Archive for September 26th, 2018

Garden Hose Y-Valve Autopsy

One of the handles snapped off a Y valve at the garden and I finally got around to an autopsy:

Garden Y Valve - cross sectioned

Garden Y Valve – cross sectioned

That’s using a 24 tpi bandsaw blade, which doesn’t cut nearly as smoothly as a fancy diamond saw, but seems good enough for the purpose. Most of the ripply shading on the cut plane comes from specular reflections; it’s pot metal all the way through and cuts to a high shine.

A closeup shows more detail around the (now hemispheric) ball valve:

Garden Y Valve - thread detail

Garden Y Valve – thread detail

You can see faint straight lines just inside the hose threads, which gives a hint of what’s to come.

Pry out the sectioned ball and dislodge the O-ring from the now-obvious insert:

Garden Y Valve - O-rings

Garden Y Valve – O-rings

Gently squish the threads in the bench vise to pop out the insert:

Garden Y Valve - plug removed

Garden Y Valve – plug removed

If lives depended on it, one could dismantle and repair the valve without recourse to a bandsaw, but …

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