Plumbing component question.

[ROBERT YOUNG]

This PEX plumbing primer valve component is new to me.
Any help would be appreciated.
32891

[Jerry Peck]

Robert,

What I suspect that is for is a floor drain primer.

Some of those use fluctuations in pressure to briefly open a valve and allow water to flow to a floor drain trap to keep it promed.

Flush a toilet or turn on/off a faucet and the water pressure drops then spikes, which causes the valve to open briefly.

[Garry Sorrells]

Take a look: Precision Plumbing Products (http://www.pppinc.net/1/2/p_1_p_2_series_trap_primer_valve.html)

[ROBERT YOUNG]

Thanks. Much appreciated.

[Glenn Duxbury]

Yep - That's a trap-primer (see 'em all the time "up Here")