Sioux Chief - 660-X2B - Mini-Rester Water Hammer Arrester 1/2" PEX Crimp Straight Circle defogger These feature a purple seal

These feature a purple seal with the international "Do Not Drink" symbol

Shut-off Head 37 ft Max Flow ~62 GPM @ 5 ft head Fluid Temp (Cont

5000 Series Full-Circle Pattern Pop-up Rotor with PRS Pressure Regulation and SAM Check Valve

a clogged check valve is the most likely culprit

Valve Type: Anti-Siphon

Sioux Chief - 660-X2B - Mini-Rester Water Hammer Arrester 1/2" PEX Crimp Straight Circle defogger These feature a purple sealMini Rester Water Hammer Arrester " PEX Crimp Straight Sioux Chief 660 Series piston type water hammer arresters shall be required in piping systems. Water hammer arresters shall have sufficient volume of air to dissipate the calculated kinetic energy generated in the piping system. Arresters shall be effective when installed at any angle. Arresters shall be approved for installation with no access panel required. Water hammer arresters shall be ANSI