7 years later & your video is still helping people, I have Exactly the same problem you had, so using my phone I'm taking some photos and tomorrow heading to Lowe's or Home Depot, it all looks easy enough, by the way my plumber wanted $1,250. Thank You!

Thank you so much for this video. It showed up in google when I searched for faulty radiant furnace pressure relief valve. I would have only replaced the valve, but after watching this, I replaced the overflow tank, relief valve, and added a new pressure and temp gauge. It all seems simple to replace, but I would have run into so many gotchas if I had not watched this video. It made the repairs painless and a saved me a lot of money. One thing I would add, is to mention tools needed. My furnace was old and I spent half a can of WD-40 on the parts 24 hours before doing the work, and bought some heavy duty plumber wrenches and other wrenches that only set me back about $40. It made removing the old parts much easier.

Thanks for posting this video because I went down to my crawl space and water was on the floor and it was overflowing the Rubbermaid bin I had under the relief valve. I tried opening the valve and water came out of course but it wasn’t the problem. I purchased the valve, relief tank, and a six inch 3/4 threaded pipe for $62 at Lowe’s. My valve was right against my boiler so I extended it. I drained the system and not much came out. Took off the valve and some water came out. I took off the tank and it was heavy like yours. Full of water. Replaced both the valve and tank and turned everything back on and I put a hose on the valve and put the hose into a 30 gallon Rubbermaid bin and all is good. Thank you so much for posting this video. I probably saved a thousand dollars

Thank you man, this video was actually the best video I could find on how to replace the PRV. Lot of master plumbers on youtube but you explain it even better than them. Saved me a few hundred bucks and learned a lot about my boiler at the same time so thanks again.

Thanks so much for sharing this video, That was exactly what my boiler needed. Once I bought the expansion tank and pressure relief valve, I was able to replace the parts in about 15 minutes. Thanks again, may God bless you and your family

Thank you !! This video helped me fix my heating system and get it going again - saved my a lot of money in Plumbers fees !!

Just wanted to say a huge thank you for making this video. Replacing these two parts today fixed my exact issue. I know there are other videos out on KZfaq detailing this same problem but I appreciate yours because it was interested but also very straight to the point. Some of the other videos offering this same fix at almost 30 minutes long. Too long for my taste. Cheers!

Good day and happy New yr so I'm a women and I didn't know to much about burners so a technician came out and when he left my burner was dripping water it's a new burner and there was something running looking at your video gave me confidence to move that pressure valve no more dripping water some people like to try to get over on women that are not knowledgeable thank you Meltona

Just an fyi for anyone attempting to do this repair on their own, code states on a boiler that the relief valve Must be mounted vertically on a boiler. In this video the relief valve is on a nipple coming out the side of the boiler and in the event there is not a tapping on the top of the boiler, a 90 would have to be added to the nipple to mount the relief valve correctly then nipple, 90, and pipe to floor within 6" to prevent anyone from getting hurt in the event of a relief valve blowing off. This was a great video, just wanted to add some clarity. Thanks

I wanted to say thank you i fixed my furnace by watching your video and I was leaking 5 gallons a day out of it ! The relief valve went but changed the expansion tank as well ! Worked great !

You went straight to the problem. Explained problem. Showed how to solve problem. Finished work with out any Corny side tracking Jokes . Thanks

I have to thank you so much DIYeasycrafts!!! My releasing valve kept leaking water for past two weeks. I intended to just replace the valve until I saw the Video. I did exactly what you did on the video. My expansion tank filled with filthy water. If I did not watch your video I would tried only to replace the releasing valve and of course it would not solve the problem. I spend overall less than $60 and got the problem solved! KZfaq provides amazing platform for these amazing people and amazing videos. How would I do the DIY without it?! Thanks again. Please keep the great work!

This is a useful tip video... thanks for posting it. I had to do this several months ago. You may want to add an annotation about charging the dry side of the expansion tank to match the working pressure of the system. My understanding is that it isn't an absolutely necessary step, but a recommended step (I am not a plumber).

I have zero knowledge of water heater system. Their video help me figure out how to reset my pressure relief valve. Thank you thank you 🙏 for helping me out. Great video!!!

The man saved $1000 instead of people commenting about that the professional wanna be so called plumbers that scam people everyday are commenting about how he put the Teflon on backwards, unbelievable.

A simple thank you. Fixed the valve in 2 seconds.

Wind your Teflon tape the same direction as you screw the valve/tank on. You did it reverse. Will seal better that way.

WoW! I simply played with the pressure relief valve tab and THAT DID IT!! THANK YOU$$$$$

thanks! it was exactly what I needed. replaced everything for less than $125. A service call for someone to come out was at least $100 not including parts and replacing the relief valve.

Update: I replaced everything and it seems to be fine. I was waiting on a guy to come since last year and he's actually someone I know. Nice to be able to do it myself! Thanks for the video, it gave me the confidence to do it!

Very informative and should help me in my project. I have a leaking pressure relief valve on a home I just purchased. Thank you very much for taking the time to do this video!

