Pressure Washer Quick Connects & Fittings
Stainless Steel Quick Connect Socket
Stainless Steel Quick Connect Plug
Thread Tape
Stainless Steel Hose Clamps
Poly Hose Barb - Elbow
Stainless Steel Bushing
Stainless Steel Hose Barb
Poly Plug
Viton O-Ring
Heavy Duty Ball Valve
Female Poly Tee
REMCO HB x QA Straight Fitting
Pressure Washer Plumbing Kit
Black O-Ring
3/8" High Pressure Jumper Hose
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How to Choose the Right Pressure Washer Fitting
The fitting that fails on a Saturday is the one you never thought about. Whether a fitting lasts comes down to what's in the line, how much pressure it sees, and what's threaded on the other end. Get those right and it outlives the pump.
Match the material to what's in the line
Brass and plated steel are for plain water. The brass socket holds 3,500 PSI. The plated steel plug is the cheap male side, $2 to $4, and it does the job right up until bleach hits the line. Run chlorinated water through either one and you'll be buying them again in a couple months.
Stainless is the move anywhere SH might show up. It's rated to 5,075 PSI and doesn't care about sodium hypochlorite. If your rig does any soft wash at all, even light downstream work, put stainless on the high-pressure side and forget about it. Costs a few dollars more. Lasts years.
Poly is for the chemical side, where mix sits in the line between jobs. Banjo camlocks, bulkheads, hose barbs, tees, plugs, elbows. Polypropylene won't corrode and won't react with bleach. Keep it off the high-pressure side of the pump or it'll come apart.
Size it to what's already on the rig
Most hoses use 3/8" at the hose-to-gun connection. Wand-to-tip is almost always 1/4". Big commercial rigs sometimes run 1/2" at the pump outlet, and tank fittings like bulkheads and camlocks land between 1/2" and 1" depending on your draw rate. Best way not to guess is to pull the fitting that's on there and measure the thread before you order.
Get the thread type right before you order
MPT is external threads. FPT is internal threads. MPT screws into a female port. FPT screws onto a male fitting. So look at what you're connecting to and read the threads. Internal only, you need MPT. Threads on the outside, you need FPT. One more thing trips people up. Garden hose thread isn't pipe thread, even when the sizes look close, so don't cross GHT and NPT. When you do need to run a garden hose into a barbed supply line, the MGHT brass fitting bridges it: 1" hose barb on one end, 3/4" male garden hose thread on the other.
Pressure Washer Fitting Reference Chart
| Where it goes on the rig | Recommended fitting |
|---|---|
| Wand to spray tip | 1/4" stainless steel quick connect |
| Hose to gun, pressure side | 3/8" stainless steel quick connect |
| Pump outlet to hose, commercial rigs | 3/8" or 1/2" stainless steel quick connect |
| Everyday washing, no chemicals | Brass socket or plated steel plug |
| Soft wash chemical lines, low pressure | Poly hose barb or Banjo poly camlock |
| Tank pass-through for draw or return | Poly bulkhead fitting (1/2", 3/4", or 1") |
| Remco pump plumbing (12V and 24V Zeus) | Remco HB x QA straight fitting |
| Sealing threaded NPT connections | Thread tape |
| O-ring replacement around chemicals | Viton O-ring |
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Frequently Asked Questions
What size pressure washer quick connect do I need?
3/8" at the hose-to-gun connection, 1/4" at the wand-to-tip. That covers most hoses. Bigger commercial rigs sometimes step up to 1/2" at the pump outlet. Either way, match what's already on your gear. Pull the existing fitting and measure the thread before you order.
What's the difference between MPT and FPT?
MPT is external threads. FPT is internal threads. An MPT fitting screws into an FPT port, and the other way around. So look at the port you're connecting to. Threads on the inside means MPT. Threads on the outside means FPT. Get it backward and you've got the wrong part in the box, which is the most common fitting mistake we ship a replacement for.
Should I buy brass or stainless quick connects?
Brass runs 3,500 PSI and costs less, and it's fine for plain water. Stainless runs 5,075 PSI and doesn't corrode when SH goes through it. Any soft wash or downstream injection on your rig, go stainless. The few extra dollars beat replacing brass every couple months.
Can I run poly fittings with bleach?
Yes, and that's exactly where poly belongs. The polypropylene in our hose barbs, bulkheads, tees, plugs, elbows, and Banjo camlock bodies won't react with sodium hypochlorite the way brass or rubber does. Run it on low-pressure chemical lines and tank pass-throughs, including anywhere bleach sits overnight. Keep it off the high-pressure side of the pump, where it'll blow past its rating.
Why does my fitting keep leaking?
Usually it's the O-ring. Swap to a Viton O-ring if there are chemicals in the line. After that, check the thread tape on any NPT connection and the clamp on any barb, since a stripped wrap or a loose clamp leaks the same way. Still dripping after all that? The body's cracked or the threads are stripped. Replace it instead of cranking it tighter.
What's in the Pressure Washer Plumbing Kit?
Most of the fittings a build needs, in one box: a 1" bulkhead, 1" poly hose barbs and an elbow, stainless hose clamps, an in-line filter, a ball valve, bushings, sockets, thread tape, and two hoses. Good for a new build or a pump swap. Or keep one on the truck as a field kit so you're never down for a $4 part. Guys running more than one rig keep a kit per truck.
