Complete air-intake check valve assembly for any CSI Reactr or Hydroxr manifold.

• New design improves functionality and simplifies maintenance
• 1/8" threaded connection simply screws into any Reactr or Hydroxr manifold
• Direct replacement for the old check valve p/n 65555X215
• Can replace chemical injection check valve 66555X102 on older Oxyclean systems

This check valve can be rebuilt & reused simply by replacing the internal duck bill, p/n 20009X022