SMA Products TEEJET TIP STRAINER/CHECK VALVE – 50 MESH / 5 PSI CHECK POLY BODY – 878-4193BPP550SS Features: 4193A TeeJet Strainer and Check Valve Available in Brass, Stainless Steel or Poly Body Minimizes nozzle dripping; fits all TeeJet nozzles. Ball check opens at 5 PSI. Recommended for flow rates up to 0.8 GPM Series Available in Screen Mesh sizes of 24, 50, 100 and 200 mesh screens.