Want to Siamese 2 pressure washers together? The blue spring unloaders are the only ones we use for a consistent flow  if you have a 1/2” pump or higher gpm then buy these ZH288. If 8-10gpm buy the PA 3/8” listed. Many people try the other unloaders and always call us cause they aren’t working. Save yourself time and just get these. …… and you don’t need check valves. 

ZH288 Blue Spring Unloader 1/2" NPT YUB 

FEATURES:

• trapped pressure unloader

• Maximum volume: 21 GPM
• Maximum pressure: 4500 PSI
• Maximum temperature: 195F. The valve is designed for continuous use at a water temperature of 140F. It can operate for short periods at a maximum temperature of 195F.
• Inlet: Dual 1/2" FPT
• Discharge: 1/2" FPT
• Bypass: 1/2" FPT