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How do I turn a hot fixture to a cold fixture?

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Look at the piping to each fixture. If they are flexible lines you can easily swap them after turning off the water supply. The fixtures themselves are the same so that is not a problem. You can choose to make the swap at the shut-off valves or at the fixture which ever is most convenient. If the lines are the solid copper type you can bend them around to do the job if they are not to short. If line length is a problem I recommend replacing one or both with the flexible type from Home depot or wherever. The type that looks like braided stainless steel is best. Rubber hoses will end up making your water taste funny.

Posted on Nov 30, 2014

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Posted on Jan 02, 2017

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Black slim in hot water


SOUND LIKE YOU NEED TO DRAIN AND FLUSH YOUR WATER HEATER TANK. THERE IS A HOSE BIB AT THE BOTTOM OF THE TANK. RUN A HOSE FROM IT TO A DRAIN OR OUTSIDE. SHUT OFF THE COLD WATER INLET VALVE AND OPEN THE HOSE BIB. OPEN HOT FIXTURES IN THE HOUSE.CHECK THE DRAINING WATER FOR CLARITY. IF CLEAR OPEN THE INLET VALVE AND LET IT FLUSH(YOU MAY GET MORE DISCOLORED WATER, RUN UNTIL CLEAR). SHUT HOT WATER FIXTURES, CLOSE THE HOSE BIB AND LET TANK REFILL.

Mar 30, 2013 | Water Heaters

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Our little gourmet dual hot/cold faucet has just started to gurgle out hot steaming water all day without use. The complete faucet is burning hot. Unit is 4 years old and used frequently.


having hot water trickle out all day will make the whole unit hot,, to the touch,, what you need to do , is turn off both the water supplys under the sink,, then remove the handle by removing the hold down screw,, after that , remove the hot water valve,, Just remove the nut that's on the outside of the fixture, what your going to find is at the end of that valve, is a washer,, made of hard rubber,, that needs replacing,, but also, inside of the fixture is a washer seat, its either brass or stainless steel,, that takes a seat tool wrench to remove that ,, but to make sure its repaired completely, both the washer and seat need to be replaced, seat tools are pretty inexpensive at Lowes , or Home depot,, and thats where you can get the parts you need also,, be sure and compare the old parts with the new, so take them with you when you go, most hardware stores that have plumbing supplies will have what you need, the seat just unscrews , but they can be a little tough,, if you decide to get a seat tool, they have straight ones and 90 degree ones ,, the straight ones you'll need a wrench to assist turning in the removal and install,

Aug 26, 2011 | Mountain Plumbing Products Little Gourmet...

1 Answer

Low pressure at hot water tap


Most tankless heaters will normally restrict the hot water output in order to maintain a stable outlet temperature; however, this should only be noticed if you have several hot water fixtures open. If you are only seeing the problem when running a single fixture, then the problem is probably one of these items:

1) clogged aerator on your fixture - easily fixed by removing and cleaning the aerator with a pair of vice grips

2) clogged inlet filter for your tankless - the inlet filter is located on the incoming cold water connection. It has a black cylindrical cap. To remove it, make sure to first turn off your water to the heater and then unscrew the cap to remove the filter. Instructions can also be found in your owner's guide.

Oct 12, 2010 | Noritz Residential Heaters Tankless Water...

1 Answer

I am trying to find out why the cold water line leading out of the WH unit is sometimes hot but no hot water coming out of the cold water faucets in the house and sometimes there is no Hot water in half...


Believe it or not one of the sink or shower fixtures is by-passing when closed.Gravity circulation in standby mode(not being used) is the cause.Trace the (warm )cold water pipe to the fixture after no one uses the water for a while.Good luck.

Sep 23, 2010 | Rheem 81VP6S/430126 Water Heater

1 Answer

Shower water either too hot or too cold can't adjust to suitable temperature in summer.


Turn your water heater down. There is knob on it that controls temperature. Only turn it little bit at a time until you are comfortable with the temperature at fixtures.

Mar 18, 2010 | Bosch Water Heaters

1 Answer

I HAVE HOT (WARM) WATER IN COLD LINES, ESP., THE TOILET 1ST FLOOR, also, I never get very hot water.


Hello,You have a bad faucet/fixture somewhere in the house.The water is by-passing thru gravity to heat up the cold water pipes&toilet when not in use.

Jan 20, 2010 | Grundfos Comfort Series Replacement Valve

2 Answers

Bosch AquaStar 125b ng suddenly goes cold during shower


Does it happen to any other fixture? If not, it's most likely your shower valve and not heater.

Sep 01, 2009 | Bosch AquaStar 2400ES-NG

2 Answers

We have a customer that has a 751od who says at times thier water gets cold for a few seconds. No error codes on the remote. They claim it does it at different fixtures. Everything checks out from water...


A few things you should check:

1. Cross Connections - this occurs when cold water leaks into the hot water system through a fixture. In order to check for a cross connection: 1) turn off the cold water to the tankless 2) open up hot water fixtures in the home. The water should shut off at all hot water fixtures; if there is a continuous flow of cold water, then you have a cross connection. The most common place to find a cross connection is on old shower cartridges.

2. Ask the customer to check to see if the burner indicator is continuously lit during operation.

3. When the water goes cold at one fixture, try another near by fixture to confirm it is also cold there. If its hot at one fixture but not the other, then you have some issue with you plumbing. Tankless heaters can't pick and choose which fixtures to deliver hot water to.

4. Tankless water heaters all have a minimum flow rate that must be maintained in order to continually fire (.5 gpm for Noritz). Ensure their hot water fixtures flow at least this amount, or that the customer isn't mixing too little hot water at their fixture.

5. If they see the cold spurt during initial firing, they may be experiencing a cold water sandwich. When the heater moves from a standing state to a firing state it takes a short period to ignite and heat water. During this time it will be passing cold water through the system. Usually this cold water mixes with hot water in the line as it travels through the plumbing system, but if their fixture is very close to the heater, there won't be enough time to mix.

6. If debris has gotten into the flow sensor, this can prevent the unit from registering flow and cause intermittent firing.

Aug 27, 2009 | Noritz 7.1 Gpm Natural Ng Gas Tankless Hot...

2 Answers

New Noritz 751M-OD not getting up to temp.


check the thermostat this would be the only thing keeping it from getting to any temp,, other then the gas valve, is it constant or happens here and there;;;

Jun 03, 2009 | Water Heaters

1 Answer

Grundfos recirculating retro fit hot water out of the cold side


they have it installed wrong it is pulling from the wrong side, it is supposed to pull ot water up to the fixture but then if it stays hot on the cold side they are backwards

May 27, 2009 | Grundfos RCP-96 Recirculation Pump for...

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