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Methods to Restore a Leaking Boiler Reduction Valve Straightforward DIY



How to repair a leaking boiler relief valve. This video show how easy it is to replace a over pressure relief valve and expansion tank and save hundreds of …

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32 Comments
  1. Thank you for your video.

  2. How often should you replace the valve ? I think mine might be old

  3. you have not mentioned anything about setting correct pressure inside expansion tank….

  4. PLUMBER'S CARRY HIGH INSURANCE LIABILITY AND WORKMAN'S POLICIES . ALSO EMPLOYEE SALARIES. LET'S SAY THE PARTS IN HIS ESTIMATE WAS FOR A RELIF VALVE, EXPANSION TANK AND PRESSURE REDUCING VALVE IS $200. THE MECHANICS SALARY ON AVERAGE IS $200 PER DAY. SO LET'S TAKE $75 OUT FOR THIS REPAIR MEANS $275. ADD FUEL COMING AND GOING $15 THE COMPANY COST $290. LET'S ROUND IT OFF TO $300. ADD THE SALES TAX ABOUT $65 MAKES IT $365. FROM $1000 THERE IS $645 LEFT AND THE SHOP FROM THAT HAS TO PAY WORKMAN'S AND LIABILITY POLICIES. SHOP RENT AND ELECTRIC AND CELL PHONES, SECRETARY AND ALSO OTHER TAXES TO UNCLE SAM. SO IF A $645 PROFIT IS TO HIGH. WHAT SHOULD A PROFESSIONAL SHOP MAKE TO SURVIVE. IF A HANDI MADE THE REPAIRS HE WOULD CHARGE $300. SHOULD A SHOP CHARGE THE SAME? OBVIOUSLY NOT. ENCOURAGING HOME OWNERS TO PLAY WITH A HOT WATER HEATING SYSTEM CAN SEVERELY BURN SOMEONE TO SAVE THAT MONEY. A WORD TO THE WISE FOR HOMEOWNER'S TRYING TO SAVE MONEY. YOU'RE TAKING A RISK WHICH IS NOT MENTIONED HERE OF BEING BURNED.

  5. I gotta say something to all who are commenting on this. I too had the PRV on my parents' boiler go tits up. Now I'm pretty handy, and even hold a residential builders license, but this one psyched me out. It's a bomb for Christ's sake. I learned what needed to be done online, but that didn't clear me for take off. So I called in a pro, and just like this video shows, it was a snap. Shut off the power, the water, replace the valve ( the expansion tank was fine), and Bob's your uncle. 5 minutes. $150. No shit. That being said, it could have gone sideways, and had it done so, the pro would have been able to take care of it, because I don't know shit about these systems other than what I learned loosely on Youtube. I try like hell to do what I can, when the need arises, but I will strongly suggest getting a real tech on this action. Just don't pay a grand or more for what this entailed, because that would be a scam job for sure. If not, it is truly as easy as the video shows, provided nothing else goes wrong. Your call.

  6. Between the video and some of the comments, a lot of incorrect and/or misleading information.
    One person mentioned that the tank comes precharged with probably 30 psi of air and that you should pump it up to your incoming city water pressure. WRONG! Not for a boiler that is set up to run typically around 12 to 15 psi.(It is set up with a pressure reducing valve. This guy was think a water heater.
    The video had some good advice relative to releasing a little water from the P&T valve. As sometimes it's just a bit of dirt or the like that gets hung up in the valve preventing it to close properly.
    The expansion tanks vary a bit in design due to age but typically all the newer tanks are equipped with a diaphragm within the tank separating the air side from the water side. The air side is equipped with a schrader valve which allows one to add air. The tank could have been water logged due to a number of reasons. some that would require you to replace the tank and others where you could simply correct the problem. For example: ruptured diaphragm= requires replacement. Loss of air due to possibly a leaky schrader valve.= Replace air valve and refill with air to recommended pressure.
    And yes to those that mentioned the direction of putting on the Teflon tape, there is a preferred direction but it still works either way. Won't get into details here. There certainly are many minor items that can and do get fixed by DIY'ers but there can be unknowns that could get you into trouble. You can't believe everything you see or hear on youtube but it is a good source of info, just be careful. As far as plumbing advice, there are Plumbing Forums that have professionals that try to help you out. Excellent source of information. But even then, there are differences of opinions but that's everywhere in life. "Measure 3 times and cut once." 😉

  7. You didn’t have to add air to the tank? Usually it comes with 30 psi already but I learn that they are supposed to contain the same amount of pressure that the water hose puts out witch in my City is around 55 psi.

  8. The first 10 seconds of this video saved me at least a $100 diagnostic visit, possibly more depending on the technician. Thanks!

  9. I a cast iron boiler is leaking.what can I do? please.

  10. 2:20 did he say something important there?

