Hypro pressure regulator is used on most brands of truckmounts and many pressure washers including Scouts, Hydramaster, ChemTex Panther (older), Amtex, Prowlers, Prochem, Hornets, and many others Dual 3/8" Female pipe thread. Water flow is comes in from the side port and bypasses out the bottom port. This is a widely used part in the industry and is easily rebuildable. Water flow is in from the side and out the bottom port. Can be adjusted from 100 psi to 2000 psi. To learn more about fixing these, please visit Repair page Compare to current or past OEM association: HYP33000084 734943042468 PHY169-101 000-169-101 3300-0084 Used on: Hydramaster: Spitfire 3.2, Spitfire 4.0, Crossfire 3.7, Crossfire 4.2, Crossfire 4.4, Profire 3.7, Profire 4.7, Bobcat 3.5, Aquacat 3.5/3.9, Hydracat 3.5, Hydracat 4.0, Hydracat 4.5, CDS 4.2, CDS 4.5, CDS 4.6, CDS 4.7 & CDS 4.8 Bridgepoint: Dagger Chemtex truckmounts US Product Cobra Amtex Truckmounts Clean Storm Truckmounts EZ truckmounts