The drain valve on your water heater is the point where hot water is drained from the tank during maintenance. These valves fail due to corrosion, improper installation, and wear and tear, leading to flooding and water damage.
If you’re wondering why your water heater is leaking from the drain valve, or if you need water heater maintenance, installation, or repair services, rely on the expert team at High 5 Plumbing, Heating, Cooling, & Electric.
What Is a Water Heater Drain Valve?
Drain valves are typically located at the bottom of traditional tank-type water heaters. In most cases, they have threaded ends that fit a standard garden hose, making flushing and draining the tank easier during routine maintenance.
Function and importance
A drain valve is the connection point for a hose, allowing a plumber to drain and maintain the water heater tank. Regular, professional maintenance keeps the tank clear of accumulated sediment and debris that can cause premature breakdowns, a common issue in the Denver area due to the relatively hard water.
Types of drain valves
Drain valves are interchangeable, as long as they’re the same size and are installed professionally. The following are the most common types of water heater drain valves.
Brass valves
Brass is the ideal material for hot water systems because it can withstand high temperatures and is generally resistant to corrosion. It’s also the most expensive, so it’s unlikely your residential water heater would come with a brass drain valve installed.
Plastic valves
Plastic drain valves are the least expensive type of drain valve, but they also experience the most problems, including cracking or clogging with sediment. They can also be challenging to remove, potentially causing damage to the water heater.
Combos (brass/plastic hybrid)
Hybrid drain valves combine the lower cost of plastic parts with the sturdiness of brass. Depending on your heater and needs, this may be the best option. Consider asking your plumber to replace an older plastic valve with a longer-lasting hybrid or brass valve.
Common Causes of Water Heater Drain Valve Failure
Some of the most common reasons water heater drains fail in the Mile High City area include:
- Sediment buildup
- Corrosion and rust
- Wear and tear
- Improper use
- Faulty installation
- High water pressure
- Extreme temperatures
Signs Your Drain Valve Has Failed
These signs mean it’s probably time for a drain valve replacement.
Leakage from the valve
If hot water is consistently dripping from your drain valve, consider replacing it immediately to prevent total failure and potential flooding.
Inability to open or close the valve
A stuck valve indicates that sediment or corrosion is causing it to become jammed. This may eventually lead to serious leaks and total failure, so it’s a good time to call a plumber.
Clogging and slow drainage
If draining your water heater tank takes a long time, or if the water doesn’t come out at all, there’s probably sediment stuck in the valve. Replacement is your best option when this happens.
Visible damage
Sometimes, you can see cracks or other damage on the outside of the valve. If you notice an issue with the valve, contact a plumber for replacement.
How To Fix or Replace a Failing Drain Valve
Do you need a fix for your water heater drain valve now? There are several things you can do.
Temporary fixes
Some quick ways to fix a failing drain valve include capping it with a garden hose cap or applying sealant or plumber’s tape where it’s leaking. These stopgap measures should only be used until a plumber can get to your home to provide a more permanent solution to the leak.
Cleaning sediment clogs
Cleaning out sediment clogs isn’t usually a DIY job. There’s a potential risk of damaging the valve, especially if it’s made from plastic. Schedule a water heater maintenance appointment with High 5. If sediment is in the drain, it’s likely also in the tank, so a full tank flush may be necessary.
Replacing the valve
It’s best to leave valve replacement to a certified plumber because it involves turning off the power and fuel sources, draining scalding hot water, and using specific tools. There’s potential for injury, property damage, and flooding if you’re inexperienced.
Tips To Prevent Drain Valve Failures
Follow these tips to avoid premature drain valve failure on your water heater:
- Regular tank maintenance: Have your water tank serviced annually for optimal functionality.
- Use high-quality valves: Cheap plastic valves are more likely to break down than high-quality alternatives. Upgrade your valves for better longevity.
- Monitor tank pressure: High water pressure may damage the valves. Monitor the pressure to maintain water tank stability.
- Winterize outdoor heaters: Proper insulation and drainage are key during freezing temperatures.
- Schedule inspections: Regular water heater inspections are important for identifying and addressing small issues before they escalate into major problems.
Risks of Ignoring a Failing Drain Valve
If you ignore a failing drain valve, you risk costly damage and reduced energy efficiency.
Water damage
Even a small water leak can cause significant damage over time. The water can seep into the floors, walls, and surrounding structures, causing structural issues and mold growth.
Reduced water heater efficiency
If your water heater’s leaking from the drain valve, it’ll have a harder time maintaining consistent hot water in your home and use more energy trying to keep up with demands.
Tank damage
A leaky valve may damage the water heater tank due to increased wear and tear and ongoing temperature fluctuations caused by the constant influx of water.
Increased repair costs
The longer you leave a drain valve problem
