Enlarging Check Valves

Engineered for reliability, these check valves provide precise, one-way flow control to protect sensitive equipment and ensure system integrity. By preventing backflow with a dependable seal, these valves are an essential component for any fluid or gas handling system where unidirectional flow is required. The check valves are offered in multiple housing and diaphragm materials to meet specific chemical compatibility and application needs. See the material spec sheet for more detailed information on each housing material.

Polypropylene, nylon, polycarbonate, gamma stable polycarbonate, or Kynar® PVDF housing
Viton™ FKM, neoprene, or silicone diaphragm
Pressure rating: 0.5 psi forward flow (crack); 1.9 psi secure back-pressure seal

Item #	Description	Catalog Pg.	Price
Item 96315	1/8" Hose Barb x 1/4" Hose Barb Natural Nylon Enlarging Check Valve with Silicone Diaphragm 0.86/Each In Stock Save 5% when you buy 30+ Save 10% when you buy 60+ Save 15% when you buy 180+	P-279	0.86/Each In Stock
Item 96329	1/8" Hose Barb x 3/8" Hose Barb Natural Nylon Enlarging Check Valve with Silicone Diaphragm 0.88/Each In Stock Save 5% when you buy 30+ Save 10% when you buy 60+ Save 15% when you buy 180+	P-279	0.88/Each In Stock
Item 96324	1/8" Hose Barb x 3/16" Hose Barb Natural Nylon Enlarging Check Valve with Silicone Diaphragm 0.85/Each In Stock Save 5% when you buy 30+ Save 10% when you buy 60+ Save 15% when you buy 180+	P-279	0.85/Each In Stock
Item 96338	3/16" Hose Barb x 1/4" Hose Barb Natural Nylon Enlarging Check Valve with Silicone Diaphragm 0.86/Each In Stock Save 5% when you buy 30+ Save 10% when you buy 60+ Save 15% when you buy 180+	P-279	0.86/Each In Stock
Item 96345	3/16" Hose Barb x 3/8" Hose Barb Natural Nylon Enlarging Check Valve with Silicone Diaphragm 0.88/Each In Stock Save 5% when you buy 30+ Save 10% when you buy 60+ Save 15% when you buy 180+	P-279	0.88/Each In Stock
Item 96352	1/4" Hose Barb x 3/8" Hose Barb Natural Nylon Enlarging Check Valve with Silicone Diaphragm 0.9/Each In Stock Save 5% when you buy 30+ Save 10% when you buy 60+ Save 15% when you buy 180+	P-279	0.9/Each In Stock
Item 96333	1/8" Hose Barb x 3/8" Hose Barb Natural Nylon Enlarging Check Valve with Viton™ Diaphragm 0.91/Each In Stock Save 5% when you buy 30+ Save 10% when you buy 60+ Save 15% when you buy 180+	P-279	0.91/Each In Stock
Item 96326	1/8" Hose Barb x 3/16" Hose Barb Natural Nylon Enlarging Check Valve with Viton™ Diaphragm 0.88/Each In Stock Save 5% when you buy 30+ Save 10% when you buy 60+ Save 15% when you buy 180+	P-279	0.88/Each In Stock
Item 96319	1/8" Hose Barb x 1/4" Hose Barb Natural Nylon Enlarging Check Valve with Viton™ Diaphragm 0.89/Each In Stock Save 5% when you buy 30+ Save 10% when you buy 60+ Save 15% when you buy 180+	P-279	0.89/Each In Stock
Item 96340	3/16" Hose Barb x 1/4" Hose Barb Natural Nylon Enlarging Check Valve with Viton™ Diaphragm 0.89/Each In Stock Save 5% when you buy 30+ Save 10% when you buy 60+ Save 15% when you buy 180+	P-279	0.89/Each In Stock
Item 96349	1/4" Hose Barb x 3/8" Hose Barb Natural Nylon Enlarging Check Valve with Neoprene Diaphragm 0.93/Each In Stock Save 5% when you buy 30+ Save 10% when you buy 60+ Save 15% when you buy 180+	P-279	0.93/Each In Stock
Item 96330	1/8" Hose Barb x 3/8" Hose Barb Gamma Stable Natural Polycarbonate Enlarging Check Valve with Silicone Diaphragm 1.2/Each In Stock Save 5% when you buy 30+ Save 10% when you buy 60+ Save 15% when you buy 180+	P-279	1.2/Each In Stock
