Best Quick Connect for Pressure Washer Gun (2026)
Five quick connect kits for pressure washer guns, in brass and stainless steel, compared by material, size, piece count and stated PSI figures.
On this page
Top picks at a glance
As an Amazon Associate I earn from qualifying purchases.
- 1
Best OverallMcKillans Brass M22 Kit9.5/10View on Amazon - 2
Best StainlessMcKillans Stainless QC9.5/10View on Amazon - 3
Most PiecesRaincovo 3/8 in 8-Pack9.5/10View on Amazon - 4
Best 4-PackLIULO TOOL SS 4-Pack9.4/10View on Amazon - 5
Best for 1/4 inPetutu M22 Brass 4-Pc9.4/10View on Amazon - 6
3/8 Inch Pressure Washer Quick Connect FittingsView on Amazon - 7
Pressure WasherView on Amazon - 8
Compact Quick-Connect SystemView on Amazon
Washing the driveway, the barn floor and the truck means swapping between the gun, the hose and different nozzles, and unthreading fittings by hand every time gets old fast. The best quick connect for pressure washer gun is the set that turns those threaded joints into snap connections: push the collar back, seat the plug, and you are washing. Five quick connect kits in brass and stainless steel, built around the M22-14mm and 3/8 in sizes most gas pressure washers use, and compared here on materials, stated PSI figure and what each listing actually tells you.
AcreMowerLab earns a commission when you shop through links here. It never changes your price. Affiliate disclosure.
Quick picks
- Best Overall McKillans Brass M22 Kit: Highest Acre Score here: brass kit with Viton O-rings and a 1-year residential warranty Check price on Amazon
- Best Stainless McKillans Stainless QC: 304 stainless steel with Viton O-rings, a full quick connect conversion kit Check price on Amazon
- Most Pieces Raincovo 3/8 in 8-Pack: 8 stainless pieces in 3/8 in, rated to 5000 PSI Check price on Amazon
- Best 4-Pack LIULO TOOL SS 4-Pack: Stainless 4-pack with M22 14mm swivels, up to 5,000 PSI Check price on Amazon
- Best for 1/4 in Petutu M22 Brass 4-Pc: Brass 2-pair set for M22-14mm to 1/4 in nozzles, up to 5,000 PSI Check price on Amazon
Our acreage picks
McKillans M22-14mm to 3/8 in Brass Quick Connect Kit
Brass M22-14mm to 3/8 in quick connect kit with Viton O-rings and a 1-year residential warranty, covering gun, hose and pump connections.
Who it's for: owners of a gas washer who want every connection converted to quick connects in one box, with a warranty behind it.
Who should skip it: anyone with a 15mm electric washer, or anyone who only needs the gun-side fittings.
Read the full review
The McKillans brass kit is the most complete set here: the listing itemizes 2 M22-14mm male plugs, 2 M22-14mm female, 2 male garden hose plugs and 2 female garden hose quick connects, all machined in brass with Viton O-rings. It is rated for gas washers with standard M22-14mm hoses and carries a 1-year residential warranty, the only stated warranty of the five. One blemish: the listing disagrees with itself on piece count, claiming 2 pieces in one place against an itemized 8 elsewhere.
Pros
- 8 pieces: 2 M22 male plugs, 2 M22 female, plus garden hose quick connects
- Viton O-rings, described as temperature and chemical resistant
- Only kit here with a stated warranty: 1-year residential
- Fits all gas washers with standard M22-14mm hoses
Cons
- Listed piece count disagrees: one part of the listing says 2 pieces, another itemizes 8
- Brass, where the LIULO listing claims stainless resists damage better
- Not for 15mm electrics: Sun Joe, AR Blue, Simoniz and similar will leak
- The 8 pieces split across high-pressure and garden hose sides, not all for the gun
McKillans M22-14mm to 3/8 in Stainless Quick Connect Kit
304 stainless steel M22-14mm to 3/8 in quick connect kit with Viton O-rings for full stainless conversion.
Who it's for: gas-washer owners who want stainless everywhere for corrosion resistance.
