Flapper Check Valve Vs. Spring Check Valve (4K)
Quick comparison between flapper and spring loaded one way check valves.
In this video, we break down two common types of one-way check valves, the flapper valve and the spring-loaded valve. We see how they work, their pros and cons, and where each is best used. We’ll disassemble and reassemble step by step, and explain how water flow opens or closes each mechanism. We discuss the strengths of the flapper valve (low pressure loss, long lifespan, high temperature resistance) along with its weaknesses (slight back leakage, orientation issues), and then compare it to the spring check valve, which works in any orientation and provides a tighter seal but has higher pressure loss and limited lifespan due to rubber and plastic parts. Whether you’re a DIYer, maker, or just curious about plumbing technology, this video offers a simple, hands-on explanation of check valves and will help you understand which type may be right for your project.
Flapper
PRO: Low water pressure loss, long life, higher temperature resistant.
CON: limited orientation (if horizontal, the cap must be up. If vertical "flow up" only), back leakage
Spring
PRO: Any orientation, no back leakage
CON: Pressure loss, more limited life
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