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White PVC inline swing check valve with dual compression ends

Dayton

Dayton 4RG89 2" PVC Compression Swing Check Valve Trap

SKU CH-G6FF-5Y134 MPN 4RG89

Prevents backflow in 2-inch PVC lines using a compression swing-check design

  • TypeDrain Components
  • Inline swing design allows smooth flow
  • PVC body resists corrosion in drainage systems
  • Compression fittings create secure joints without tools
  • Vertical mounting suits standard drain layouts
  • General-purpose valve fits residential and light commercial use

Purpose and fit

The Dayton 4RG89 is a 2 inch PVC inline swing check valve built for general-purpose drainage systems. It uses compression connections on both ends so installers can join it without solvent cement or special tools. The vertical mounting orientation suits typical stack or branch layouts where backflow prevention is required. It is not intended for steam service or for horizontal runs that demand a different valve geometry.

Thermals, noise and power

As a passive mechanical valve the unit generates no heat and draws no electrical power during normal operation. The swing mechanism opens and closes under gravity and flow pressure alone, producing only the sound of moving water within the pipe. There are no motors, solenoids or electronic components that could add audible noise or thermal load to the installation.

Sustained-load behaviour

Under continuous flow the PVC body and inline swing design maintain a consistent seal against reverse pressure without degradation from cycling. The compression joints remain secure because they are not subject to thermal expansion cycles or vibration from powered equipment. The valve is not rated for steam pressure, so sustained high-temperature service would exceed its design limits and is not supported.

Highlights

  • Inline swing design allows smooth flow
  • PVC body resists corrosion in drainage systems
  • Compression fittings create secure joints without tools
  • Vertical mounting suits standard drain layouts
  • General-purpose valve fits residential and light commercial use

Specifications

TypeDrain Components
BrandDayton
Model4RG89

Questions about this item

How do I install the 2-inch compression swing check valve without leaks?

Cut the PVC pipe square, deburr the ends, slide the compression nuts and ferrules onto each pipe, then push the valve fully into both nuts before tightening by hand plus one-half turn with a wrench; the step most people miss is fully seating the pipe against the internal stop before tightening.

What maintenance or replacement will the 4RG89 swing check valve need over time?

The internal flapper and its hinge pin are the only moving parts; inspect annually for debris or mineral build-up that prevents full closure, and replace the flapper assembly if the seat shows wear or the valve no longer seals against backflow.

What is the first limit that appears when the valve runs continuously in a vertical drain line?

The body is PVC and carries no steam-pressure rating, so sustained high-temperature discharge will soften the material before any mechanical wear limit is reached.

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