The Flush Blog
Everything you need to know about water heater care, troubleshooting, and repair.
How to Fix a Leaking Water Heater Relief Valve: Step-by-Step Guide
Is your water heater's T&P relief valve dripping or running? Learn the exact causes of a leaking relief valve—from high pressure to sediment—and follow our step-by-step guide to test, diagnose, and replace it yourself.
How to Drain an Electric Hot Water Heater: Safe DIY Guide
A step-by-step DIY guide on how to safely drain an electric hot water heater to remove sediment, protect elements, and extend tank life in 2026.
How Long Do Water Heaters Last? Complete Lifespan Guide
Water heaters last 8-20 years depending on type. Learn what shortens lifespan and how to get the most years from yours.
Electric vs Gas Water Heater: Complete Comparison Guide
Compare electric and gas water heaters on cost, efficiency, lifespan, and safety. Find out which type fits your home.
Hot Water Heater Not Working: Complete Troubleshooting Checklist
No hot water? Run through this checklist to diagnose the problem before calling a plumber. Covers gas and electric.
How to Insulate a Water Heater to Save Energy
A water heater blanket can cut standby heat loss by 25-45%. Here is how to install one safely in under an hour.
Tankless Water Heater Pros and Cons: An Honest Assessment
Tankless water heaters save energy but cost more upfront. Here is what manufacturers do not tell you.
Water Heater Anode Rod Replacement: Step-by-Step Guide
Replace your anode rod in under an hour. This guide covers tools, rod types, and the exact process to protect your tank.
Water Heater Expansion Tank: Do You Need One?
Expansion tanks prevent pressure damage in closed plumbing systems. Find out if your home needs one and how to install it.
Water Heater Leaking from Bottom: Causes and Fixes
Water pooling under your water heater? Here are the 6 most common causes and how to fix each one before it floods.
Water Heater Pilot Light Won't Stay Lit: Troubleshooting and Fix Guide
Pilot light keeps going out? Walk through the 6 most common causes and learn which fixes you can handle yourself.
Water Heater T&P Relief Valve: Testing and Replacement Guide
The T&P valve is your water heater's most important safety device. Learn how to test it and when to replace it.
Water Heater Maintenance Schedule Checklist (Seasonal Guide)
A month-by-month water heater maintenance schedule covering flushing, anode rod checks, T&P valve tests, and seasonal prep for gas and electric units.
Best Tankless Water Heaters
The best tankless water heaters for 2026 compared. Rinnai, Rheem, Navien, and Noritz models rated by flow rate, efficiency, and value.
How to Flush Sediment from Your Water Heater
Step-by-step guide to flushing sediment from your water heater. Prevent popping noises, efficiency loss, and premature tank failure with annual flushing.
Water Heater Making Noise: Troubleshooting Guide
Water heater making noise? Identify popping, rumbling, screeching, humming, and knocking sounds. Each noise has a specific cause and fix.
Water Heater Thermostat Adjustment Guide
How to adjust your water heater thermostat for safety, efficiency, and comfort. Covers gas and electric models, ideal temperature settings, and troubleshooting.
Electric vs. Gas Water Heaters: Cost, Efficiency, and Performance Compared
Gas heats faster and costs less to operate. Electric is safer and cheaper to install. Here is the full comparison.
How Hard Water Destroys Your Water Heater (And What to Do About It)
Hard water causes sediment buildup, scale on heating elements, and premature tank failure. Prevention saves thousands.
How to Flush Your Water Heater: Step-by-Step Guide
Sediment builds up in your tank every year, reducing efficiency and shortening lifespan. Flushing takes 30 minutes and costs nothing.
7 Signs Your Water Heater Is About to Fail
Most water heaters fail between years 8-12. These warning signs give you time to replace before a catastrophic leak.
Tank vs. Tankless Water Heaters: Which One Is Right for Your Home?
A detailed comparison of storage tank and tankless water heaters covering cost, efficiency, lifespan, and installation.
Water Heater Anode Rods Explained: The Part That Saves Your Tank
The anode rod is a sacrificial metal bar that prevents your tank from rusting. Replacing it can double your water heater lifespan.
Do You Need a Water Heater Expansion Tank? What It Does and When It Is Required
When water heats up it expands. An expansion tank absorbs that pressure so your plumbing does not.
Water Heater Pilot Light Won't Stay Lit: Causes and Fixes
A pilot light that keeps going out is one of the most common gas water heater problems. Most causes are inexpensive to fix.
What Size Water Heater Do You Need? A Sizing Guide by Household
An undersized heater runs out of hot water. An oversized one wastes energy. Here is how to calculate the right size.
