Accessory listings are a wall of plastic and it is hard to tell what matters. Here is the whole category, ranked by how much difference each item actually makes, with the ones not worth buying at the bottom.
Tier 1: buy these with the machine
A full nozzle tip set rated for your machine’s flow. A pressure washer has no power dial; the nozzle is the setting. This is a few dollars and it changes what the tool can safely do. Start at the color chart.
A 50-foot hose. So you move the gun instead of the machine. The single biggest quality-of-life change available.
An inlet water filter. A few dollars, screws onto the garden hose, catches the grit that kills pump valves. Pump failure is how most pressure washers die.
Tier 2: buy before you need them
A swivel connector. Stops the hose twisting into loops behind you. Everybody wishes they had bought it sooner.
An adapter set. M22 to quick connect, in both directions. Removes the “does not fit” problem permanently — which one you need.
A downstream soap injector, if your machine has no detergent tank. It is how house wash gets onto siding. Remember it only draws with the black soap tip fitted — how they work.
Tier 3: job-specific, and genuinely good
A surface cleaner, if you have flat concrete. The biggest single improvement to a driveway job, and the only thing on this page where sizing is critical — check your flow first.
A foam cannon, if you wash a car. Thick foam loosens dirt and reduces the grit your mitt drags across the paint — the picks.
A turbo nozzle, if you have concrete and no surface cleaner, or need to do edges. Fast, and genuinely destructive on wood.
An extension wand, if you have a second story. The safest accessory here, because it keeps you off a ladder — the picks.
An undercarriage cleaner, if you deal with road salt. It washes under a car without you lying on the ground, and doubles as a wide rinse bar for concrete.
Tier 4: skip these
Adjustable multi-pattern nozzles. Compromise every angle for convenience and add a failure point. Separate tips are cheaper and better.
Guns with a pressure dial. They reduce force by restricting flow, which is a worse method than changing tip or stepping back.
Sandblasting kits, unless you have a specific restoration job. They make a mess, consume media, and are nothing like as useful as they look.
Hose reels, unless you use the machine monthly. Good habits and a wall hook cover most of the benefit — if you do want one.
The buying order, in one line
Nozzle set, longer hose, inlet filter, swivel, adapters — then whichever Tier 3 item matches your actual jobs. That is roughly a hundred dollars and it does more for your results than spending the same amount stepping up one machine tier.