Who should skip it: anyone who needs a stated PSI figure or warranty on the listing, or a 15mm fitting.
Read the full review
The McKillans stainless kit converts a washer's connections to stainless quick connects in one purchase, with every connector machined from 304 stainless steel and Viton O-rings. The listing stresses the 14mm, not 15mm, plug diameter and rules out electric washers from Sun Joe, AR Blue and Simoniz. It does not state a piece count, a max PSI figure or a warranty term, so you buy on materials alone.
Pros
- 304 stainless steel, described as rust and tarnish resistant
- Viton O-rings for temperature and chemical resistance
- Complete kit to convert every connection to stainless quick connects
- Fits gas washers with M22 connectors
Cons
- No piece count stated on the listing
- No warranty term stated on the listing
- No max PSI figure stated on the listing
- Not compatible with 15mm electric washers like Sun Joe and AR Blue
Raincovo 3/8 in Stainless Steel 8-Piece Quick Connect Set
8-piece stainless steel 3/8 in quick connect set with male and female NPT threads, rated to 5000 PSI.
Who it's for: owners who already run 3/8 in fittings and want stainless spares across hose, wand and valves.
Who should skip it: anyone who needs to convert M22-14mm hose ends, or a stated warranty.
Read the full review
The Raincovo set is the piece-count leader: 8 stainless steel adapters in 3/8 in, with male and female NPT threads the listing calls well made, and a stated max working pressure of 5000 PSI for hot and cold water washers. What it does not do is touch M22: there are no M22 adapters in the box, so this set suits the 3/8 in side of the system only. The listing states no warranty term and no O-ring material.
Pros
- 8 stainless pieces, the most in any set here
- Max working pressure of 5000 PSI stated
- 3/8 in NPT male and female threads, well made per the listing
- Rated for hot and cold water washers
Cons
- No M22 pieces: 3/8 in fittings only, so it will not convert an M22 hose end
- No warranty term stated on the listing
- No O-ring material stated on the listing
- Fittings suit standard 3/8 in lines, nothing larger
LIULO TOOL Stainless Steel M22 14mm Quick Connect Kit, 4 Pack
Stainless steel 4-pack converting M22 14mm swivels to 3/8 in quick connects, rated up to 5,000 PSI.
Who it's for: owners who want stainless M22-to-3/8 in conversion for the main wash line at a 4-pack size.
Who should skip it: 15mm electric washer owners, or anyone who wants a warranty on the listing.
Read the full review
The LIULO TOOL kit is a 4-pack: 2 M22-14 plus 3/8 in plugs and 2 3/8 in quick disconnects with M22 male ends, all in stainless steel the listing calls more damage-resistant than brass, anti-rust and high hardness. Working pressure is stated up to 5,000 PSI, and the M22 swivel suits gun, hose and pump connections. The listing warns the 14mm fitting will leak on 15mm electrics, and it states no warranty term or O-ring material.
Pros
- Stainless steel, claimed more damage-resistant than brass
- Up to 5,000 PSI working pressure stated
- M22 14mm swivel ends suit gun, hose and pump connections
- Anti-rust and anti-corrosion, per the listing
Cons
- Not compatible with M22 15mm electric washers
- No warranty term stated on the listing
- No O-ring material stated on the listing
- 4 pieces cover fewer joints than the 8-piece sets
Petutu M22-14mm to 1/4 in Brass Quick Connect Adapters, 2 Pair
Lead-free brass 2-pair set adapting M22-14mm to 1/4 in, for nozzles and spray guns, up to 5,000 PSI.
Who it's for: owners whose guns and nozzles run 1/4 in fittings and want a simple brass conversion.
Who should skip it: anyone on 3/8 in fittings, or anyone who wants stainless steel.
Read the full review
The Petutu set is the specialist of the group: 2 pair of lead-free brass adapters taking M22-14mm to 1/4 in, made for 1/4 in nozzles and spray guns, with a working pressure up to 5,000 PSI. The listing is explicit that it does not fit 3/8 in, and that the 14mm swivel is not a 15mm fitting. It states no warranty term, and at 0.1 kg it is the lowest stated weight here.
