Can you hydro jet your own drain pipes?

A pump, a high-pressure hose sized for the pipe, a nozzle matched to the pump, and a way into the line. The nozzle has rear-facing holes that pull the hose down the pipe and scour the walls as you draw it back. Some also have a forward jet to cut into the clog.

Getting those pieces right is most of the job. General Pipe Cleaners' JM-2900 manual lists hose size by line size:

The same manual says the nozzle has to match the pump. A 3000 psi pump requires a different nozzle orifice than a 1500 psi pump, and a mismatch causes either too little pressure to clear the drain or too much pressure, which may damage the machine. It also notes pressure drops along the hose: at 4 gallons per minute, a 3/8-inch hose loses 90 pounds of pressure over 100 feet, and the gauge reads pump pressure, not pressure at the nozzle.

A pressure washer kit skips most of this matching. You get whatever hose and nozzle came in the box, on whatever pump you own. That's one reason a kit may stall at a bend or leave grease behind. Our page on hydro jetting nozzles explains what each head is built to do.

Because the water can go through skin. Both jetter manuals we checked warn about the same hazard first.

• Injection. General Pipe Cleaners warns that the equipment can produce a high pressure stream that can pierce skin and its underlying tissues, leading to serious injury and possible amputation or death. RIDGID's KJ-1750 manual says high pressure water can inject under skin, resulting in serious injury including amputation.
• A whipping hose. RIDGID says never to operate the jetter with the hose end outside of the drain, because the hose can whip and the spray can penetrate skin. It also says nozzles should not be removed from the drain while pressurized, and to mark the hose 24 inches from the nozzle so you know where the nozzle is.
• What's in the pipe. RIDGID warns that drains may contain chemicals, bacteria and other substances that may be toxic or infectious, and calls for eye protection and gloves at a minimum. It adds that safety glasses do not provide full protection, so wear goggles or a face shield.
• Engine exhaust. The JM-2900 is a gas-engine machine, and its manual says it is designed for outdoor use only. A gas pressure washer belongs outside too, which means running hose to an outdoor cleanout, not into a bathroom.

RIDGID is blunt about who should run one. Its manual says the jetter shall not be used by children or untrained personnel, and that the machine can cause serious injury in the hands of untrained users.

### What does an injection injury look like?

Often like nothing at first, which is what makes it dangerous. A review in the Journal of Clinical Medicine describes high-pressure injection injury of the hand as a trauma that appears to be minor with negligible signs and symptoms within the first hours, but in reality produces significant tissue destruction. The authors note these injuries can occur at pressures often exceeding 100 psi, far below the 1,500 and 3,000 psi pumps the JM-2900 manual discusses.

Water is on the milder end. The same review says the least severe consequences come from water or air injections, compared with paint or grease. Milder doesn't mean minor. A 2025 case report in Cureus describes a 25-year-old who was cleaning a drainage pipe with a high-pressure power washer and injured his thumb and index finger. He needed emergency surgery to relieve pressure in the fingers. He recovered fully, and the authors credit prompt recognition and early surgery.

General Pipe Cleaners' instruction is the one to remember: if fluid seems to have penetrated the skin, seek emergency medical attention at once. Don't wait to see if it swells.

When the pipe is old, the access is wrong, or the clog isn't the real problem.

Old cast iron or clay. A jet strong enough to cut roots or scale can also find the weak spots in a corroded or cracked line. Read whether hydro jetting can damage old cast iron or clay pipe before you aim anything at an older sewer.

No outdoor cleanout. The safe entry point is a cleanout, not a sink or toilet. If you can't find one, jetting without an accessible cleanout covers the options, and most of them aren't DIY.

Roots. The City of Phoenix explains that roots probe a sewer line for any opening, such as a crack or a poorly sealed joint, then form a ball and block it. Its advice when trees grow near the line and flow slows: have a plumber check the line and clear the blockage if necessary. Our page on whether jetting keeps roots from coming back covers what jetting can and cannot do about roots.

A sink or tub clog. For a clog near the trap of a sink or tub, a hand auger is the usual first tool. If you're choosing a tool, see the difference between a toilet auger and a drain snake.

Follow the machine's manual, and keep these rules from the jetter makers:

1. 1Wear goggles or a face shield and rubber gloves, plus closed, non-slip shoes.
2. 2Feed the hose 2 to 3 feet into the drain before turning the machine on, as the JM-2900 manual directs.
3. 3Grip the hose with both hands before starting. General Pipe Cleaners warns a loose hose or wand can whip.
4. 4Never pull the nozzle out of the pipe while it's pressurized. Shut the machine off first.
5. 5Work from the downstream side when you can. The JM-2900 manual says that lets debris flow away easily.
6. 6Keep kids, pets and bystanders away from the opening.

### Who is responsible for the sewer line in Phoenix?

You are, from the house to the city main. The City of Phoenix says home or property owners are responsible for cleaning and maintaining the sewer line that runs from the house to the connection with the city sewer main in the street or alley. So a clog in your yard line is yours to clear, by whatever method you choose.

If a line keeps clogging, a camera inspection after jetting shows whether it's grease, roots or a broken pipe. HQ jets and camera-inspects sewer lines across the Valley. See our hydro jetting service when you'd rather not put a pressure washer down the sewer.