If you are looking to replace with the identical pump you need to observe the position of the hole in the arm

Inlet / Bypass: 1/4 FPT

10 micron filtration

Use with Hot or Cold water (no steam)

PA VB200/280 Unloader Valve 53gpm 4500psi quick-connect-nozzles If you are looking toPA VB200 280 high volume unloader valve. Maximum Rated Pressure: 4500psi 53gpm rated flow 1" female Inlet Outlet Bypass 90C 195F max temperature Type: trapped pressure MPN: 60. 4300. 00 **Caution** Unloader valves are one of the most important safety devices on a pressure washer system. Failure to install and set the unloader properly could result in a very dangerous situation causing severe damage to the pump and possibly the operator. Professional