450 (4"-10") Parts/Repair Kits

Parts Indentification

1. Cover Plate

2. O-Ring, Cover Plate

3. Bolt, Cover Plate

4. Seat Retainer #1

5. Seat Retainer #2

6. O-Ring, Seat

7. Bolt, Poppet Retainer

8. Handle, #1 Poppet Assembly

9. Washer, Poppet Retainer

10. O-Ring, Poppet Retainer

11. Poppet Retainer

12. Seal Ring

13.Seat Assembly #1 Poppet

14. Seat Assembly #2 Poppet

15. Washer, Seat

16. Gate Valve, NRS (GxG), NRS (GxF), OS&Y (GxG), OS&Y (GxF), Butterfly Valve (GxG), Butterfly Valve (GxF)

17. Ball Valve, FxF

18. Cover Retainer Assembly

19. Grooved Coupling

20. Cover

21. Bulkhead Fitting

22. Sensing Line Bulkhead Fitting

450 (4"-10") Parts/Repair Kits

450

Double Check - Backflow Preventers - 4" to 10"

Where to Buy

Product Number	Description	Shop Parts
RK4-350CK2	#2 Check Assembly Repair Kit, 4" 450	Where to Buy Buy Online
BRK4-LBF-SEAT1RTNR	Bulk #1 Seat Retainer Repair Kit, 4" 450	Where to Buy Buy Online
RK4-350-SEAT2-ASSY	#2 Check Assembly Repair Kit, 4" 450	Where to Buy
RK4-350	Standard Repair Kit, 4" 450	Where to Buy
BRK4-LBF-SEAT2RTNR	Bulk #2 Seat Retainer Repair Kit, 4" 450	Where to Buy Buy Online
RK4-350CK1	#1 Check Assembly Repair Kit, 4" 450	Where to Buy Buy Online

Diagram #	Product Number	Description	Shop Parts
	RK212-450-COVERPLATE	Cover Plate Repair Kit, 4" and 6" 450	Where to Buy

Product Number	Description	Shop Parts
RK6-350-SEAT2-ASSY	#2 Check Assembly Repair Kit, 6" 450	Where to Buy
BRK6-LBF-SEAT1RTNR	Bulk #1 Seat Retainer Repair Kit, 6" 450	Where to Buy Buy Online
RK6-350CK1	#1 Check Assembly Repair Kit, 6" 450	Where to Buy Buy Online
BRK6-LBF-SEAT2RTNR	Bulk #2 Seat Retainer Repair Kit, 6" 450	Where to Buy Buy Online
RK6-350CK2	#2 Check Assembly Repair Kit, 6" 450	Where to Buy Buy Online

Product Number	Description	Shop Parts
RK8-350-COVERPLATE	Cover Plate Repair Kit, 8" and 10" 450	Where to Buy
RK8-350	Standard Repair Kit, 8" and 10" 450	Where to Buy
RK8-350-SEAT1-ASSY	#2 Check Assembly Repair Kit, 8" and 10" 450	Where to Buy
RK8-350CK2	#2 Check Assembly Repair Kit, 8" and 10" 450	Where to Buy Buy Online
RK8-350CK1	#1 Check Assembly Repair Kit, 8" and 10" 450	Where to Buy Buy Online

The manufacturers and products listed are or may be the trademarks of their respective companies. The other manufacturers and products listed are not associated with Zurn Elkay or Zurn Elkay’s products. Zurn Elkay provides this information for general cross reference purposes only. Zurn Elkay makes no representations regarding the quality, comparability, or compatibility of any competitor products listed. All information is subject to change without notice.