One month as new owner of 40-year-old wash. 7 bays, 20-year-old Mark VII equipment. Quite a learning curve. I have 2 bays next to each other which seem the have the same problem. Low pressure for the wand. Reading about 900psi on gauge. Feels very weak compared to the other bays. I noticed yesterday, while operating in high pressure soap or rinse, that the foam gun was also dispensing at a low flow. This is happening on both bays 1 and 2. Any help as what to look for would be most appreciated.
New owner need your help
- Thread starter Tbone777
- Start date
Twodose
Active member
That is not a check valve, it is a pressure regulator or unloader, there looks to be a check valve under that, with the green hose attached to it, and another on the line that is after the red, yellow, clear LP lines < the chrome fitting.
MEP001
Well-known member
This is probably your weep check valve.
The quickest way to check it is to remove the tubing from the fitting and run the pump. There are most likely more at the boom that can go bad and cause this problem, you would check them the same way.
The quickest way to check it is to remove the tubing from the fitting and run the pump. There are most likely more at the boom that can go bad and cause this problem, you would check them the same way.
