Description
Product Overview
The PowerMax 4008-101-AE65 is a 12‑volt, aluminum‑body water pump engineered for RVs, vans and other mobile living spaces. Delivering a steady 3 gallons per minute at up to 55 PSI, it features a one‑piece diaphragm and internal bypass that provide long‑life performance and low‑cycle quiet operation. Weighing only 4 pounds and measuring 10.28 x 5.67 x 4.92 inches, the pump can be installed vertically or horizontally and self‑primes up to 9 feet. Included are a mesh strainer and a factory‑set pressure switch that cuts on at 25 PSI (±5) and shuts off at 45 PSI, adjustable between 30‑50 PSI for precise control.
Usage
Designed for universal fit, this pump serves fresh‑water supply, waste‑water disposal, and external hosing needs in RVs, camper vans and tiny homes. Whether you are refilling a freshwater tank, running a shower, or connecting a garden hose at a campsite, the pump’s 12‑volt DC operation integrates seamlessly with standard vehicle batteries. Its lightweight construction makes it easy to mount in tight spaces, and the self‑priming capability ensures reliable start‑up even after periods of inactivity. 
Why Choose Us
PowerMax combines automotive‑grade aluminum durability with a patented diaphragm design that reduces wear and eliminates the need for frequent maintenance. Each unit undergoes rigorous testing to meet a 4.6‑star rating from over 300 verified users, confirming consistent flow, quiet operation and dependable shut‑off performance. The included pressure switch provides built‑in safety, protecting your plumbing from over‑pressurization. Backed by a manufacturer warranty and supported by a responsive customer service team, this pump offers peace of mind for long‑term road travel.
Key Features
- Aluminum housing for corrosion resistance and lightweight portability
- 3 GPM flow rate with 55 PSI maximum pressure for strong water delivery
- Self‑priming up to 9 feet, suitable for vertical or horizontal mounting
- Factory‑set pressure switch (45 PSI shut‑off, 25 PSI start) with adjustable range
- Universal fit for RVs, vans, campers and portable water systems
FAQ
Can this pump be used for both potable and non‑potable water?
Yes, the pump is rated for potable water applications such as fresh‑tank refilling, as well as non‑potable uses like waste disposal and external hosing.
What is the maximum vertical lift the pump can handle?
The self‑priming design allows the pump to lift water up to 9 feet vertically without loss of performance.
Is the pressure switch adjustable?
Factory set at 45 PSI shut‑off, the switch can be manually adjusted between 30 PSI and 50 PSI to suit specific system requirements.
Do I need a separate battery for operation?
No external batteries are required; the pump runs directly from a 12‑volt DC source, typically the vehicle’s existing battery.
How do I install the pump?
Mount the pump securely using the provided brackets, connect the inlet and outlet hoses, and attach the power leads to a 12‑V source. The included mesh strainer helps prevent debris entry during installation.





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