Mi-T-M
In stock

Hose Fitting – Ball Valve-3/8 Qc Plug &Skt. Genuine Mi-T-M factory part. Check fitment against your equipment's parts diagram or operator manua...

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Original price $294.00 - Original price $294.00
Original price
$294.00
$294.00 - $294.00
Current price $294.00
Original price $297.99 - Original price $297.99
Original price
$297.99
$297.99 - $297.99
Current price $297.99

Mi-T-M 50-0177 Hose Fitting – Stack Adapter Assy

Mi-T-M
In stock

Hose Fitting – Stack Adapter Assy. Genuine Mi-T-M factory part. Check fitment against your equipment's parts diagram or operator manual before orde...

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Original price $297.99 - Original price $297.99
Original price
$297.99
$297.99 - $297.99
Current price $297.99

Pressure Washer Fittings and Couplers That Match Your Thread Standard

Most pressure washer leaks are not hose failures or pump failures. They are fittings: a coupler with a flattened o-ring, an adapter cross-threaded once and never sealed again, or a quick connect from a different standard forced into place. This range covers quick connect plugs and sockets, M22 screw couplers, NPT and BSP adapters, ball valves, swivels and winterizing fittings.

Know Which Standard the Machine Uses Before Ordering

Commercial machines mix several connection standards, and they are close enough in size to look interchangeable while not sealing. M22 screw couplers are common on European-designed pumps. Quick connect plugs and sockets in 3/8" are the working standard on most commercial setups in the field. NPT threads are tapered and seal on the thread itself; BSP parallel threads seal on a face or washer, and the two do not mate reliably even when they start. Measure and identify before ordering rather than after a fitting will not seat.

Brass, Stainless and Where the Distinction Matters

Brass fittings are common, inexpensive and entirely adequate on cold water machines. On hot water units, some brass couplers are rated cold-water-only and will fail with heat. Stainless costs more and earns it on hot water, on units running detergents and on anything used near salt. When replacing a fitting on a hot water machine, check the rating on the part rather than assuming it matches what came out.

Swivels and Ball Valves Solve Specific Problems

A swivel between gun and hose stops the hose twisting as an operator turns, which reduces kinking and the fatigue that comes from fighting a coiled line all day. Inline ball valves let flow be shut off at the gun end without stopping the machine, useful when changing a surface cleaner or nozzle mid-job. Winterizing fittings let antifreeze be drawn through the pump before storage, which is the difference between a machine that starts in spring and one with a cracked head.

Keep spare o-rings for every quick connect size in use. They are the cheapest part on the machine and the most common single cause of a drip that gets ignored until it becomes a spray. A coupler that has been cross-threaded once will usually never seal again no matter how hard it is tightened, and forcing it only damages the mating part as well. Replace both halves of a pair when one has been distorted, and check that plug and socket share a standard before assuming either is faulty.

Related: Pressure Washer Hoses, Pressure Washer Guns & Wands, Pressure Washer Parts & Accessories, Pressure Washer Nozzles, Commercial Pressure Washers.

Frequently Asked Questions

What size are pressure washer quick connect fittings?
3/8" quick connect plugs and sockets are the working standard on most commercial machines. M22 screw couplers appear on many European-designed pumps. Identify which the machine uses before ordering, as they are similar enough in size to look interchangeable.
Can I mix NPT and BSP pressure washer fittings?
No. NPT threads are tapered and seal on the thread; BSP parallel threads seal on a face or washer. They can start together but will not seal reliably.
Do I need brass or stainless steel fittings?
Brass is fine on cold water machines. Some brass couplers are rated cold-water-only and fail on hot water units, so check the part rating for hot water, detergent use, or anywhere near salt, where stainless is the safer choice.
Why does my pressure washer leak at the coupler?
Most often a flattened or nicked o-ring rather than a faulty coupler. Replace o-rings at the first drip. A mismatched thread standard is the other common cause.
What is a winterizing fitting for?
It lets antifreeze be drawn through the pump before storage. Water left in a pump over a hard freeze can crack the head, which costs far more than the fitting.

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