Skip to content
Front view of FEBCO check module 905-347 replacement kit for 1/2–3/4" 850/860/880 assemblies.

FEBCO Check Module 905-347 — 1/2–3/4" for 850/860/880

Brand: Febco
Save 25%
$89.82
$67.36
SKU 905-347

Notify me when back in stock

The FEBCO 905-347 Check Module is an OEM replacement check assembly designed for use in FEBCO 850, 860 and 880 series backflow preventers. Intended for 1/2"–3/4" sizes (3/4"), this module restores internal sealing and poppet function to reduce downtime during maintenance.

  • Direct fit for FEBCO 850 (first or second check) and 860/880 (second check) assemblies.
  • Kit includes: seat, O-ring(s), poppet, seal disc, disc retainer, round HD screw, spring, guide and a lubricant gel packet.
  • Made to OEM specifications with durable elastomers and precision metal components for consistent seating performance.
  • Ideal for field service and shop rebuilds—replaces worn check components without replacing the entire assembly.
  • Compatible with NPT end connections; fits 1/2"–3/4" sizes listed on Febco parts tables.
  • Sold per module for one check location; follow Febco installation and maintenance instructions after replacement.

Replacing the 905-347 check module is a cost-effective repair that restores proper operation and helps extend the life of your FEBCO backflow preventer. For part diagrams, installation steps, relief valve instructions and freeze-protection guidance, refer to the manufacturer documents included with this listing or the Febco parts manual.

Reviews

Frequently Asked Questions

What models is the 905-347 check module compatible with?
Compatible with FEBCO 850 (first or second check) and 860/880 (second check) for 1/2–3/4" sizes.
How do I install the 905-347 check module?
Install per Febco installation instructions: replace seals and poppet, reassemble cover, torque bolts and perform the required backflow tests.
What comes in the 905-347 kit?
Includes seat, O-ring(s), poppet, seal disc, disc retainer, round HD screw, spring, guide and a lubricant gel packet.