Pros
- Lead-free brass, rated up to 5,000 PSI
- Adapts M22-14mm to 1/4 in nozzles and spray guns
- 2 pair covers pump outlet, hose and gun joints
- Snap connection instead of threading, per the listing
Cons
- Does not fit 3/8 in connections
- No warranty term stated on the listing
- Lowest stated weight here at 0.1 kg, brass where others offer stainless
- Brass only: no stainless option in this listing
Other machines to compare
3/8 Inch Pressure Washer Quick Connect FittingsCheck price on Amazon
Pressure WasherCheck price on Amazon
Compact Quick-Connect SystemCheck price on Amazon
Side-by-side specs
| Model | Acre Score | Material | Size | Pieces | Max PSI | Warranty |
|---|---|---|---|---|---|---|
| McKillans Brass M22 Kit | 9.5/10 | Brass | M22-14mm to 3/8 in | 8 | Not stated | 1-year residential |
| McKillans Stainless QC | 9.5/10 | 304 stainless steel | M22-14mm to 3/8 in | Not stated | Not stated | Not stated |
| Raincovo 3/8 in 8-Pack | 9.5/10 | Stainless steel | 3/8 in | 8 | 5000 PSI | Not stated |
| LIULO TOOL SS 4-Pack | 9.4/10 | Stainless steel | M22-14mm to 3/8 in | 4 | 5,000 PSI | Not stated |
| Petutu M22 Brass 4-Pc | 9.4/10 | Lead-free brass | M22-14mm to 1/4 in | 4 | 5,000 PSI | Not stated |
Specifications are manufacturer rated as listed, collected 23 October 2026.
Acreage and terrain fit
McKillans Brass M22 Kit
McKillans Stainless QC
Raincovo 3/8 in 8-Pack
LIULO TOOL SS 4-Pack
Petutu M22 Brass 4-Pc
Buying guide: choosing the best quick connect for pressure washer gun
Match the thread size first
Four of the five kits center on M22-14mm, the fitting most gas washers use. The critical detail the listings repeat: the male plug measures 14mm, not 15mm, and a 15mm fitting will leak on a 14mm quick connect. Several electric washers, including Sun Joe, AR Blue and Simoniz models per the McKillans listings, use M22-15mm hoses that these kits do not fit. The other fork is 1/4 in versus 3/8 in: the Petutu set adapts M22-14mm to 1/4 in nozzles and guns and does not fit 3/8 in, while the other four work with 3/8 in connections. The pressure washer nozzle guide covers the business end of the 1/4 in side.
Brass or stainless steel
Two kits here are brass and three are stainless steel. The LIULO listing claims stainless steel is more damage-resistant than brass, and McKillans describes its stainless kit as 304 grade that does not rust or tarnish. Brass has the practical edge of the only stated warranty here: the McKillans brass kit carries a 1-year residential warranty. Both McKillans kits, and no others, mention Viton O-rings, described as temperature and chemical resistant.
What 5,000 PSI means here
Three listings state a max working pressure of 5,000 PSI: Petutu, LIULO TOOL and Raincovo. The two McKillans kits state no pressure figure at all, which is a gap worth noting, since the figure is what tells you the fitting belongs on a high-pressure line. Match the figure to what PSI pressure washer you need before you buy. Never aim a pressure washer at people or animals, and run gas units outdoors only.
Garden hose pieces vs high-pressure pieces
The McKillans brass kit is the only one that includes garden hose quick connects alongside the M22 pieces: 2 male garden hose plugs and 2 female garden hose QC. Those suit the low-pressure water supply side, not the high-pressure line to the gun. Note the listing disagrees on piece count: one part says 2 pieces, while the itemized list shows 8: 2 M22 male plugs, 2 M22 female, 2 garden hose plugs and 2 garden hose QC.
Never point the spray at people, animals or yourself: the stream can cut skin. Run gas pressure washers outdoors only, far from doors, windows and vents, because engine exhaust carries carbon monoxide. Start with the widest nozzle and keep electric units on a GFCI outlet. Refuel only with the engine off and cool. See CPSC carbon monoxide guidance. Read our Safety Disclaimer.
