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White PVC inline true union swing check valve with socket connections

Dayton

Dayton 4RG91 2" Compression PVC True Union Swing Check Valve

SKU CH-CKN1-5N3SC MPN 4RG91

A 2-inch PVC true-union swing check valve with socket connections for vertical installation in general-purpose waste-water lines

  • Product typeDrain Components
  • True union design enables easy in-line maintenance
  • Single swing-disc mechanism provides automatic back-flow prevention
  • PVC body resists corrosion in waste-water service
  • Socket-by-socket connections allow direct solvent-weld installation
  • Vertical mounting orientation ensures reliable gravity operation

2" True Union Swing Check Valve

The Dayton 4RG91 is a PVC inline true union check valve designed for vertical mounting in general-purpose waste water lines. Its socket-by-socket connections and single-swing mechanism allow flow in one direction while preventing backflow. The true union body enables removal for cleaning or replacement without cutting the surrounding pipe.

Suits vertical waste lines needing removable

Installers running horizontal pipe runs or requiring a spring-assisted closure should select a different valve style. Systems that demand a rated steam pressure limit are not served by this model. Applications needing a flanged or threaded connection will require alternative fittings.

Socket x socket connection for solvent weld

The valve joins directly to 2 inch PVC pipe using standard solvent cement on both ends. This connection method creates a permanent, leak-resistant joint suited to drainage and waste water systems. The true union nuts remain accessible for valve servicing after the socket joints have cured.

How it compares

Measured against everything we stock in Drain Stoppers, Strainers & Traps, at today’s prices. Recalculated every night.

Price $57.99
Pricier than about 66% of the 4,240 comparable items (median $31.99).

Specifications

Product
Brand nameDayton
Model name4RG91
Product typeDrain Components

Questions about this item

How does the 2-inch socket connection affect flow through the inline true-union body?

The 2-inch socket-by-socket connections match standard PVC pipe sizing, allowing full-bore flow through the inline true-union body without internal reduction.

What does the socket-by-socket connection type mean for installation on a vertical line?

The socket connections are solvent-welded to the pipe, creating a permanent joint that supports the valve in the required vertical mounting orientation.

What does the true-union body design require for mounting in a vertical pipe run?

The true-union body uses two union nuts that thread onto the valve ends, so the pipe must be able to slide axially to engage both sockets during assembly.

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