Drain Valve, Brass

Rheem SP330090 Brass Drain Valve – OEM Replacement for Tank Draining

The Rheem SP330090 is a factory-authorized brass drain valve engineered for residential water heaters. Designed to facilitate sediment removal and tank flushing, this component provides a durable, corrosion-resistant interface for periodic maintenance procedures. It is manufactured to Rheem’s OEM specifications for pressure, flow, and service longevity.

Component Overview

• Body Material: Forged brass
• Thread Type: 3/4” male NPT inlet
• Outlet: Hose thread for standard garden hose connection
• Function: Manual drain valve for tank drainage and sediment flushing
• Operating Pressure: Rated for typical residential heater service pressures

Use Case and Functionality

This valve is used in electric and gas-fired tank-type water heaters. Positioned at the bottom of the tank, it allows controlled drainage to remove accumulated sediment and scale, which can otherwise reduce heating efficiency and shorten tank life. Its brass construction resists dezincification and corrosion under normal potable water conditions, supporting long service intervals.

Installation Guidelines

• Use thread sealant (PTFE tape or pipe dope) on male threads before installation.
• Hand-tighten, then finish tightening with a wrench. Do not over-torque.
• Confirm valve orientation allows full access for servicing and hose attachment.
• Verify shut-off integrity after system is re-pressurized.

Installation is straightforward but should be performed with the tank depressurized and electrically isolated. While suitable for field replacement, it’s recommended that licensed personnel conduct the work to ensure code compliance and prevent tank damage.

Contractor Considerations

For Professionals: The SP330090 is a direct-fit, OEM part that meets Rheem's quality control and pressure handling standards. Its hose-threaded outlet makes flushing procedures clean and efficient. Stocking this part ensures quick turnaround for common field replacements without modification or retrofitting.

For Maintenance Teams: Routine draining using this valve can extend the service life of tank-type heaters and improve heat transfer efficiency. Integrating this part into scheduled maintenance protocols helps reduce sediment-related failures and callbacks.

Product Advantages

• Forged Brass Body: Provides high resistance to corrosion and mechanical fatigue
• Thread Compatibility: Fits standard residential water heater drain ports
• OEM Fit: No adapter required for Rheem water heater models
• Field-Ready: Ships as a complete unit, ready for installation

Specifications Summary

• Model: SP330090
• Material: Brass
• Inlet: 3/4" Male NPT
• Outlet: Hose thread (3/4” GHT)
• Application: Residential tank-type water heaters