Hain-Yo Check Valve Fits FC9AC010 and HK-40

Fits many hain yo models:

• HK-40 Older style JH01GJ now with larger o-ring coverage
• FC9AC010 - JH04BD
• reduces water hammer
• Hain-Yo Check Valve Fits JH01GJ - HK-40
• 70080Check REF.