Meanwhile, if you have O-ring sprinklers, make sure to submit your claim by Aug. 31. Information can be found on Central Sprinkler's special Web site set up to handle recall issues.

That O-ring seals against the flat, machined face in the corresponding female fitting. O-Ring Boss (ORB) fittings are the “standard” hydraulic fittings we grew up with, where a threaded male ...

This rule was never actually tested or proven, but simply considered conventional wisdom and, therefore, heavily relied on by engineers when designing and selecting O-ring seals. But today ...

The extra degree of freedom lets thickness vary to better fit the groove. O-ring seals generally focus the seal force onto a thin sealing line, whereas square-cut seals provide a much wider ...