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There is no presoak, but there is tire cleaner. So there is a splitter or something at the boom, and check valve between the high pressure pump and the tire cleaner since it's low pressure? If that was bad, would the pressure blow back into the tire cleaner? Since that is low pressure hose...

2Biz, Yes i am, why ordered one. Thank you for the confirmation. Was talking about when initially starting to diagnose what could be the cause, not today as I have one on order and being shipped in. Oh and by the way, Checked out your Facebook page earlier and enjoyed the behind the...

Perfect. I was leaning regulator but wasn't sure. Have one ordered. Yeah only had wash for 3 weeks and trying to fix all the things. I thought a 4008 nozzle was huge based on what everyone is saying. With the 1505 tips, what PSI you running?

Don't have a spare regulator. With the bay gun trigger pulled, i set the pressure to 1000 and when trigger released it goes to 1300+. So the pump can make pressure when bay in use. I just wouldn't think that regulator should fluctuate that much when in use or not. Other bays don't vary...

MEP, you mentioned backing regulator off all but a couple threads, but that makes pressures really low. I did that. But wasn't sure if that would be for and unloader vs regulator.

Yes, swapped tips between 2 bays and same pressure issues. I've order 2506 tips but don't have yet. Currently has 4008 tips.

There are no check valves at boom and we don't have spot free rinse. I think Randy has a great idea with swapping the hoses to the bay and I will try that next and try to flush the regulators. Thanks

So still having the low pressure issue when in use. When the gun is not running the pressure is at 1000psi as expected (pressure regulator set to 1000). As soon as water flow starts, pressure goes to about 600psi. Swapped nozzles with another bay and the pressure loss is still there, so not...

Thanks for the response. I don't get a weep at other bays. What is that valve used for? to release pressure or something when servicing? If that isn't leaking, and likely not regulator, would pump seals be next steps? As for cranking it up, would going from 1000 to 1200 psi be considered...

I just purchased a 4 bay SS. Its my first one and trying to do my own service on equipment to know how everything operates. 3 of the bays run at 1000PSI (plan to increase) but have one that is at about 500. Was thinking first order would be a pump seal replacement, but is there something else...