Matching It to Your Property
- Driveway and patio washing on flat concrete: any of these kits covers the gun-to-hose joint; pick the thread size your washer uses first.
- Equipment yards with vehicles and implements to work around: quick connects cut the time spent threading and unthreading fittings when you swap nozzles.
- Storage in the shop: these are small parts, so keep a spare pair with the washer and a lost plug will not end the wash day.
- Gas washers with M22 hoses: the M22-14mm kits fit. If your washer uses a 15mm fitting, none of the M22 kits here will seal, so measure before you order.
The Acre Score explained
The Acre Score weighs five factors: performance (materials and stated PSI figure), build (machining and O-ring quality per the listing), value (pieces and features for the class), safety (stated safety-relevant features) and warranty (stated term). No listing here states safety features for these fittings, so safety scores zero across the board; only the McKillans brass kit states a warranty term.
| Product | Acre Score | Perf. /35 | Build /25 | Value /25 | Safety /10 | Warranty /5 |
|---|---|---|---|---|---|---|
| McKillans Brass M22 Kit | 9.5 | 32 | 21 | 20 | 0 | 2 |
| McKillans Stainless QC | 9.5 | 32 | 22 | 18 | 0 | 0 |
| Raincovo 3/8 in 8-Pack | 9.5 | 29 | 21 | 20 | 0 | 0 |
| LIULO TOOL SS 4-Pack | 9.4 | 30 | 20 | 19 | 0 | 0 |
| Petutu M22 Brass 4-Pc | 9.4 | 28 | 19 | 20 | 0 | 0 |
Scores run from 9.2 to 9.8: each product’s point total is placed on that range, so more points always means a higher score.
FAQ: mowing large lots
What size quick connect fits a pressure washer?
Check the hose fitting on your washer first. Most gas washers use M22-14mm, and four of the kits here are built for that size. Measure the male plug: the McKillans listings warn it is 14mm, not 15mm, and some electric washers from Sun Joe, AR Blue and Simoniz use 15mm fittings that will leak on a 14mm quick connect. Then confirm the other side: 1/4 in for nozzles and guns, or 3/8 in for hoses and wands.
How do I use a quick connect on a pressure washer gun?
Fit the plug to the gun or nozzle threads once, then connect and disconnect by pushing the collar back and seating the plug, instead of threading fittings each time. The Petutu listing describes it as making the swap a snap that saves time, and notes that two connectors join the pump outlet to the hose or the hose to the gun.
How do I measure a quick connect size?
Measure the outside diameter of the male plug in millimeters. If it reads 14mm, an M22-14mm quick connect fits; if it reads 15mm, the 14mm kits here will leak, per the McKillans and LIULO listings. For the quick-disconnect side, the common sizes here are 1/4 in and 3/8 in.
Will a 15mm fitting work with an M22-14mm quick connect?
No. Every listing that mentions it says the same thing: a 14mm quick connect on a 15mm fitting will leak. If your washer needs 15mm, skip the M22-14mm kits here and find a 15mm set.
How do I keep quick connects from leaking?
Start with the right size: 14mm to 14mm, since the listings are unanimous that 15mm fittings leak on 14mm connects. Both McKillans kits use Viton O-rings, described as temperature and chemical resistant and more robust than standard O-ring rubber. The Raincovo listing credits high-precision threads for no leakage. Beyond that, the listings say nothing about maintenance, so inspect the O-rings when a connection starts to weep.
More mowing guides
- Best Pressure Washer Gun for Home Use (2026): 5 Picks
- Best Pressure Washer Nozzle for Home Use (2026): 5 Picks
- Best Pressure Washer Hose for Home Use (2026): 5 Compared
- What PSI Pressure Washer Do I Need?
- Pressure Washer Maintenance: Step-by-Step Care Guide
- Best Foam Cannon for Gas Pressure Washer (2026): 5 Picks Compared
- Best Pressure Washer Hose Reel (2026): 5 Picks Compared
- Best Telescoping Pressure Washer Wand: 5 Picks for High Reach
