Cepex Ball Check Valves

The industrial series ball check valves are designed for reliable performance and easy maintenance. The double union body allows quick disassembly for service, while the venturi-style oversized body in the 4" valve ensures maximum flow with a standard 3" FNPT connection. Although the valve has 3" end connections, the internal passage is expanded to the equivalent of a 4" bore, reducing pressure loss and boosting flow capacity. These valves are fully rebuildable, resistant to many chemicals, and include a foot valve screen end connector for versatile use in industrial and fluid-handling systems.

Rugged PVC construction for durability
O-rings available in EPDM or FKM for chemical compatibility
20370 & 20437 have Venturi-style body: 3" FNPT, but oversized 4" flow capacity
1/2" to 2" include socket/threaded ends; 2-1/2" to 4" are socket or threaded
Double union design for easy installation & service
Foot valve screen end connector included
Fully rebuildable design
Excellent resistance to many inorganic chemicals
Max. working temperature: 140°F
Minimum return pressure: 3 psi

Item #	Description	Catalog Pg.	Price	Add to Cart
Item 20335	1/2" Threaded/Socket Gray PVC True Union Check Valve with EPDM O-Ring 23.67/Each In Stock Save 5% when you buy 2+ Save 10% when you buy 4+ Save 15% when you buy 12+	P-559	23.67/Each In Stock
Item 20336	3/4" Threaded/Socket Gray PVC True Union Check Valve with EPDM O-Ring 28.47/Each In Stock Save 5% when you buy 2+ Save 10% when you buy 4+ Save 15% when you buy 12+	P-559	28.47/Each In Stock
Item 20338	1" Threaded/Socket Gray PVC True Union Check Valve with EPDM O-Ring 39.71/Each Out of Stock (Extended)	P-559	39.71/Each Out of Stock (Extended)	Not Available
Item 20339	1-1/4" Threaded/Socket Gray PVC True Union Check Valve with EPDM O-Ring 55.07/Each In Stock Save 5% when you buy 2+ Save 10% when you buy 4+ Save 15% when you buy 12+	P-559	55.07/Each In Stock
Item 20340	1-1/2" Threaded/Socket Gray PVC True Union Check Valve with EPDM O-Ring 57.93/Each In Stock Save 5% when you buy 2+ Save 10% when you buy 4+ Save 15% when you buy 12+	P-559	57.93/Each In Stock
Item 20341	2" Threaded/Socket Gray PVC True Union Check Valve with EPDM O-Ring 81.64/Each In Stock Save 5% when you buy 2+ Save 10% when you buy 4+ Save 15% when you buy 12+	P-559	81.64/Each In Stock
Item 20352	2-1/2" Socket Gray PVC True Union Check Valve with EPDM O-Ring 189.83/Each In Stock Save 5% when you buy 2+ Save 10% when you buy 4+ Save 15% when you buy 12+	P-559	189.83/Each In Stock
Item 20360	3" Socket Gray PVC True Union Check Valve with EPDM O-Ring 215.95/Each Special Order Save 5% when you buy 2+ Save 10% when you buy 4+ Save 15% when you buy 12+	P-559	215.95/Each Special Order
Item 20370	4" Socket Gray PVC True Union Check Valve with EPDM O-Ring (3" FNPT; 4" Flow) 347.27/Each In Stock Save 5% when you buy 2+ Save 10% when you buy 4+ Save 15% when you buy 12+	P-559	347.27/Each In Stock
Item 20380	1/2" Threaded/Socket Gray PVC True Union Check Valve with FKM O-Ring 32.24/Each Out of Stock (On Order) Save 5% when you buy 2+ Save 10% when you buy 4+ Save 15% when you buy 12+	P-559	32.24/Each Out of Stock (On Order)
Item 20390	3/4" Threaded/Socket Gray PVC True Union Check Valve with FKM O-Ring 38.58/Each In Stock Save 5% when you buy 2+ Save 10% when you buy 4+ Save 15% when you buy 12+	P-559	38.58/Each In Stock
Item 20400	1" Threaded/Socket Gray PVC True Union Check Valve with FKM O-Ring 44.88/Each In Stock Save 5% when you buy 2+ Save 10% when you buy 4+ Save 15% when you buy 12+	P-559	44.88/Each In Stock
Item 20420	1-1/4" Threaded/Socket Gray PVC True Union Check Valve with FKM O-Ring 68.32/Each In Stock Save 5% when you buy 2+ Save 10% when you buy 4+ Save 15% when you buy 12+	P-559	68.32/Each In Stock
Item 20430	1-1/2" Threaded/Socket Gray PVC True Union Check Valve with FKM O-Ring 78.87/Each Special Order Save 5% when you buy 2+ Save 10% when you buy 4+ Save 15% when you buy 12+	P-559	78.87/Each Special Order
Item 20431	2" Threaded/Socket Gray PVC True Union Check Valve with FKM O-Ring 115.75/Each Special Order Save 5% when you buy 2+ Save 10% when you buy 4+ Save 15% when you buy 12+	P-559	115.75/Each Special Order
Item 20435	2-1/2" Socket Gray PVC True Union Check Valve with FKM O-Ring 253.52/Each Drop Ship Save 5% when you buy 2+ Save 10% when you buy 4+ Save 15% when you buy 12+	P-559	253.52/Each Drop Ship
Item 20436	3" Socket Gray PVC True Union Check Valve with FKM O-Ring 267.98/Each Drop Ship Save 5% when you buy 2+ Save 10% when you buy 4+ Save 15% when you buy 12+	P-559	267.98/Each Drop Ship
Item 20437	4" Socket Gray PVC True Union Check Valve with FKM O-Ring (3" FNPT; 4" Flow) 411.03/Each Drop Ship Save 5% when you buy 2+ Save 10% when you buy 4+ Save 15% when you buy 12+	P-559	411.03/Each Drop Ship

Note: Product testing for individual applications is recommended before use. U.S. Plastic Corp. cannot be held liable for individual application failures.