Item 96322	1/8" Hose Barb x 3/16" Hose Barb Gamma Stable Natural Polycarbonate Enlarging Check Valve with Silicone Diaphragm 0.88/Each In Stock Save 5% when you buy 30+ Save 10% when you buy 60+ Save 15% when you buy 180+	P-279	0.88/Each In Stock
Item 96316	1/8" Hose Barb x 1/4" Hose Barb Gamma Stable Natural Polycarbonate Enlarging Check Valve with Silicone Diaphragm 0.95/Each Out of Stock (On Order) Save 5% when you buy 30+ Save 10% when you buy 60+ Save 15% when you buy 180+	P-279	0.95/Each Out of Stock (On Order)
Item 96343	3/16" Hose Barb x 3/8" Hose Barb Gamma Stable Natural Polycarbonate Enlarging Check Valve with Silicone Diaphragm 1.17/Each Out of Stock (On Order) Save 5% when you buy 30+ Save 10% when you buy 60+ Save 15% when you buy 180+	P-279	1.17/Each Out of Stock (On Order)
Item 96336	3/16" Hose Barb x 1/4" Hose Barb Gamma Stable Natural Polycarbonate Enlarging Check Valve with Silicone Diaphragm 0.93/Each Out of Stock (On Order) Save 5% when you buy 30+ Save 10% when you buy 60+ Save 15% when you buy 180+	P-279	0.93/Each Out of Stock (On Order)
Item 96353	1/4" Hose Barb x 3/8" Hose Barb Gamma Stable Natural Polycarbonate Enlarging Check Valve with Silicone Diaphragm 1.07/Each Out of Stock (On Order) Save 5% when you buy 30+ Save 10% when you buy 60+ Save 15% when you buy 180+	P-279	1.07/Each Out of Stock (On Order)
Item 96331	1/8" Hose Barb x 3/8" Hose Barb Natural Polypropylene Enlarging Check Valve with Silicone Diaphragm 0.86/Each In Stock Save 5% when you buy 30+ Save 10% when you buy 60+ Save 15% when you buy 180+	P-279	0.86/Each In Stock
Item 96323	1/8" Hose Barb x 3/16" Hose Barb Natural Polypropylene Enlarging Check Valve with Silicone Diaphragm 0.88/Each In Stock Save 5% when you buy 30+ Save 10% when you buy 60+ Save 15% when you buy 180+	P-279	0.88/Each In Stock
Item 96317	1/8" Hose Barb x 1/4" Hose Barb Natural Polypropylene Enlarging Check Valve with Silicone Diaphragm 0.98/Each In Stock Save 5% when you buy 30+ Save 10% when you buy 60+ Save 15% when you buy 180+	P-279	0.98/Each In Stock
Item 96344	3/16" Hose Barb x 3/8" Hose Barb Natural Polypropylene Enlarging Check Valve with Silicone Diaphragm 0.96/Each In Stock Save 5% when you buy 30+ Save 10% when you buy 60+ Save 15% when you buy 180+	P-279	0.96/Each In Stock
Item 96337	3/16" Hose Barb x 1/4" Hose Barb Natural Polypropylene Enlarging Check Valve with Silicone Diaphragm 1.09/Each In Stock Save 5% when you buy 30+ Save 10% when you buy 60+ Save 15% when you buy 180+	P-279	1.09/Each In Stock
Item 96354	1/4" Hose Barb x 3/8" Hose Barb Natural Polypropylene Enlarging Check Valve with Silicone Diaphragm 1.04/Each In Stock Save 5% when you buy 30+ Save 10% when you buy 60+ Save 15% when you buy 180+	P-279	1.04/Each In Stock
Item 96334	1/8" Hose Barb x 3/8" Hose Barb Natural Polypropylene Enlarging Check Valve with Viton™ Diaphragm 1.02/Each In Stock Save 5% when you buy 30+ Save 10% when you buy 60+ Save 15% when you buy 180+	P-279	1.02/Each In Stock
Item 96327	1/8" Hose Barb x 3/16" Hose Barb Natural Polypropylene Enlarging Check Valve with Viton™ Diaphragm 1/Each In Stock Save 5% when you buy 30+ Save 10% when you buy 60+ Save 15% when you buy 180+	P-279	1/Each In Stock