This guy is knowledgeable enough to make this video and give out dangerous information, that water when you're letting it out from the relief valve could be scalding hot and burn you instantly and what happens if the relief valve does not seat back right in your going to have scalding hot water spraying out?. Could also just be the pressure reducing valve and it can also be a coil inside the boiler if it is leaking in putting domestic water into the boiler into the boiler hence having the relief valve leak

Nicely done! Plumbers are ridiculous with this quotes,I always do this repairs myself just like you,safes money,you learn it’s fun 🙏🏻thanks for sharing so other home owners do it themselves

Very good and detailed informative video thanks for saving me money so I could fix it myself

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

Great video... it's unbelievable something so specific like this video exists... but this is EXACTLY this issue I am having and this is the solution. I have a maintenance agreement so someone else may do this, but I feel better when I know what they should be doing. Awesome! Thanks! (So, the repairman came today and this is exactly what he did... he started to explain and I said... "I already know" and we had a good laugh! I told him about the video!)

Verry detailed and clear. You just need to wrap the Teflon clockwise in the thread, so it will tighten when you put together the parts. Kudos!!

Nice, I was able to do this myself for the cost of the valve (about $50). Thanks!

Thank You your video is awesome and it really made my day happy. I have been having a really hard time furnace broke, hot water heater broke, also washer broke, between hot water heater, and washer I have water every where, I'm disabled broken lungs! Limited funds so I'm unable to call perfessionals. Now I know I can take care of this hot water thing myself, and I am so happy. Thank you! Thank you!! Thank You!!!

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

Really great video! Thank you for simplifying and getting right to the point. Learned a lot about my system and definitely saved me some money. Really appreciate this feed.

Noticed that the PRV on our 10 yr. old Pennco has been leaking - and - have noticed water at the top of the Taco air scoop (which sits above the expansion tank). Will replace both. Many Thanks for posting.

Thank you!!!! I really needed to see 1:25!! I didn’t understand what other people meant when they say that I should try to flush it first. I was turning it sideways and nothing was happening.

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 👌

Is it necessary to change the expansion tank when you change the valve? I meant is it compulsory? Thank you!

The easiest way to do so in a pinch is to just to piggy back another relief valve to the existing one. That way you don't have to drain the boiler.

Gotta fill the expansion tank with air to match the pressure of your water in the house. It comes pre-pressurized but only at about 12PSI. other words great video 👍

Awesome video. Thanks…of course today is -11 windchill! You saved the day.

Nicely done..you should do all repair vids..excellent job!

Position monkey wrench with its "nose tips" pointing in desired direction . You had them facing you as you were pushing for removal of valve. Also proper diameter pipe over handle of wrench will increase the leverage and make it easier to remove the valve as it might be too tight due to rust or possible prior over tightening. ( this trick also works for lug wrench use when trying to remove lugs from tire rim. This kind of leverage makes it a whole lot easier ! )

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.

This is a useful tip video... thanks for posting it.

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." ;-)

PSA: Do not play with the relief valve if you do not have a new one ready to go, and you suspect the relief valve might be broken. I lifted it and closed it per 1:13, it would not stop gushing water afterwards since I think there was some blockage that helped it keep the pressure. After the blockage was cleared from opening the valve, the valve won't close properly since it's a faulty valve. Now I'm just sitting at home waiting for the new relief valve to arrive, without heat or hot water. Sigh.

How about tank pressure? Did you charge it to match the water pressure ? Come precharged but not enough.

Skip first 2 threads with tape and add pipe dope. I think your expansion tank should have a thermal trap to keep hot water from the rubber diaphram .

I was struggling to find a real information related to my issue. I was lucky to find this video. Thank you. Keep up the good work!

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

Excellent video, very well explained.

Excellent video, good job

I’m surprised your Teflon tape didn’t unravel as you threaded that tank back on to the boiler, you always wrap your tap clockwise which you did not, to properly refill your boiler with water you need to purge the air out of the system if you don’t you won’t have any heat, open the boiler drain and let it run until all the air bubbles are out of the pipes and the water returning to the boiler is coming back hot, also worth noting is that all expansion tanks have water in them you’ll know your tank is bad if it’s full of water, the bottom of the tank should have air and the top should have water in it, they will go bad and need to be replaced, to find out if your tank is bad tap on it

What a nice set up to actually have sunlight in the boiler room. Everybody I know has their boiler in a dingy basement corner.

You wrapped the teflon tape on the pipe in the wrong direction .It should be wrapped in clock-wise direction on the male threads(with pipe or male fitting in your left hand)this allows the tape to stay on the threads when tightening.

Thank you for sharing! Love it

Great job.........many thanks and easy to follow ,nice one!

1:20 What you want to do is tap on the top of the T&P valve a few times. That'll work much better than to keep flipping the valve open.

Shouldn't you check the pressure of the expansion tank pre and post replacement?

Nice video all meat no fat thanks

Sometimes its the pressure reducing valve thats bad and lets to much water in and pops the expansion tank which causes the relief valve to open and leak out because there is to much water pressure in the system . sometimes there is nothing wrong with the relief valve its just doing its job and is telling you something else is not.

