Our adapter fits **DIRECTLY** onto **non-threaded pumps** Such as the patented (US D910,084 S) Pump we offer with simple friction-fit - **NO collar required**. Press adapter straight onto pump nozzle → Secure seal, no threads, no extra parts. Ready to pump in seconds. - NOTE: This does not fit older Rotopax models that utilize the Scepter branded cap. If your cap says "Scepter" this will not work.​ Embark on your overland adventures with the convenience of running water, courtesy of our new Overland Water Container Water Pump Adapter Kits! Elevate your camping experience with the ease of access to water for drinking, handwashing, or dishwashing. Our adapters seamlessly fasten to your Water Container, providing a secure and reliable connection for your rechargeable water pump. No more struggles or spills – just a hassle-free adaptation that enhances the functionality of your water container!