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How to Repair / Replace Broken Pressure Relief Valve on a Water Heater

2/27/2019

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Broken Pressure Relief valve can flood your basement, increase you energy spending, and in the works case, it can explode, and pose serious health risks!
You should test your pressure relief valve every 6-9 months (this takes only 3-5 minutes), and if it starts leaking, replace it IMMEDIATELY!
To test the valve, you will need a small container – about 1/2 gallon. Once you have your gloves and goggles on, unscrew/remove drain tube off the valve.

Place water container directly under valve outlet (which should be facing down).
Now open the valve slightly (about 60 degrees from its original position). Be sure not to open it all the way, or HOT water will start pouring down.

When you open the valve, the water should start coming out rapidly, under pressure, and you will hear hissing noise. This means your valve is working properly.
If water is not coming out – valve is broken.

HOW to Fix / Replace Broken Pressure Relief Valve:

First – be VERY CAREFUL – water in the tanks is VERY HOT. I’m not responsible if you injure yourself … wear gloves and safety goggles, and use utmost caution. If you do not feel comfortable doing this yourself, contact a water heater service provider.

STEP 1 What you need to do, is shut off the cold water intake AND gas (dialer on the water heater control) or circuit breaker for the heater (if electric).
Then connect a water hose to BOTTOM outlet. Put hose in 5 gallon bucket or run outside your basement. Again, WATER IN THE TANK IS STILL VERY HOT!
Drain about 5-10 gallons (depending on how high up the pressure valve is).  Contact Professional Maintenance Provider in Dubai

STEP 2 Once you drain the water, remove the discharge tube / pipe off the relief valve.
Gently open pressure valve HALF WAY (not all the way) to see if water still coming out of it. Put a small bucket or container right under the valve.
If water is coming out, drain another 5 gallons, and repeat.
Once water stops coming out, use plumbers pipe wrench to unscrew the valve.

STEP 3 Now go to Home Depot / Lowe’s or other local home improvement store and buy a new valve with the SAME pressure setting, and a roll of teflon tape.
When you buy your parts, put teflon tape on new valve threads clockwise, and screw in new valve tightly.
You can also get one online.
Be sure to get the right size, or you will have to go get a replacement!

STEP 4 Now open cold water and put gas setting back to normal (or turn on circuit breaker if electric).
Once tank is full, again gently open pressure relief valve and let a little water out (2-3 ounces). Remember, water will be hot, so be careful.
Once you drain 2-3 OZ, and close valve back, see if water is still coming out. It should not!
If all is good, put discharge tube/pipe back on. You are done!
You should test the pressure valve avery 6-9 months! Just repeat the open / drain 2-3 oz procedure, to make sure the valve is good.

That’s it! You are now a DIY water heater specialist!
If you want to know how much a new water heater costs, see our pricing guide.

For more info contact water heater maintenance company in dubai or call us at +971 4 252 2966
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  • Home
  • About Us
  • Services
    • Water Pump Repair >
      • Booster Pump Repair Dubai
      • Transfer Pump Repair Dubai
      • Submersible Pump Repair Dubai
      • Chilled Water Pump Repair Dubai
      • Pressure Vessel Repair Dubai
      • AMC
    • Water Pumps >
      • Booster Pump Set
      • Water Pump >
        • Centrifugal Pumps
        • Vertical Multistage Pumps
        • Circulation Pumps
        • Submersible Pumps
      • Swimming Pool Pump
    • Solar Water Heater Dubai >
      • Heat Pumps
      • Solar Water Heater Maintenance
    • Pressure Vessel
    • GRP Water Tank >
      • GRP Internal Tie Rod Tank
    • Water Storage Tanks
    • ABB Motors
  • Contact Us