About this video

Think your "self-priming" water pump actually primes itself? It doesn't- and the confusion costs guys a lot of frustration on the job. Here's what's really going on, in 45 seconds. 👇 🔑 THE MISCONCEPTION "Self-priming" doesn't mean the pump fills itself with water. It means the pump MAINTAINS its prime between uses — so you don't have to refill it every single time you start it up. You still have to prime it ONCE - fill the pump housing with water before the first start. After that, the pump takes care of holding onto it. 🔧 MEET THE FLAPPER VALVE The flapper valve is the small one-way gate inside the pump that makes this possible: • Lets water IN when the pump is running • Stops water from flowing back OUT when the pump shuts off • Result: the housing stays full, so the pump re-primes instantly next time you fire it up ❌ WITHOUT A FLAPPER VALVE Water drains back out the suction line every time you stop the pump. You'd have to manually refill and prime before EVERY start. Huge time waster on the job. ✅ WITH A FLAPPER VALVE Prime once. Keep Pumping. As long as there's water in the housing, your pump fires right back up ready to work. If your "self-priming" pump suddenly stops holding prime, your flapper valve is the FIRST thing to check. 🛠 Replacement flapper valves, pump overhaul kits, and critical components are in-stock at DHS Equipment. We stock Wacker Neuson, Multiquip, Honda, Husqvarna & more.