Dynadrive DD90-11 NPT 240V Variable Speed Constant Pressure System - 36GPM

The DynaDrive DD90-11NPT is a compact, all-in-one constant pressure system that delivers consistent water pressure on demand. With a maximum flow rate of 36 GPM, it’s an ideal solution for residential homes, irrigation systems, and light commercial use.

This variable speed pump adjusts its motor speed based on water demand, reducing energy consumption while maintaining steady pressure. The DD90 operates quietly and installs easily with standard NPT plumbing connections.

• Whole home water pressure boosting
• Irrigation systems
• Light commercial or agricultural use
• Homes with fluctuating municipal or well water pressure

Warranty Period: 36 months

1. What is a constant pressure pump system?
A constant pressure pump automatically adjusts motor speed to maintain steady water pressure, even when water demand varies—like when multiple showers, faucets, or sprinklers are running at the same time.

2. Does the DynaDrive DD90-11NPT require a pressure tank?
No, the DynaDrive system has an integrated controller that eliminates the need for a large external pressure tank. A small diaphragm tank may still be used for efficiency, but it’s not required.

3. Is this pump suitable for homes with well water?
Yes. The DD90-11NPT works well for boosting pressure from well systems or municipal supplies, as long as water quality is within manufacturer-recommended limits (free of sand, silt, and corrosive elements).

4. What size pipe fittings does it use?
This model has 1” NPT inlet and outlet connections, making it easy to install with standard plumbing.

5. How quiet is the DynaDrive pump?
DynaDrive pumps are known for quiet operation, especially compared to traditional jet pumps or multi-stage centrifugal systems. They’re a great option for indoor or enclosed installations.

6. Is this pump energy efficient?
Yes. Its variable speed motor only runs as fast as needed, which helps reduce electricity usage and wear on the pump.

7. What is the maximum flow rate and pressure?

1. • Max Flow: 36 gallons per minute (GPM)

   • Max Pressure: Around 80 PSI, but varies based on system setup

8. How long will a Davey pump last?
With proper installation and routine maintenance, Davey pumps are built for long service life. Most users report reliable performance for 8–12 years or more, depending on water quality and usage.

9. Can I install it myself or do I need a professional?
While many DIYers can install this pump using standard plumbing tools, we recommend professional installation to ensure optimal setup, safety, and warranty compliance.