Hi Mr. Dave! Thank you for your very thoughtful and thorough explanation about the expansion tank on hot water heating system 🙂 Remember Dave, that God loves you and wants you to love Him too - with your whole heart! Thanks, again, Dave.
that device on main pipe next where half inch line connects to the right is an air Seperator for system so it would remove air in circulating water it should have an automatic vent on top to let the air out. you could get some air up in some upstairs pipe if you don't have automatic vents so you should check one of the highest radiators manual vents to see if any air comes out once in a while.
*MAKE SURE YOU HAVE A STRANGER STRAP TO HOLD UP THE WEIGHT OF THE EXPANSION TANK. THEY GET VERY, VERY HEAVY. EXAMPLE, A GALLON OF WATER WEIGHS 8 POUNDS AND THE TANK HOLDS 4 GALLONS, PLUS WEIGHT OF THE TANK.* *ABOUT 40 POUNDS CAN BE HANGING ON THOSE PIPES!!*
*ALSO, THE BLADDER IN THESE TANKS BREAK AND LEAK. IF YOU SEE RUST AROUND THE JOINT OF THE TANK, YOUR BLADDER AND TANK ARE LEAKING AND MOST LIKELY COMPLETELY FILLED WITH WATER* VERY HEAVY TO REMOVE, HOLD ON TIGHT WHEN UNSCREWING, 40 POUND DROP
if your system has automatic vents the air that leaks from tank will just get bled from system as it collects at high points usually the best test is to see if pressure on the boiler gauge goes up a lot as boiler heats up from cold to full temperature it will go from what the autofill filled it to 12 or 15 psi and climb as boiler heats up till it goes over 30 and releases pressure out that side pipe on the pressure relief valve which should run down to within 6 inches of floor. sometimes your system pressure can be too high because the auto fill valve has dirt in it or is worn out and whole system will climb up steadily till it blows relief valve. you can put a tire pressure gauge on the air valve and see if you have around 12 to 15 psi and newest tanks have a water has gotten to the cap feature where it changes color when diaphragm ruptures. it would tell you in little instructions attached to valve when bought.
*QUESTION: IF EXPANSION TANK IS GETTING FILLED --BEFORE FAILURE, CAN YOU REMOVE THE TANK, TURN IT UPSIDE DOWN, DRAIN THE WATER, REPRESSURIZE BLADDER TO CORRECT PRESSURE, THEN REINSTALL??*
*USE A NORMAL TIRE GAUGE ON BOTTOM OF EXPANSION TANK TO CHECK THE PRESSURE. SIMPLY PUSHING IN VALVE TO HEAR AIR TELLS YOU NOTHING. PLUSE IF YOU REPRESSURIZE YOU NEED TO KNOW HOW MUCH PRESSURE YOU PUMPED IN. USE THE TIRE GAUGE*
they are normally inflated to 12 to 15 psi to match what the boiler system pressure runs at the automatic fill valve will say on it what it is supposed to fill to but sometimes they malfunction and put in to much water also.
Update, expansion tank did the trick, no more dripping from the relief valve! Did the "ring" test and it sounded the same throughout, and then the shrader valve let water out so that confirmed it. Really took some doing to get it loose, with a big channel lock and a crescent wrench, but once I cracked it came right off, but make sure you're ready for the weight!
the tank might come pressurized to 12 psi. just test with an ordinary bicycle or auto tire pressure test gauge. It is filled with ordinary air, NOT hydrogen.
Hi Mr. Dave! Thank you for your very thoughtful and thorough explanation about the expansion tank on hot water heating system 🙂
Remember Dave, that God loves you and wants you to love Him too - with your whole heart!
Thanks, again, Dave.
that device on main pipe next where half inch line connects to the right is an air Seperator for system so it would remove air in circulating water it should have an automatic vent on top to let the air out. you could get some air up in some upstairs pipe if you don't have automatic vents so you should check one of the highest radiators manual vents to see if any air comes out once in a while.
Great explanation Sir !
Wish I watched your video sooner
Thank you for sharing 🙏 i am experimenting the same problem and will try to change the tank
Changed the tank and it fixed the problem. Thank you
*MAKE SURE YOU HAVE A STRANGER STRAP TO HOLD UP THE WEIGHT OF THE EXPANSION TANK. THEY GET VERY, VERY HEAVY. EXAMPLE, A GALLON OF WATER WEIGHS 8 POUNDS AND THE TANK HOLDS 4 GALLONS, PLUS WEIGHT OF THE TANK.*
*ABOUT 40 POUNDS CAN BE HANGING ON THOSE PIPES!!*
*ALSO, THE BLADDER IN THESE TANKS BREAK AND LEAK. IF YOU SEE RUST AROUND THE JOINT OF THE TANK, YOUR BLADDER AND TANK ARE LEAKING AND MOST LIKELY COMPLETELY FILLED WITH WATER* VERY HEAVY TO REMOVE, HOLD ON TIGHT WHEN UNSCREWING, 40 POUND DROP
if your system has automatic vents the air that leaks from tank will just get bled from system as it collects at high points usually the best test is to see if pressure on the boiler gauge goes up a lot as boiler heats up from cold to full temperature it will go from what the autofill filled it to 12 or 15 psi and climb as boiler heats up till it goes over 30 and releases pressure out that side pipe on the pressure relief valve which should run down to within 6 inches of floor.
sometimes your system pressure can be too high because the auto fill valve has dirt in it or is worn out and whole system will climb up steadily till it blows relief valve.
you can put a tire pressure gauge on the air valve and see if you have around 12 to 15 psi and newest tanks have a water has gotten to the cap feature where it changes color when diaphragm ruptures. it would tell you in little instructions attached to valve when bought.
Thanks for the explanation
*QUESTION: IF EXPANSION TANK IS GETTING FILLED --BEFORE FAILURE, CAN YOU REMOVE THE TANK, TURN IT UPSIDE DOWN, DRAIN THE WATER, REPRESSURIZE BLADDER TO CORRECT PRESSURE, THEN REINSTALL??*
No, if you can drain water from it then that is the proof that the bladder inside ruptured. That expansion tank would need replacement.
Nicely done 👍
*USE A NORMAL TIRE GAUGE ON BOTTOM OF EXPANSION TANK TO CHECK THE PRESSURE. SIMPLY PUSHING IN VALVE TO HEAR AIR TELLS YOU NOTHING. PLUSE IF YOU REPRESSURIZE YOU NEED TO KNOW HOW MUCH PRESSURE YOU PUMPED IN. USE THE TIRE GAUGE*
Great explanation❤
What air pressure should you
re-inflate the bladder in the expansion tank to?
Just saw a video that stated to inflate it to whatever your supply side pressure is, that's what I'm going to try on mine.
they are normally inflated to 12 to 15 psi to match what the boiler system pressure runs at the automatic fill valve will say on it what it is supposed to fill to but sometimes they malfunction and put in to much water also.
Thanks, I've been having a similar issue to your daughter, I'm hoping it's the expansion tank. It's about 10 years old.
Update, expansion tank did the trick, no more dripping from the relief valve! Did the "ring" test and it sounded the same throughout, and then the shrader valve let water out so that confirmed it. Really took some doing to get it loose, with a big channel lock and a crescent wrench, but once I cracked it came right off, but make sure you're ready for the weight!
It’s pre charged with hydrogen at 12 psgi, don’t fill it with air
Homeowners should never touch their own boilers they make everything a nightmare for us but we do make more money when they do fuck with it.
thanks, i was wondering
the tank might come pressurized to 12 psi. just test with an ordinary bicycle or auto tire pressure test gauge. It is filled with ordinary air, NOT hydrogen.