Check out the diagram and instructions below for the correct installation of our 399 Series restrictors into a -3 or -4 Hose End.
Step 1: Disconnect your hose end from the adapter, select the correct size restrictor, -3 (399-03), -4 (399-04)
Step 2: Take the restrictor and insert into the hose end until it seats. Take care that it does not fall out.
Step 3: Connect the hose end back to the adapter and tighten as per normal. The hose is now ready to use with the 1mm restrictor.
