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Diahragm pressure tank is full of water

SD-AT2

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Sounds like diaphragm has failed not a lot you can do but replace

Posted on Jan 08, 2013

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6ya6ya
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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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I have a ideal mini c28 which is loosing pressure when the boiler is off, but when topped up and heating turned back on the pressure keeps rising


According to the laws of physics, pressure will rise as temperature increases and falls as temperature decreases in a closed system. The issue is how much does the pressure change for a given temperature change. The more air in the system, the less the pressure change, and vice versa. Vent your registers (pump must be off). If they are noisy from water flow, vent again. Let the boiler come up to temperature and shut itself off. Check the pressure at this point. If it is less than about 15 psi, add water to get it to 15 psi. If it is over 15psi, vent the surge tank to get to 15 psi. If your surge tank is totally full of water, you will have to find a way of getting air into it. Always check your pressure at the same water temperature to really know if you are losing water from the system.

Oct 17, 2014 | Water Heaters

1 Answer

My boiler has a squeeling sound during the warmu up. I think it is coming from the expansion tank?


The squealing sound generally comes from a circulator pump, if it has a drive coupling between motor and impeller housing there is an oil cup/or oil hole, add oil until it is full! If it is a cartridge style circulator you may have to replace it.

Sometimes air in a system will cause this squeal noise as well. Purging the air out of system may be required. If you need to know how to purge a system there is a good pdf file at this link for $8.95 The Basics of Purging Air
From your Forced Hot Water System
&
Troubleshooting A Leaking Boiler
Relief Valve
Miller Furnace Books Repair

The Expansion tank is factory set to 12 psi and the only way to tell if it remains with 12 psi is to drop the system pressure to zero and check the tank with a pressure gauge. If water comes out the air valvestem when you apply the pressure gauge, the tank is bad, replace it! If there is less then 12 psi on the tank add air to 12 psi and open water valves back up to normal operating pressure. Usually the feed valve will automatically stop at the preset setting.If the boiler is leaking water out any relieve valve drains, the feed valve, relief valve and or expansion tank may need to be replaced.

Oct 09, 2014 | Amtrol EX-30 Diaphragm Expansion Tank...

1 Answer

How to top up the pressure on the boiler


According to the laws of physics, pressure will rise as temperature increases and falls as temperature decreases in a closed system. The issue is how much does the pressure change for a given temperature change. The more air in the system, the less the pressure change, and vice versa. Vent your registers (pump must be off). If they are noisy from water flow, vent again. Let the boiler come up to temperature and shut itself off. Check the pressure at this point. If it is less than about 15 psi, add water to get it to 15 psi. If it is over 15psi, vent the surge tank to get to 15 psi. If your surge tank is totally full of water, you will have to find a way of getting air into it. Always check your pressure at the same water temperature to really know if you are losing water from the system.

Sep 24, 2014 | Water Heaters

2 Answers

How does a home well water system work?


Deep well.
Pressure valve located on front of above-ground-storage-tank will turn pump on-off depending on amount of water pressure inside tank.
When water is consumed inside home, the pressure valve responds to the lower pressure and closes electrical contacts... sending electricity to water well pump located deep underground.
The pump turns on and lifts water through a pipe into the above ground storage tank.
When the tank is full of water, the pressure valve senses the higher pressure and turns off electricity going to pump
Pump shuts off.
There is a one-way check valve on the water line going down to pump, and this keeps water from flowing back down into well.
The above ground tank maintains water pressure for the house.
When pressure is reduced by taking a shower, the pressure valve turns pump on again, and cycle repeats.

Aug 20, 2014 | Water Heaters

1 Answer

Low water pressure


Hi Bob,

You can determine if the tank is the problem by connecting a garden hose to the drain that is provided on most water heaters. Before doing this, be sure to shut of the electrical supply to the heater - otherwise you can damage heating elements if an electric type or waste fuel by heating an empty tank if a gas / propane fired type.

