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Water pressure has decreased and now heater only works once in a while

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The unit is clogged with mineral buildup. You will need to pump an appliance cleaner or just vinegar through the unit for around 20 the 30 minutes to remove the buildup. Contact Bosch for replacement washers, you need them to reassemble the unit.

Posted on Sep 08, 2010

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Posted on Jan 02, 2017

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What are the pros of Marey Power Gas Tank less Water Heater?


The pros of the Marey Power Gas Tank less Water Heater are as follows:
1. Available in propane and natural gas
2. DIY installation process optional
3. Very reasonably priced Does not use electricity but does require a 2 D-Cell battery
4. Only uses gas, when water is turned on (decreases natural gas wastes)
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How do I decrease the pressure on an heat line monza 24 boiler


There will be a pressure release inside the boiler cabinet......but the easiest way would be to bleed the radiators till the pressure is at the right level!

Oct 24, 2014 | Water Heaters

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Need to decrease pressure on a heatline plus 24 vizo? any ideas? also leaking small amount of water under boiler!


There is a pressure adjustment on the gas valve...make sure you set it with a manometer. If the water is just condensate, its ok except if you don't have enough combustion air for the btu rating of the water heater. If it is a leak, replace the water heater

Dec 11, 2013 | Water Heaters

1 Answer

Water pressure decreases as the water runs


Probably a clog in galvanized pipe.
Expansion tank is not whole-house pressure regulating tank. It is localized protection for plumbing exposed to high pressure caused by very hot water.
If you house has pressure regulating valve, then that can be a cause.
For low water pressure in household, the following link might help:
http://waterheatertimer.org/Low-hot-water-pressure.html

Aug 07, 2011 | Amtrol ST-12-C THERM-X-TROL ASME Expansion...

1 Answer

The water is luke warm and the pressure is lower than ususal.


We probably need more information to give a good answer.
You report 2 different problems occurring at once: Low pressure and Low temperature.
If this is tankless water heater, then Low pressure and Low temperature might be related, and you probably need a service technician to diagnose and repair cause.

If this is tank-type water heater, look at label on side of tank for type and brand of heater.
Is it gas or electric water heater? Troubleshooting is totally different for each.

Is water pressure pressure low on just the hot side faucet, or is cold side faucet affected too?
Are all hot faucets affected by low pressure?
If you have a dual handle faucet, open hot side only and check if hot water that comes out is hot as normal.
This will say if problem is pressure or temperature.
Tank-type water heater usually won't have both these problems occur at one time, but water heaters work in funny ways sometimes.

Add a comment to this post, or re-post your question with details so the experts can give a solid answer and not guess.
Also you can post water heater questions on pro water heater forum:
http://www.thetankatwaterheaterrescue.com/forums/forum3/

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.

Feb 05, 2011 | Water Heaters

1 Answer

Hot water tank does not work when shower is on, it does however work when the faucet in bathroom is on. It quit working in the shower about a month ago.


  1. COLD MIX, HEATER DEACTIVATES
    If inlet water temperature is over 70°F due to geographic location, water maybe very hot out of the tap. This requires a lot of cold water to be added with it in order to attain a useable hot water temperature. The addition of too much cold water will overpower hot water demand from the tankless water heater. This slows the flow within the tankless water heater, decreasing it below activation point, which shuts off the heater. The end result is nothing but cold water coming out of the outlet. See: TWH E2-04 Overcoming fluctuating temperatures [PDF].
  2. FLUCTUATING WATER PRESSURE
    If the water pressure in the home is erratic and the water flow is not consistent while a tap is opened, then the temperature of hot water will fluctuate. The minimum water pressure for the home should be 30psi or greater. For people on well systems the minimum pressure range is 30-50psi. The use of a pressure reducing/regulating valve is an effective way to maintain constant water pressure to the water heater. Watts brand 25AUB- ¾" or N35B-¾" pressure reducing/regulating valves or equivalent is suggested.
  3. CHANGING FLOW RATE
    Major changes in flow rate can adversely affect the output water temperature of the heater. Increases from one major fixture running to multiple fixtures running at one time can cause the temperature to fluctuate. Stay within the heater's specifications. See: TWH E2-03 Outlet temperature vs. flow rate [PDF].
From the Bosch website.

Good Luck,
Gary

Dec 16, 2010 | Bosch PowerStar AE125 AE125 Whole House...

1 Answer

Only a trickle of hot water is coming out of my faucet. I tried to flush the tank, but only a trickle continues to come out of the hose....am I not doing something right?


http://www.waterheaterrescue.com/pages/WHRpages/English/Troubleshooting/Tanklets/backflushing.html
The link above gives a list of reasons for the decreased water pressure at your faucet.

As for draining the tank, it sounds like it's clogged with sediment.
http://waterheatertimer.org/Clean-sediment-out-of-water-heater.html

To open a clogged water heater:
Connect a washing-machine-hose to water heater drain valve.
Connect garden-hose to outdoor spigot, and to washing-machine-hose.
Turn on outdoor spigot for 10 seconds and it will open the clogged valve.
http://waterheatertimer.org/Water-heater-will-not-drain.html

Nov 07, 2010 | Rheem 50 Gallon FVR NATGAS Water Heater...

1 Answer

White flaks in the faucet filter screens resulting in decreased water pressure . clean out screens about every two to three weeks this has been going on for about a year and a half any suggestions


time to flush out the heater. do you have the instructions?
lime and scale build-up will cause this

takes a little time, and requires about 5 gallons of vinegar, and a small pump.

Aug 10, 2010 | Bosch & Tankless LP Hot Water Heater

1 Answer

I have a 40 gal Whirlpool single element 3500 mobile home hot water heater. I have replaced the element thermostat high pressure valve (because it was leaking) & flushed for sediment. In morning I wash...


A 40 gal. electric water heater will give you aprox. 32 gal. of hot water in one setting, since they do not reheat as quickly as gas. So if you are using a newer 1.5 or 2.0 gpm shower head. You could take a 16 minute shower with straight hot water. If you are running 2 new shower heads at once you could get 8 minutes. If you using the tub spout the times decrease. Some of my customers like to turn up the temerature on the thermostat a little so they can mix more cold and get it to last a little longer. Be very careful doing this.
If your water heater has a lot of calcium built up in it the times will decrease.
With out seeing the heater, you mention it is a mobile home heater so I am guessing that it is bottom fed.
I hope this has helped.

May 09, 2010 | Water Heaters

1 Answer

How do I set my water pressure regulator.


On the top of the regulator is a stem/threaded rod with two nuts on it.

Loosen the bottom nut and that will allow you to turn the stem, which adjusts the pressure.

clockwise usually increases pressue, although I have encountered PRV's (Pressure Reducing Valve) that decreases pressure with a clockwise turn.

When A PRV starts malfuntioning, they often cannot be adjusted and need to be replaced or rebuilt.

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