Pressure Washer Hose Fitting Kit | Gerni / Stihl / Nilfisk

This Gerni Adaptor Kit takes the guesswork out of upgrading your pressure washer hose with the exact fittings you need.

If you're wanting to get rid of the cheap plastic hose your machine uses, maybe you're tired of being stuck with an M21 threaded hose no one else uses or you just want to upgrade your high pressure hose to an Uberflex. You'll need some straightforward adaptors to get it going, so we've got a Gerni / Stihl / Nilfisk fitting kit that's already been researched for you so you can upgrade your setup quickly.

There are four different fitting kits to choose from. Check below to help compare what you're working with at home. Gerni, Stihl and Nilfisk commonly use M21 threads on some models and then their own quick connect fitting on other models.

If you've already got an existing upgraded short gun like the MTM SG35 and are now looking at upgrading your hose, you'll want the 3/8" Adaptor kit below to connect you up to your gun.

Compatibility:

• Tested and made for non integrated hose reel models such as:
  • Gerni 3300
  • Gerni 3600
  • Gerni 4000
  • Gerni 4100
  • Stihl RE110
  • Stihl RE125x
  • Stihl RE90
  • And plenty more
• Based on current Australian 25-26 models

Got a Karcher? See the Karcher K Series Hose Fitting Kit or the Karcher HD Hose Fitting Kit instead.

Features:

• High quality brass for durability: Well made brass adaptors to last through every detail.
• Turnkey Upgrade for M22 14mm Hoses: Converts the standard ends, whether M21 or Gerni connections, on Uberflex or aftermarket pressure hoses into a full convenient upgraded system.

Pressure Hose Adaptor Kits:

• M21 Standard Hose Fitting Kit
  • 1x M21 to M22 14mm Male Adaptor
  • 1x Male Gerni/Stihl Hose Adaptor (M22 14mm)
    • Connect each end to an M22 14mm female hose
• M21 Standard to 3/8" QC Female Fitting Kit
  • 1x M21 to M22 14mm Male Adaptor
  • 1x Female 3/8" QC to M22 14mm male adaptor
• Gerni Quick Connect Standard Fitting Kit
  • 1x Gerni Male Hose Adaptor (M22 14mm)
  • 1x Gerni Female Hose Adaptor (M22 14mm)
  • 1x M22 14mm Hose Joiner Adaptor (For Pressure Hose)
  • These fittings will not work with an integrated hose reel (Internally Plumbed)
• Gerni Quick Connect to 3/8" QC Female Fitting Kit
  • 1x Female 3/8" QC to M22 14mm male adaptor
  • 1x Gerni Female Hose Adaptor (M22 14mm)
  • 1x M22 14mm Hose Joiner Adaptor (For Pressure Hose)

Looking for a single adaptor instead? See the full range of pressure washer fittings and adaptors.

Directions:

1. M21 Standard
   1. Screw the M21 adaptor fitting onto your Gerni / Stihl pressure washer.
   2. Connect the brass male Gerni / Stihl adaptor to the other end of the hose.
   3. Thread the hose onto the M22 14mm thread of the M21 adaptor now on the machine.
   4. Connect the completed hose to your stock gun to test fitment. Run water through the machine before powering on to check for immediate leaks.
2. M21 to 3/8" QC Gun
   1. Screw the M21 adaptor fitting onto your Gerni / Stihl pressure washer.
   2. Connect the brass 3/8" Female QC adaptor to the other end of the hose.
   3. Connect the completed hose into your 3/8" short gun to test fitment, and do the same for the M21 thread. Run water through the machine before powering on to check for immediate leaks.
3. Gerni QC Standard
   1. Screw the female Gerni receiver into the hose joiner adaptor, then thread this to the pressure washer hose.
   2. Thread the male brass hose adaptor into the other end of the hose.
   3. Connect the completed hose to your pressure washer and stock gun to test fitment. Run water through the machine before powering on to check for immediate leaks.
4. Gerni QC to 3/8" QC Gun
   1. Screw the female Gerni receiver into the hose joiner adaptor, then thread this to the pressure washer hose.
   2. Connect the brass 3/8" Female QC adaptor to the other end of the hose.
   3. Connect the completed hose into your 3/8" short gun to test fitment, and do the same for the Gerni / Stihl pressure washer side. Run water through the machine before powering on to check for immediate leaks.

Should any leaks be present, use PTFE waterproofing tape to help create a better seal for the threads of the adaptors.