Question about RTO Genova Water Hammer Muffler Plumbing Universal Pipes

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We put in a pressure reducing valve recently, is it necessary to also put in an expansion tank?

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I would recommend you install a small tank on the cold water inlet to water heater. You don't need one any larger than two gallon to take care of pressure variations when water heater is on. To answer your question I would say no it is not necessary but I think it's a good idea. Thank you

Posted on May 24, 2011

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Posted on Jan 02, 2017

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Can you adjust the pressure setting on a Davey Torrium T45 pump to reduce the power of water when taps are turned on?


No. The pressure can only be adjusted at the expansion tank and pressure switch. Keep in mind that your tank pressure needs to be 2 lbs lower than your cut-in pressure. The pressure in your tank can be bled off at the schrader valve(tire valve) at the top of the tank. You MUST adjust both the tank AND the press switch.

Feb 25, 2017 | Plumbing

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Expansion Water Tank Boiler Expansion Tank


d186d4f.jpgWhen water is heated the water will increase in volume. The thermal expansion tank in a boiler heating system is there to allow the extra volume of water some place to go. It also holds enough water to fill the void back up when the water cools.

The water expansion tank is a necessary item in heating systems. It also can cause problems if they do not work correctly. Some of the problems caused by a faulty expansion tank are:

  1. The boiler relief valve will be constantly dripping or blowing off if the tank is totally full of water and does not have the air cushion needed to counteract the increased volume of water as it is heated.
  2. Air can be introduced into the system if the tank does not hold sufficient volume of water to keep the system full as it cools.
  3. If fresh water is introduced into the system frequently the tank will rot out from the inside out.

One of the main things to remember is that a faulty boiler expansion tank can make other things like the relief valve look faulty when it reality it is not the problem. A bad expansion water tank or a bad pressure reducing valve can make the relief valve look bad. Or actually cause it to need replacement. Check everything out carefully before deciding what pieces need to be replaced. If go about just changing parts without a through investigation first you may be changing parts for a long time till you find the right one.
http://www.fixya.com/support/r3705970-heating_circulating_water_pump_problems

http://www.fixya.com/support/r3695967-valve_pressure_reducing_or_pressure

on Dec 23, 2009 | Heating & Cooling

Tip

Boiler Leaking Water - The Boiler Leak may not be the boiler


Went on one call today and had another query by Facebook about this so I though why not write an article about it. Both persons were very concerned as they saw water dripping from theirs boilers. A closer inspection for both showed that it had nothing to do with the boiler its self.

There are many things that can make water leak from your boiler. If you know for sure that the water is coming from a hole in the sections then you may have a serious problem. Usually though there is an easy fix for that also, more on that in another article. Both boilers today were leaking water from the relief valve.254c728.jpg

This valve is design to relieve the excess pressure from the boiler in case of a build up of extra pressure in the boiler. The extra pressure can come from a number of different things. A few of the causes may be a bad expansion tank, a bad fill valve or pressure reducing valve, or an open bypass valve. The bypass is easy, just close it and relieve the extra pressure. The others are not as easy.

Your expansion tank is simply a tank that allows water from the system to go in and out according to the pressure in the system.610ab3c.jpg This tank contains about ½ air which acts as a cushion to absorb the extra volume of water that is created as the water is heated. Hotter water takes up more space or volume, so it needs a place to go to when it is heated. If the expansion tank is totally full of water then, it will push water out of the relief valve. Changing your expansion tank will fix the problem.

If the reducing valve or fill valve is leaking by then you can also get extra pressure in the system.8e5ccb4.jpg A normal heating system will only run 10-20 psi pressure. Most well systems or city water is way higher than that. If the pressure in your boiler gets over 30 psi then it will begin to relieve the extra pressure by dripping water.

If you have a drip from your boiler this is what you check. First the expansion tank, the reducing valve, and the bypass valve that bypasses the fill valve. This valve is usually installed to quick fill the system, or purge the water lines of air.

Often there is just a small problem that looks like a big problem. Do not get excited and methodically check through the possibilities. You will usually find that the problem is not nearly as bad as you first thought that it was.

on Dec 06, 2009 | Heating & Cooling

1 Answer

Hi the pressure in boiler is very high and dripping out side its not the water valve intake been told its the heater exchanger


There should be a water pressure reducing valve in the make up water line. This valve or regulator should keep the boiler pressure at about 10- 12 pounds. It sounds like that valve is letting more pressure to the boiler than it should. There is also an expansion tank that works to keep the boiler pressure at 10 pounds. The rubber seal inside can go bad and the tank will fill with water.