  11. HVAC companies are some of the most dishonest people I've ever met.

  12. Tefloned wrong! Filled system and didn’t purge zones! Not All plumbers are scammers!

  13. I have a similar leak! I will try this…thanks on the very awesome detailed video!

  14. I'm sure someone has probably already said this but just in case they didn't you might want to put new Teflon tape on that expansion tank because you went in the wrong direction, otherwise a great video 👌

  15. Can anybody tell me ?
    How to repair very hot running steam line leakage in industrial boilers without stopping bolier or steam.

  16. Wrong wrong wrong. Relief valves should always be installed with the stem pointing up. If there was 30# pressure on the boiler the relief was not faulty just doing it's job.the culprit was only the x tank. And learn how to use the Teflon tape.

  17. good video, done these repairs couple times already, every men should learn and able to do simple DIY. it is actually fun, not a rocket science.

  18. You sound Jewy as hell. Lol

  19. That plumber atleast knows how to put thread tape on the right way there weekend warrior.

  20. So much was done wrong in this video in terms of safety, building code, and practicality.  There is this do it yourself society that demeans actual professionals and the costs involved with getting one to your home.  Words in the comments like thieves and crocks are very untrue and unfair in most cases.  Did anyone ever tell you that the orientation of that emergency relief valve was piped wrong?  Theres some knowledge that could save your life.  Is there any value in that?  Turning wrenches is cheap the knowledge to know how and why to turn the wrenches is where the costs is involved.

  21. Should you close off the valves that lead to the upstairs heaters so the water wont drain back down as you empty the boiler?

  22. Pizza sounds good right now!

  23. Lol he went the wrong way on the tape.

  24. Any pressure vessel should not be worked on by anyone who is not a trained professional, your house can blow up. Also very important is the fact that you are not paying a professional for just changing out parts willy nilly and then hoping for the best, you are paying for his years of "Professional" experience which could save you and your familiy's life by not blowing up your house and by possibly catching a potential safety issue like a monoxide leak. Here are some issues with this video, Relief valve drop against code, no idea on what is the correct size of expansion tank needed total sq ft of radiation unknown, total gallons of system unknown, what caused the over pressure that damaged your original tank? not knowing this may damage the new tank and relief valve again, this is where knowing the specs of the system could insure proper sizing. Lastly you introduced massive air into the system by improperly filling system, your pressure readings are now a combination of water and air in the system which is very inefficient, boiler will run longer and hotter costing more to run. I could go on and on all night but will close on a positive note, you did right by not paying whoever it was who wanted to charge you over a thousand dollars for this repair, their are rip off artist in every industry and for that I'm sorry but there are honest professionals out there who love their work and operate their businesses with a high level of integrity. I'm certain if you would have done what every homeowner should do and get several quotes, do a background check, go through Angie's list etc etc you could have located someone who would've done a great job for less than half of the other guys quote. Now for a quote from a renowned unknown philosopher "In this life you will always get what you pay for"

  25. Thanks. Relief valve and expansion tank were screw-off/screw-on easy fixes once I knew how to drain the boiler. However, my pressure is high and, from what I'm told, this could happen again?

  26. Great video I'm just not very well equipped to do this kind of work myself

  27. I just came across this video. During annual maintenance the plumber said my 20 years old boiler is old, he suggest to replace the "pressure safety system, boiler fast fill back flow combo, safety relief valve, safety pressure tank and Air vent" he is asking for $1600. I know those material is not expensive. This video shows changing the relief valve and expansion tank is not hard, replacing the Air vent took 2 minutes (by a different plumber) , why they charge $1600 ?

  28. I called a plumber and he told me that forced hot water systems need to have the entire system drained to do this job, which is a big job. Did you drain all of the waters out of the entire heating system?

  29. I have the same problem at my furnace, so my plumber changed the valve and expansion tank but it was still leaking and keeping the pressure high. So he thought the valve was defective and he changed it again but same issue. After one day it start dripping again. Any suggestion?

  30. We had our power go out for 3 days. After the power came on, i noticed water coming in under my newly installed pergo floor and it was coming from a the drain pipe under the back flow valve. I panicked a bit but saw the switch and flipped to off and called a plumber to see what was wrong. $125 to show and tell me that three things need to be done, the backflow, bleed system obviously and another doohickey that he told me was very hot to the touch. $1800 my quote. I told him I'll need to get a second opinion, and he says he could "try" something like bleed and replace just the backflow for $900. I declined and said I would get a second opinion. Paid my $125. The system is practically new, only a about 3-4 years old and looks like it was installed yesterday when we bought the house. I'm suspicious. I'm thinking maybe doing the same, replace the back flow valve, bleed and the expansion tank. I don't know how to bleed the system? Mine is gas powered. Any ideas?

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