Item 96320	1/8" Hose Barb x 1/4" Hose Barb Natural Polypropylene Enlarging Check Valve with Viton™ Diaphragm 1.01/Each Out of Stock (On Order) Save 5% when you buy 30+ Save 10% when you buy 60+ Save 15% when you buy 180+	P-279	1.01/Each Out of Stock (On Order)
Item 96347	3/16" Hose Barb x 3/8" Hose Barb Natural Polypropylene Enlarging Check Valve with Viton™ Diaphragm 1.02/Each In Stock Save 5% when you buy 30+ Save 10% when you buy 60+ Save 15% when you buy 180+	P-279	1.02/Each In Stock
Item 96341	3/16" Hose Barb x 1/4" Hose Barb Natural Polypropylene Enlarging Check Valve with Viton™ Diaphragm 1.01/Each In Stock Save 5% when you buy 30+ Save 10% when you buy 60+ Save 15% when you buy 180+	P-279	1.01/Each In Stock
Item 96350	1/4" Hose Barb x 3/8" Hose Barb Natural Polypropylene Enlarging Check Valve with Neoprene Diaphragm 1.03/Each In Stock Save 5% when you buy 30+ Save 10% when you buy 60+ Save 15% when you buy 180+	P-279	1.03/Each In Stock
Item 96332	1/8" Hose Barb x 3/8" Hose Barb Natural Kynar® Enlarging Check Valve with Viton™ Diaphragm 2.21/Each In Stock Save 5% when you buy 30+ Save 10% when you buy 60+ Save 15% when you buy 180+	P-279	2.21/Each In Stock
Item 96325	1/8" Hose Barb x 3/16" Hose Barb Natural Kynar® Enlarging Check Valve with Viton™ Diaphragm 2.01/Each In Stock Save 5% when you buy 30+ Save 10% when you buy 60+ Save 15% when you buy 180+	P-279	2.01/Each In Stock
Item 96318	1/8" Hose Barb x 1/4" Hose Barb Natural Kynar® Enlarging Check Valve with Viton™ Diaphragm 2.08/Each In Stock Save 5% when you buy 30+ Save 10% when you buy 60+ Save 15% when you buy 180+	P-279	2.08/Each In Stock
Item 96346	3/16" Hose Barb x 3/8" Hose Barb Natural Kynar® Enlarging Check Valve with Viton™ Diaphragm 2.23/Each In Stock Save 5% when you buy 30+ Save 10% when you buy 60+ Save 15% when you buy 180+	P-279	2.23/Each In Stock
Item 96339	3/16" Hose Barb x 1/4" Hose Barb Natural Kynar® Enlarging Check Valve with Viton™ Diaphragm 2.1/Each In Stock Save 5% when you buy 30+ Save 10% when you buy 60+ Save 15% when you buy 180+	P-279	2.1/Each In Stock
Item 96335	1/8" Hose Barb x 3/8" Hose Barb Natural Polycarbonate Enlarging Check Valve with Viton™ Diaphragm 1.02/Each In Stock Save 5% when you buy 30+ Save 10% when you buy 60+ Save 15% when you buy 180+	P-279	1.02/Each In Stock
Item 96328	1/8" Hose Barb x 3/16" Hose Barb Natural Polycarbonate Enlarging Check Valve with Viton™ Diaphragm 0.99/Each In Stock Save 5% when you buy 30+ Save 10% when you buy 60+ Save 15% when you buy 180+	P-279	0.99/Each In Stock
Item 96321	1/8" Hose Barb x 1/4" Hose Barb Natural Polycarbonate Enlarging Check Valve with Viton™ Diaphragm 1/Each Out of Stock (On Order) Save 5% when you buy 30+ Save 10% when you buy 60+ Save 15% when you buy 180+	P-279	1/Each Out of Stock (On Order)
Item 96348	3/16" Hose Barb x 3/8" Hose Barb Natural Polycarbonate Enlarging Check Valve with Viton™ Diaphragm 1.01/Each In Stock Save 5% when you buy 30+ Save 10% when you buy 60+ Save 15% when you buy 180+	P-279	1.01/Each In Stock
Item 96342	3/16" Hose Barb x 1/4" Hose Barb Natural Polycarbonate Enlarging Check Valve with Viton™ Diaphragm 0.99/Each In Stock Save 5% when you buy 30+ Save 10% when you buy 60+ Save 15% when you buy 180+	P-279	0.99/Each In Stock
Item 96351	1/4" Hose Barb x 3/8" Hose Barb Natural Polycarbonate Enlarging Check Valve with Neoprene Diaphragm 1.02/Each Out of Stock (On Order) Save 5% when you buy 30+ Save 10% when you buy 60+ Save 15% when you buy 180+	P-279	1.02/Each Out of Stock (On Order)