What Temperature Should Your Water Heater Be Set To?
The default factory setting is 140F but the DOE recommends 120F. Here is why the difference matters for safety and savings.
How to Drain a Hot Water Heater (Safe Guide)
Learn how to drain your hot water heater safely with this complete DIY guide. Covers tools, safety precautions, and troubleshooting for tank-style heaters.
How Often Should You Flush a Water Heater?
Learn the right flushing schedule for your water heater based on water hardness, tank age, and household size. Most homes need it once or twice a year.
How to Back Flush a Water Heater (Break Up Stubborn Sediment)
Learn how to back flush your water heater to remove stubborn sediment that regular draining can't clear. Step-by-step instructions with diagrams.
How to Drain a Water Heater With No Floor Drain
No floor drain near your water heater? Here are five safe methods to drain the tank using a garden hose, sump pump, or bucket relay.
How to Remove Sediment From a Water Heater (Complete Guide)
Remove sediment from your water heater using flushing, back-flushing, vinegar dissolution, and manual cleaning. Covers light to severe buildup.
How to Replace a Water Heater Drain Valve (DIY Guide)
Replace a leaking or clogged water heater drain valve in under an hour. Covers removal, choosing brass vs plastic valves, and installation.
How to Unclog a Water Heater Drain Valve
Clear a clogged water heater drain valve using four proven methods. Covers screwdriver clearing, back-flushing, valve removal, and vinegar soaks.
No Hot Water After Flushing Your Water Heater? Here's Why
Troubleshoot why you have no hot water after flushing your water heater. Common causes include air locks, tripped breakers, and burned-out elements.
Water Heater Drain Valve Leaking: Causes and Fixes
Fix a leaking water heater drain valve with this DIY guide. Covers tightening, replacing, and upgrading valves to stop drips permanently.
Water Heater Not Draining? How to Fix a Clogged Tank
Troubleshoot a water heater that won't drain. Step-by-step fixes for clogged drain valves, sediment blockages, and stuck valves.
Water Heater Making Popping Noises? Here's What It Means
Find out why your water heater is making popping or knocking sounds and learn how to fix it. Sediment buildup is the most common cause.
Water Heater Repair: DIY Fixes vs. When to Call a Plumber
No hot water? Leaking tank? Pilot light won't stay lit? A practical guide to which water heater repairs you can DIY safely and which ones need a professional.
Annual Water Heater Maintenance Checklist (Printable PDF)
Step-by-step yearly water heater maintenance checklist for gas and electric tanks. Flush, inspect the anode rod, test the TPR valve, and more. Printable PDF included.
Best Powered Anode Rods for Water Heaters
Powered anode rods last 20+ years and eliminate rotten egg smell. We compare Corro-Protec and alternatives to help you decide. Expert tested and reviewed for 2026.
Best Tankless Water Heater Flush Kits (2025)
We compared the top tankless water heater flush kits by pump quality, descaling power, and overall value. Here are the 5 best options for DIY descaling.
Best Water Leak Detectors for Water Heaters (2025)
We compared WiFi-enabled and basic water leak detectors to protect your home from water heater leaks. Here are the 5 best options for early leak detection.
Water Heater Safety: 7 Hazards Every Homeowner Should Know
Prevent burns, gas leaks, and electrical shock around your water heater. A practical guide to the safety checks that actually matter.
Water Heater Temperature Settings: Finding the Right Balance
What temperature should your water heater be set to? A plumber explains the 120 vs 140 degree debate, how to check your settings, and when to adjust.
How to Test a Water Heater Element with a Multimeter
How to test electric water heater elements with a multimeter. Check for burnt-out or grounded elements before calling a plumber.
Water Heater Pilot Light Won't Stay Lit: Causes and Fixes
Gas water heater pilot light keeps going out? Here are the most common reasons and how to fix each one, from thermocouple replacement to draft problems.
Gas vs. Electric Water Heater Maintenance: Key Differences
Gas and electric water heaters need different maintenance. Learn what to check on each type and which components are unique to each fuel source.
When to Replace Your Water Heater Anode Rod
Learn how to inspect your water heater's anode rod, spot the warning signs of a depleted rod, and choose between magnesium, aluminum, and powered anode options.
5 Signs Your Water Heater Needs Flushing
Not sure if your water heater needs a flush? These five warning signs tell you it's time to drain the sediment before it causes real damage.
How to Flush a Water Heater (Complete Guide)
Step-by-step guide to flushing your water heater and removing sediment. Includes the vinegar method for stubborn deposits and hard water tips.