Goulds Aquavar SOLO 2™ 3AS20, 3/4 to 2HP, 230V, 3 Phase Output, Constant Pressure Controller

The Goulds Aquavar SOLO 2™ 3AS20 is a constant-pressure system controller from the Aquavar SOLO 2™, built to run a 2 HP submersible well pump with single-phase 230V input and variable-frequency three-phase output while maintaining steady water pressure automatically. For homeowners on well water, agricultural and light commercial property managers, and contractors specifying reliable pump controls, it is designed to help provide reliable pressure at the faucet and in the shower, with consistent water flow across showers, faucets, and other appliances even when multiple fixtures are in use.

The Goulds Aquavar SOLO 2 3AS20 is a variable-speed, constant-pressure controller for submersible well pumps, supporting motors 3/4 to 2 HP in residential and light commercial water systems. It includes a NEMA 3R-rated enclosure for indoor or outdoor placement, giving you a protected control box with a simple user interface and durable housing. Users can set pressure targets with a light touch, fine-tune pressure levels and turn-on and turn-off behavior, and understand status changes without technical guesswork. It can also retrofit existing well systems for constant pressure.

Variable speed control helps reduce pump cycling, cut energy use, and extend pump and system life through smoother operation as demand changes, supporting longer-lasting well system performance. The diagnostic interface includes an LED display showing system performance metrics, plus an included pressure sensor with shielded cable to provide a reliable control signal for monitoring and response. Features also include built-in motor protection against dry wells and power surges, protection on long leads, and an operating relay that allows external equipment to operate automatically from the controller when needed or add an additional sensor signal into the system. This overview covers the 3AS20’s key features, specifications, installation and setup advantages, warranty details, and the practical benefits of automatic pressure control for anyone choosing a dependable well water pressure solution.

Specification and Warranty Information

SKU# Goulds-3AS20

Manufacturer: Goulds

Model #: Goulds-3AS20

Warranty: 3 Year Limited

Shipping Weight: 23 lbs

Universal Product Code: 726714830947

For residential and light commercial use, the Goulds Aquavar SOLO 2™ 3AS20 is a recommended solution built for the reliable day-to-day performance you expect, with variable speed operation that can save space by allowing smaller tank setups, especially when paired with high-quality water system products and treatment solutions. If you're interested in setup details and product specifications, see the resources below.

Aquavar SOLO2 Installation Guide

Technical Brochure

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The Goulds Aquavar SOLO 2™ 3AS20 constant pressure controller is a top choice for managing well water systems with precision and efficiency. This advanced controller supports a wide range of motor sizes and offers seamless integration with both conventional system setups and modern variable speed motors. Available for purchase online and backed by reliable delivery and customer support, it ensures optimal performance and long-lasting pump protection for residential, agricultural, and light commercial water needs.