If you get a slow flow out of this drain, it means that somewhere in the cold water supply side to / in the tank - there is a problem. Inside the tank, the cold water is delivered by a "dip tube" that distributes the cold water to the bottom in the tank. Dip tubes are used in both electric and gas / propane fueled heaters. Here's a cut away view of a typical tank:



6_29_2012_9_57_32_pm.jpg

If the tube is clogged, or there is build up, scale or debris in the supply (cold water) side of the heater, flow rates will suffer. Likewise, if there is a problem with the output of the tank, it will directly affect flow as well.

If you get a good flow rate from the drain, then the issue is going to be on the hot water output side of the heater. Again, the same build up, scale, debris issues on the hot water out put pipe will cause problems with flow. Typcial tanks do not have dip tubes for the hot water side of the tank - as taking hot water from the top of the tank is most desireable and is furthest away from the cold water that rushes in to make up the hot hot water going out.

There's nothing really in the tank itself that can cause issues with flow outside of the dip tube, and piping to and from the tank.

Good luck!

Jun 29, 2012 | Water Heaters

1 Answer

How do i install a pressure tank to my water heater?


Do you mean expansion tank? To relieve pressure?
Expansion tank goes on cold water line before cold enters tank.
See image:
http://waterheatertimer.org/images/water-heater-expansion-tank.jpg

Expansion tanks are installed when TP valve is constantly drizzling hot water due to very hot temperature settings. Or when water pressure is high, etc
It's also smart to install expansion tank so plumbing lasts longer, and older tank is less likely to rupture and cause damage. Inspect tank for leaks each 6 months.
Some regions require expansion tank by local code.
Water heater can be damaged when pressure exceeds 80psi. : Test pressure using pressure gauge at water heater drain valve.

Other resources:
http://waterheatertimer.org/9-ways-to-save-with-water-heater.html
http://waterheatertimer.org/How-to-adjust-temperature-on-water-heater.html
http://waterheatertimer.org/images/BTG-100-Pressure-gauge.jpg

Sep 27, 2011 | General Electric Water Heaters

1 Answer

I fill the tank up, but it seems too light to be full, so I drain it and it only has about 1 gallon if that in it. Whats wrong?


How are you filling the tank, and is this in an RV or what? Open pressure relief valve when filling and when water comes out pressure relief valve, you know your close to full. If it doesn't come out there when valve is open, check for by-pass valve(s) in wrong position and not filling the tank.

Aug 11, 2011 | RTO Atwood Water Heater - 6 Gal LP

1 Answer

My Atwood 6 gal. water heaters pressure relief valve starts dripping shortly after (8 or 10 min.) heat is called for, and dripping gets stronger until a full flow. I have checked all four hi-limits and...


If the water seems hotter than normal, then a faulty thermostat would be a good bet.
If water doesn't seem any hotter than normal, then check incoming water pressure.
usually 2 things cause that, too much pressure coming in, or thermostat faulty and not cutting out when normal temperature reached, thus higher temperature, and pressure. If both them check out, replace valve.

Oct 30, 2010 | RTO Atwood DSI-RV Water Heater-6 Gallon

1 Answer

I am loosing water pressure in my shower so I checked pressure at my ST-12 Therm-X-Trol tank hoping it would be 40 but water comes out of the test point and if you tap the tank it feels like it is full of...


you are correct....the rubber bladder inside the tank has leaked by and filled the expansion tank. it will need to be replaced and you also may find boiler or water heater relief valves may blow off until its replaced

Oct 21, 2010 | Amtrol ST-5-C THERM-X-TROL ASME Expansion...

1 Answer

Toto toilet: refill valve opens and closes rapidly


I believe you have a high water pressure going to the
tank. Minimize the water volume going to your tank. This is done by fully closing the inlet valve under the tank. Then open about 1/4 to 1/3 of the inlet valve. To do this, count the number of turns to get it full close from full open position. For 1/4, divide the number of turns by 4 and divide it by 3, for 1/3 open. Hope this will solve your problem.

Nov 26, 2009 | Water Heaters

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