Pentair Sta-Rite System 2 Spring Check Valve (27001-0130S) furnas and this Maytronics Dolphin version

and this Maytronics Dolphin version is rated for 115 volt use with the 1869596 reference

Suitable for service repairs

A clear sight glass lets operators see when discharged water begins to run clean

Useful when replacing a failed or outdated original control panel

and this generic version is sized with a 7-7/8 inch inside diameter and 8-3/16 inch outside diameter using the O-215 reference

Pentair Sta-Rite System 2 Spring Check Valve (27001-0130S) furnas and this Maytronics Dolphin versionThis replacement part supports a cleaner, more dependable service outcome when the existing component is worn, missing or difficult to reuse. This component supports reliable repair work and helps keep the pool system operating as intended. Because pool systems rely on tight fits and predictable water movement, using the right replacement helps protect surrounding parts from strain. This item is a practical choice for planned maintenance, leak