Pete C. wrote:

(...)

Relief valve. Nothing more than a steel ball and a spring under a plug,
even the cheap jacks will have them.


Yup. My cheap 2T toe jack goes into bypass mode easily, when overloaded.
Once lowered and repositioned it works just fine once more.

It is 'just the ticket' for disassembling cinder block planters.

--Winston

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Congratulations Robert Piccinini and Steven A. Burd, WalMart Publicists of the Year!