How to break down pressure relief valve from a water heater?

I have a bunch of these and they give me brass breakage because of the spring inside. How do you remove all the guts from these?

I cut them in half with my cut off blade and the insides fall right out.

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Originally Posted by freonjoe

I cut them in half with my cut off blade and the insides fall right out.

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Sawzall makes short work of them.

I make a slit across the pressed in aluminum top then pop it out.

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Originally Posted by Mick

Sawzall makes short work of them.

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No offence Mick but some of those springs inside are spring steel (hardend) and will kill a sawzall blade in a newyork second. The same goes for the brass valves on propane tanks.