Output pressure on my 2 year old 3300psi/2.8 gpm unit is low. Pulled the pressure relief valve (no rust or lime). I called Ridgid Tech Dept, and a rather helpful woman suggested that I do the following:
- make sure the switch is "OFF",
- attach a 3-4 foot length of garden hose to the water inlet
- pour in a few ounces of LimeAway
- Pull the cord a coupla times, (yes, the switch was "OFF"
- Wait 3-4 hours to loosen lime deposits.