When your water jetter isn’t performing, every minute on site costs you. Many common problems have simple causes you can check in a few minutes. Others point to worn parts that need attention from a qualified repairer.
This guide, based on the troubleshooting section of the Enviroline Sewerjett operator’s manual, covers the most common jetter faults and where to start.
Important: Never attempt mechanical repairs yourself, and never adjust the unloader or safety valve. Tampering can cause dangerous pressure build-up and will void your warranty. If in doubt, stop the machine and contact Enviroline.
Engine turns over but won’t run
Check the simple things first:
- Is the emergency stop engaged?
- Is the water tank full? A low-water shut-off protects the pump.
- Is there enough fuel?
- Is the engine oil level correct?
- Does the choke need to be pulled out?
Engine runs, then stops after a few seconds
Check the fuel tank breather valve on the fuel cap. If it’s closed, release it.
Engine is sluggish to start
This is usually a flat battery. Check the voltage, and recharge or replace if needed. Also check the ball valves are open. EFI engines need water flowing to start properly.
Pump runs, but there’s no water output
- Iced-up hoses or fittings in cold weather: pour warm water over them or leave the machine in direct sunlight.
- A faulty unloader valve seat.
- The pump sucking air from the water supply.
Pump runs, but pressure is low
- Check the water supply and look for air getting into the suction line.
- Valves sticking or dirt in the valves.
- Incorrectly sized nozzle.
- Worn unloader valve seat or piston packing.
Pressure drops after a period of normal use
The most common cause is a worn nozzle. Nozzles are wear items and lose performance over time. Worn or blocked suction and delivery valves, or worn piston packing, can also be to blame.
Fluctuating pressure
Usually caused by worn or blocked valves, the pump sucking air at joints in the suction line, or worn piston packing.
Noisy pump
Check for air in the suction line, foreign matter in the valves, a broken or weak valve spring, or worn bearings.
Milky or watery pump oil
If your pump oil looks milky, change it immediately. Water in the oil can come from a worn oil seal, worn piston packing, high humidity, rain, or a water tank overflow caused by a faulty float valve. In humid conditions, change the oil twice as often.
Water or oil dripping from under the pump
Water dripping usually points to worn piston packing or a worn plunger retainer. Oil dripping usually means a worn oil seal.
Don’t keep running a faulty machine
Running a jetter after a fault has been noticed can turn a small repair into a major one. It also isn’t covered by warranty. Tag the machine out of service and have it checked by an approved Sewerjett repairer.
Need help with your jetter?
Enviroline’s team can help diagnose faults, supply genuine Sewerjett parts and arrange servicing. Contact us or browse our pipe maintenance range for replacement nozzles and hose.