Thank you so much🙂👌💪💯. Just saved me the same$$$

Nice video

Great explanation ever seen good Job, thank you for sharing with us, nice video.

Thank you very much for theis informative video, I'm having this exact problem right now and was kinda nervous about doing it. Now I just have to go get the parts and do what you did! Thanks!

CAUTION: You need to FILL SLOWLY because quickly introducing cold water can possibly cause the BOILER TO CRACK- this is usually on a steam boiler more than hot water boiler because steam units run hotter. Steam is made at 212° and HW is usually set at a max of 190° (more like 170-180°) Hopefully ppl see this WARNING. “Rip off” might not be the best statement but they do charge outrageous rates often and if they truly quoted a thousand bucks that is a rip off!

That’s was very helpful thanks man you save my day

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

Do I need to close the vales coming in from the house side or will they remain full? Thank you. They are in rough shape and I'd like to leave them if possible

awesome video save me a lot of money

While the basis of this video is informative there is a bit more information that is handy. You can determine if the tank is bad. Press the schrader valve on the tank. If you get water the tank needs to be replaced. If not it may just need an air charge, usually to 12 psi without water pressure o the tank. If you get water it will be heavy. You can lighten it before removal by drilling a hole in the bottom of the tank and pre-draining it. Of course the boiler water will have to be turned off and pressure removed from the boiler. This is not a step by step plan. The pressure relief valve must be installed in a vertical position. This means the stem of the valve will be vertical not horizontal. The reasons behind this is 1) it is code and 2) keeps the seat of the valve cleaner and 3) extends the life of the valve.

Wet good tutorial!

Thank you

Does the bladder in the pressure tank come pre-filled to the correct pressure? Shouldn't one confirm its PSI with a tire pressure gauge to ensure proper system pressure?

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?

Thanks

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?

Is that the same Universe located in Seaford, Long Island?

The expansion tank needs air to allow for expansion and contraction of the water from the water heater. Before replacing the tank, check the air pressure using a tire gauge.

Great video, thank you

Can we just empty the expancion tank ??and be reuse? and why is not mounted up sidedown `

You did not check the pressure in the expansion tank. It has a valve on the bottom.

this was such a helpful video!

Plumbers quote was high and this is a best case scenario for a home owner doing himself, many boilers pipes and valves are rusted in and MOST homeowners who attempt this will quickly be in over their heads.

Thanks again for the very good explaining and easy to follow detail! When shutting off the water supply to the boiler, and draining the system, is it necessary to close off the ball valves entering and returning the heating zones? What I mean is, would the water from the entire system upstairs drain (by gravity)? (I have a two story home with four heating zones and a fifth zone to a hot water tank).

Don’t forget to bleed the air out of your boiler as you’re refilling it. Do this using the blow off relief valve you just replaced as it is at the highest point internally in the water jacket of the boiler.

One thing I learned the hard way. Avoid making deals with plumbers under the the table. Most will RIP you off. I had a plumber worked on my boiler. Every week almost the whole winter months my boiler broke down. Each trip he came back with boiler parts from igniter to gas valve to pressure relief valve an boiler would work for 2 days. He kept telling me that my boiler would explode if he does not replace needed parts. My hands were tied cause I could not call the company he work for and had to come up with $300_$400 for parts plus installation to a point where he literally replaced most of the boiler part. When my cost went close to $5000 I called a legitimate company that fitted my old boiler with new expansion tank and never had problems with it anymore.

Question tho , is the pressure valve suppose to be warm to the touch ? Mine I can’t see if water leak es because the pipe is fed back into the wall and don’t know where it goes .

Thanks! Very informative. As is usually the case though with any instructional video, the background music distracts and "muddles" the narration, making it difficult to watch. Will never understand why people do this.

great advice

What about the pressure in the expansion tank after installing it what should it be?

So sometimes when the expansion tank is faulty the pressure relief valve can leak?

Not only plumbers charge too much, but in some cases they simply guess and try to replace parts as much as they can. I am more interested in plumbers who can truly diagnose a problem. Most of the boiler issues can be easily resolved by DIY

What if there's any air pockets??

Very helpful thank you. You really should lose the cheesy music, though, very unnecessary.

Generaly relief valve and expansion tank last for 5 to 7yrs same as go for hotwater tank pressure temp valve.

The plumber who gave you that estimate is a thief. Also you never purged the air out of the zone loops if you start the boiler without doing that correctly and you allow the circulator pump to run dry or air lock you will be replacing that too. You must purge the air out of the loops, not the bottom of the boiler.

So you drained literally every raiders or whatever you have and didn't bleed any air out? I'm confused

I mighty have missed it But I did not hear in this video that although they might look the same a pressure relief valve for a boiler is very different than for a water heater

isnt it normal for the tank has water in it around 1/3 of it near the connection?

The pressure relief valve is supposed to be mounted in the vertical position with the spindle on top.

granted ours did not need replacement, just a simple act of lifting the valve and releasing water saved our basement at 11 PM when we could not possibly contact a plumber. The water was coming out fairly quickly but not blasting like you did into the bucket... fortunately after lifting it a few times, The leak seems to have stopped and hopefully saved us from having to hire a plumber.