Agreed, it looks like a check valve spring, maybe a plug that holds the assembly in place (?), Archived Message Posted by IlliniOllie on May 16, 2025, 12:01:31, in reply to "looks like a check valve assembly" and a valve spring retainer. My guess is, the whole pump head would have to be taken apart to put it back in place, but it shouldn't have fallen out in the first place unless it was broken. Previous Message Message Thread: I am nearing defeat on this effing pressure washer "rebuild." - longsnapper May 16, 2025, 11:41:42 Since I know you're all waiting on pins & needles, I figured it out... - longsnapper May 19, 2025, 15:35:03 After issues with my last electric pressure washer it recently found itself in a dumpster. - EffinIllini May 16, 2025, 12:00:11 looks like a check valve assembly - IlliniSax05 May 16, 2025, 11:55:45 Agreed, it looks like a check valve spring, maybe a plug that holds the assembly in place (?), - IlliniOllie May 16, 2025, 12:01:31 I was thinking it would go at the inlet to the high pressure hose - IlliniSax05 May 16, 2025, 12:09:53 That's what I think/thought, but there's nothing to house it. And it doesn't - longsnapper May 16, 2025, 12:32:46 If you can't get it working, buy a new one. They're great and like $100 at costco.* - Warrin'_Illini May 16, 2025, 11:44:06 I was actually planning on buying a new one anyway, so I could keep one on the roof - longsnapper May 16, 2025, 11:46:51 Re: I was actually planning on buying a new one anyway, so I could keep one on the roof - deadpoolOG10 May 16, 2025, 12:41:42   Searching