Water hammer arrestor

WATTS water hammer arrestors series 15M2
Pressure-Temperature : Operating pressure designed to operate on all domestic and commercial line
@150 psi ( 10.6 bar ) working pressure.
Temperature range : 33 F to 180 F ( 0.6 C to 82 C )
Materials
Bodies : Copper tubing
Piston : Polypropylene
Adapter : Brass
O-ring : EPDM
PDI listed ( PDI WH201 )