Feb 27, 2015 | Water Water Heaters

2 Answers

Cant find the valve to let air pressure from my radiator for my water to flow right


FILL COOLANT SYSTEM UP BY POURING COOLANT IN THE EXPANSION TANK UNTIL COOLANT LEVEL STOP DROPPING IN THE EXPANSION.WHEN YOU POUR COOLANT IN EXPANSION TANK AIR BLEED OFF THROUGH THE SMALL COOLANT LINES GOING TO EXPANSION TANK.WITH PRESSURE CAP OFF RADIATOR COOLANT LEVEL IN EXPANSION IS AT FULL COLD MARK.WHAT YOU TO DO CRANK ENGINE UP LET IDLE WARM UP UNTIL COOLANT DROPS IN EXPANSION TANK KEEP ADDING COOLANT UNTIL STOP DROPPING STAY AT FULL COLD MARK.WHEN COOLANT LEVEL START RISING IN EXPANSION TANK.PUT PRESSURE CAP BACK ON RADIATOR.WHILE ENGINE IDLING WATCH TEMPERATURE GAUGE.IF START CLIMBING TURN OFF ENGINE LET IT SIT FOR LITTLE WHILE TAKE A LARGE RAG OPEN RADIATOR PRESSURE CAP A LITTLE AT A TIME TO KEEP FROM GETTING SCALDING TO RELEASE AIR IN COOLANT SYSTEM.WHEN PRESSURE IS RELEASED OPEN PRESSURE CAP ADD MORE COOLANT IN THE EXPANSION TANK.CRANK ENGINE AGAIN LET IDLE WHEN TEMPERATURE GAUGE START CLIMBING. TURN OFF ENGINE WAIT FOR WHILE BEFORE OPEN RADIATOR PRESSURE CAP.WHEN YOUR THERMOSTAT OPENS WHEN TOP RADIATOR HOSE IS HOT AND ENGINE COOLANT TEMPERATURE GAUGE STOP CLIMBING AND COOLANT LEVEL STOP DROPPING IN THE EXPANSION TANK.ALL AIR IS EXPELLED FROM COOLANT SYSTEM TO KEEP ENGINE FROM OVERHEATING.

Jun 10, 2011 | 2001 Cadillac DeVille

1 Answer

My pressure valve keeps popping open. I have replaced both elements & stats, and now on the 2nd pressure relief valve..what else could be wrong?


1) Buy pressure gauge.
Put gauge on drain valve.
Anything over 80psi will damage tank.
http://waterheatertimer.org/9-ways-to-save-with-water-heater.html#pressure
If drain valve is clogged:
http://waterheatertimer.org/Water-heater-will-not-drain.html

geno_3245_247.jpg

2) Buy pressure reducing valve
http://www.amazon.com/Watts-0007752-Water-Pressure-Reducing/dp/B002PWPPZ6

3) Turn down temperature on thermostats

4) Add expansion tank on incoming cold water line.
Has to be on cold water line.
Buy at Home Depot or plumbing supply.
About the size of small football.
geno_3245_248.jpg

5) Add a comment for more free help.
Also take advantage of fixya phone service.
For a price, expert speaks with you over phone while you work on water heater or any do-it-yourself project.
Fixya is always less expensive than a service call.

Jan 15, 2011 | Reliance & 50gal Electric Water Heater

1 Answer

I have installed a new water heater aruond two months ago. The problem is that the T&P valve keeps going off even with an expansion tank put on the water system. The water supplier has a built in check...


Expansion tank is supposed to stop over-expansion due to pressure.
The check valve will stop over-expansion from pushing pressure back into the supply line.
The real question is what is causing the pressure.
If your TP valve is bad that could cause problem.
If the thermostat is set very high, and there is frequent short-term use of hot water, that can cause heat to build up inside tank.
Solution:
Lift TP valve and let out pressure to see if there is something lodged in the valve.
Be careful of the scalding water.
Let the TP lever down slowly.
Next step would be replace TP valve.
Turn down thermostat to 120, or set to 130-5 if objective is to kill most bacteria.
Last. You might check that your expansion tank is correct for water heater.

Oct 31, 2010 | Rheem 81VP6S/430126 Water Heater

1 Answer

Hot water coming out popoff vavle put new one on still does same.


If you have public water, it may have a check valve on it. Many municipalities have done so. If so, when the water heats, the associated expansion will push water out of the temperature/pressure relief valve. The solution is to install an expansion tank. You'll need to know your water pressure and water heater tank size. To check the pressure, get a gauge that attaches to the garden hose outlet and turn it on. That pressure reading will determine what you have to set the pressure in the expansion tank to. Good luck.

Mar 07, 2010 | Electrical Supplies

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