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Bronze union kit with two EPDM gaskets for 3/4 inch FNPT

Armstrong Pumps

Armstrong Pumps LF 3/4" FNPT Union Hardware Kit 150 psi

SKU CH-9RCY-0JMDV

A bronze union kit with EPDM gaskets for 3/4-inch FNPT connections on Armstrong Astro 220SSU and 225SSU circulating pumps, rated to 150 psi for potable water systems

  • Potable-water safe with EPDM gaskets for clean supply
  • Bronze union body rated to 150 psi for durability
  • Direct fit for Armstrong Astro 220SSU and 225SSU pumps
  • Kit includes two complete unions with gaskets ready to install
  • Lead-free construction meets drinking-water requirements

Union Kit for In-Line Circulating Pumps

This Armstrong LF union hardware kit fits 3/4 inch FNPT connections on ASTRO 220SSU and ASTRO 225SSU in-line circulating pumps. It provides the necessary components to join pipework securely in potable water systems. The kit is rated for 150 psi working pressure and uses lead-free bronze construction.

Included Gaskets and Bronze Unions

Each package contains two bronze union assemblies and two EPDM gaskets, so both the suction and discharge sides can be sealed in one purchase. The gaskets are compatible with potable water and eliminate the need to source separate sealing hardware. Having both unions supplied together ensures matched dimensions and simplifies installation.

Pressure and Compatibility Limits

The 150 psi rating defines the maximum pressure these unions can safely contain in the circuit. They are designed specifically for the listed Armstrong ASTRO models and 3/4 inch FNPT piping; other pump brands, larger pipe sizes or higher-pressure systems fall outside the verified scope. No additional adapters or sealing compounds are included for configurations beyond these parameters.

Highlights

  • Potable-water safe with EPDM gaskets for clean supply
  • Bronze union body rated to 150 psi for durability
  • Direct fit for Armstrong Astro 220SSU and 225SSU pumps
  • Kit includes two complete unions with gaskets ready to install
  • Lead-free construction meets drinking-water requirements

Specifications

BrandARMSTRONG

Questions about this item

Will the EPDM gaskets in this kit need periodic replacement?

EPDM gaskets resist hot potable water but should be inspected during routine pump maintenance and replaced if they show hardening or leakage.

What pressure limit applies to the bronze union bodies?

The bronze unions are rated for 150 psi, so sustained system pressure must stay at or below that value.

How much heat do the bronze unions add when the circulator runs continuously?

Bronze unions conduct heat from the pumped fluid but add no heat of their own; the motor and fluid temperature determine the surface warmth.

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