Tips for Protecting Your Jetting Equipment Against Frost

The UK is currently experiencing an extreme cold-snap and we can’t stress enough the importance of protecting your equipment against frost. This is particularly true of the high-pressure pump, as frost damage can lead to an expensive repair bill or the need to replace the pump or other parts of the jetter.

As a starting point, ensure you need to remove all the water from the jetter hose every time you finish a job. You should never attempt to run your equipment if you suspect it has frozen, and taking preventative steps is a lot less time consuming than waiting for your equipment to thaw.

Overnight storage is one of the main causes of freezing and many customers install a night heater in their vehicle for use during cold weather periods. A heater can also be useful when travelling between jobs in cold conditions as water in lines can freeze. If you don’t have a night-heater we would recommend storing your equipment in a heated garage or at very least try to cover the equipment with a blanket.


the antifreeze process

We recommend during cold weather that you either perform the antifreeze procedure at the end of the day when the unit is no longer going to be used or prior to any long journeys.

All Andy Guest equipment is fitted with an anti-freeze valve as standard and we recommend the following procedure should be followed. Many other equipment suppliers fit their units with an anti-freeze valve and the process will be similar, though it is worth consulting your operator’s manual before beginning the ant-freeze process.

  1. Drain water tank
  2. Turn anti-freeze valve to the open position (pointing towards the anti-freeze pipe)
  3. Turn the water tank flow valve to the closed
  4. Put anti-freeze hose into the anti-freeze drum
  5. Turn selector valve to pressure
  6. Start the engine and run until antifreeze comes out of the high-pressure hose (ensure no nozzles are attached)
  7. Turn selector valve to dump and turn the remote briefly onto pressure (remote only)
  8. Turn remote off and stop the engine

PLEASE NOTE: Do not run the equipment with the selector in dump position and remote off or all antifreeze will be dumped back into the tank


  1. Refill the water tank
  2. Turn anti-freeze valve and water tank flow valve back to the original operating position
  3. Put pressure hose into anti-freeze drum (ensure no nozzles are attached)
  4. Start the engine and run until water starts running clear or drum has been filled to the original level
  5. Obviously, the process will have a slight diluting effect so care must be taken and it is only designed to reduce the risk of freezing so normal safety checks should always be conducted.

Equipment in constant contact with water is particularly vulnerable to frost and while undertaking the steps needed to protect your machine requires additional time on a working day, it’s a worthwhile exercise to keep you operational even in the harshest weathers.