Manufacturing and Developing Bushfire Sprinklers since 2014
Drencher Head Maintenance
A sort run through the regular maintenance that we recommend.
If you have purchased your Drencher before January 2026 - We have had reports of an issue with the nozzle in the end of the arm coming loose and the second is a squeaking noise from the spinning assembly. At the bottom of this page, we have listed the maintenance required to address both issues.
If you have purchased your Drencher after January 2026 then both these issues have been addressed.
Assembling a Drencher Head
Attach the Arms to Head
Attach the Arms to Head
Attach the Arms to Head
Hand tighten both arms into the Tee.
Note the location of the small port, the arm can be set within +- 15° to horizontal depending on your needs, then tighten the lock nut. Complete the same process on the second arm.
Head complete
Attach the Arms to Head
Attach the Arms to Head
The Head is designed to rotate clockwise, if it spins anti clockwise the head may undo from the spindle. The arms may be adjusted to throw water outward (standard), straight, or inward. if required just undo the locknut to adjust this feature, don't forget to lock up the nut.
Install
Attach the Arms to Head
Install
We have reduced the orifice in the spindle to restrict the flow of water and thus the heads rotation speed, a ring main with a line pressure between 100 & 200 KPa will ensure all heads are operating as designed. We recommend installing heads every 6 Metres at a 45 degree angle to level ground. We generally run the tube along the last set of roof screws on metal roofing.
Assembling a Flow restricted Drencher Head
Attach the Arms to Head
Attach the Arms to Head
Attach the Arms to Head
Hand tighten both arms into the Tee.
Note the location of the small port, the arm can be set within +- 15° to horizontal depending on your needs, then tighten the lock nut. Complete the same process on the second arm.
Head complete
Attach the Arms to Head
Attach the Arms to Head
The Head is designed to rotate clockwise, if it spins anti clockwise the head may undo from the spindle. The arms may be adjusted to throw water outward (standard), straight, or inward. if required just undo the locknut to adjust this feature, don't forget to lock up the nut.
Slow Water Flow
Attach the Arms to Head
Adjust Water Flow - Step 2
We adjust all flow control heads to half a turn open, approximately 4LPM before sending.
To Slow the Rotation Speed.
Then use a 13mm open ended Spanner and 4mm Allen Key release tension on the grub screw. Tighten grub screw clockwise 1/8 of a turn, re lock the grub screw and check the speed.
Adjust Water Flow - Step 2
Adjust Water Flow - Step 2
Adjust Water Flow - Step 2
To Increase the Rotation Speed.
Then use a 13mm open ended Spanner and 4mm Allen Key release tension on the grub screw. Loosen grub screw anti-clockwise 1/8 of a turn, re lock the grub screw and check the speed.
Install
Adjust Water Flow - Step 2
Install
The flow control head has a larger orifice through the spindle allowing more flow, at full flow pressure loss will determine the speed. We recommend installing heads every 6 Metres at a 45 degree angle to level ground. We generally run the tube along the last set of roof screws on metal roofing.
Issue - Arm Nozzles come loose
The Nozzles were not correctly tightened on assembly.
We are committed ensuring our products perform, unfortunately mistakes happen and one of our team missed the step of tensioning up the arm nozzles.
We ask that you check your drencher and tension the nozzle if required.
If the nozzle has undone and fallen out then please contact us so we can organise sending a replacement.
Instructions on Tensioning.
Holding the arm in your hand, use a small spanner (3/8) or a small shifter to tension the nozzle clockwise.
It doesn’t need to be super tight!
Issue - Squeaking and irratic rotation
Spinning Assembly Friction
During our development of the Drencher Head our research determined that the contact point between the spindle and housing would not require a seal as the water would provide lubrication and cooling.
Unfortunately we have been made aware that with different conditions and water quality the water is not enough.
So we have added a teflon (PTFE) washer to the assembly to both seal and remove the friction.
If you received your drencher after Australia Day 2026 then the washer will be installed.
We will contact all affected customers by mid February 2026, if you have not been contacted by then please make contact with us on 0466116266.
Please follow the instruction below to install the washer.
Parts and Tools
You will need to remove the head from its mount using a shifter.
Once separated from the mount, to install the washer you will need a flat bladed screw driver.
Dismantle the Spinning Assembly
Unscrew the spindle from the Tee Head by turning it anti-clockwise using a flat bladed screw driver.
Slip the Washer onto the Spindle
Carefully slip the washer onto the spindle and slide it down until it reaches the flat face. DO NOT FORCE THE WASHER AS IT MADE FROM TEFLON, IF NEEDED USE A LUBRICANT LIKE WD40 OR OLIVE OIL.
Once fitted then screw the assembly back together and refit to the mounting point.