BULLETIN 52

LEAKING TEMPERATURE AND PRESSURE RELIEF VALVE

SYMPTOMS

•Water seeping around the relief valve tank connection

•Leakage at the threaded portion of the relief valve connection

•Intermittent weeping and/or dribbling from the relief valve

•Large volume of hot water sporadically discharged from the relief valve

GENERAL

The temperature and pressure relief valve (T & P) is a safety device limiting temperature and pressure levels in a water heater. Each T & P has both a temperature and pressure rating.

Normally, the temperature and pressure relief valve will have a temperature rating of 210°F. A probe (part of the relief valve) extends into the tank measuring the stored water temperature. This probe must be within the top six inches of the water heater. If the water heater’s thermostat malfunctions, higher than normal water temperatures could be produced. Once the probe senses a temperature approaching its temperature rating, the relief valve will open to full capacity releasing “very hot” water until the temperature is below its reset temperature.

The pressure rating on the relief valve should be the same or less than the certified working pressure of the tank (generally 150 psi) and be below the lowest maximum working pressure rating of any system components. Once the pressure in the tank reaches the valve’s pressure rating, it will slightly open relieving the pressure. Relieving of pressure can be noted as “dribbling” or “weeping” water from the relief valve.

If an incorrectly sized temperature and pressure relief valve is installed, the warranty will be void.

THE FIX

Follow these easy steps to diagnose thermal expansion:

•Intermittent weeping and/or dribbling at the relief valve - The relief valve relieves water slowly when actuating on pressure. A closed system can cause pressure to increase in the system. This condition is called thermal expansion. For additional information regarding thermal expansion please see Bulletin 45.

•Leaking at the spud of the water heater - Spuds are welded to the tank and are not repairable. The heater should be replaced.

•Leakage at the threaded relief valve connection - Remove relief valve and reseal connection.

•Large volume of hot water sporadically discharged from the relief valve - The relief valve relieves water quickly when actuating on temperature. The only cause of this problem is a malfunctioning thermostat.

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State Industries GS6, GSX, GPX manual Leaking Temperature and Pressure Relief Valve, General
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GPX, GS6, GSX specifications

State Industries offers a range of high-quality residential and commercial water heaters that cater to diverse customer needs. Among their prominent models are the GSX, GS6, and GPX, each equipped with unique features, advanced technologies, and distinct characteristics that enhance their performance and efficiency.

The GSX series is well-known for its energy efficiency and reliability. It utilizes a high-efficiency gas burner to provide fast recovery rates, making it suitable for households with high hot water demand. The GSX water heaters are designed with a Foam Insulation System that minimizes heat loss and maximizes energy conservation. Additionally, their innovative design includes a durable glass-lined tank to prevent corrosion, ensuring long-term performance and extended lifespan.

Moving on to the GS6 model, this water heater is characterized by its user-friendly control features, including an adjustable thermostat that allows for precise temperature settings. The GS6 is built with a robust gas control valve that enhances efficiency and helps maintain consistent water temperature. The model is also designed with an anode rod that minimizes corrosion, prolonging the life of the tank. Its standing pilot light system provides reliable ignition, while its compact design makes it suitable for various installation locations, even in tight spaces.

The GPX series stands out in the market with its advanced technological features and sleek design. It integrates smart technologies designed to monitor and optimize performance. The built-in diagnostics programmable control allows users to track system performance and troubleshoot any potential issues easily. The GPX models also come equipped with a high-efficiency condensing gas burner that maximizes energy use, contributing to reduced utility bills. Furthermore, their stainless steel construction adds to their durability and resistance against rust and corrosion.

In summary, State Industries' GSX, GS6, and GPX models represent innovation in the water heating industry. They incorporate energy-efficient technologies, durable materials, and user-friendly controls, making them reliable choices for both residential and commercial applications. With custom features tailored to meet varied needs, these water heaters uphold State Industries' commitment to quality and customer satisfaction, ensuring that users enjoy consistent hot water while being conscious of energy consumption.
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