-6 Primary Check Valve
This brass check valve is intended to be used as a "main" and contain a drop-in style bypass pill. It is machined for an internal o-ring to seal against the pill and prevent leakage. Includes an anodized aluminum poppet, Stat-o-seal washer and a spring for 1-7 PSI. Other springs can be substituted on request (leave us a note in the comments section of your order).