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Old 05-01-2006, 10:22 PM   #16
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Low hot water pressure


You can check pressure/flow at washing machine. Turn Hot/cold off, cycle washer, start fill should relieve pressure. Remove hot from back of machine, (carefully most are plastic parts) inspect if screen clogged most washers have them. Put hose in washer tub, hold while you turn just hot back on, see how your pressure and flow are. If low, your back to heater outlet. Most well systems have lime/calcium build up. Older city water can have rust problems. On electrics build up coats heating elements and can become quite hard and thick. Chalk or rust color is the usual, is your green copper statue patina or alge green? Flushing a water heater gets neglected until it complains.

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Old 07-06-2009, 10:56 AM   #17
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Low hot water pressure


Redline- I have the identical problem described in this post with low hot water pressure (Low hot water pressure) and I did the same things that you did (drained the hotwater heater several times, changed the valve on the hot water spigot in the bathroom- none worked and the low hotwater pressure is all over the house). Did you ever get it resolved?? What ended up being the cause of the problem and the eventual fix? I REALLY appreciate your sharing your experience, many thanks!
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Old 07-06-2009, 11:12 AM   #18
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Low hot water pressure


Look for rstriction on the cold water inlet to the w.h. If you have low hot water perssure throughout the house ( if you dont have galvvanized pipes) Low cold water inlet to the w .h would result is low hot water .. Mabe scale build up as the hot water leaves the tank
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Old 07-06-2009, 11:47 AM   #19
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Low hot water pressure


Thanks for the tips. The problem, in my mind, cannot possibly reside in the cold water feed because the cold water pressure in the hous is 2 to 3 times as strong as the hot water (ie: normal/no noticable difference). I've done many of the things listed in this post and none have worked. I beleive that the issue may reside either in the hotwater heater itself (which i did drain to no avail) or in the hot water pipe exiting the heater. Either way, the issue is the same as Redline's original post so I am wondering what he eventually did to fix it.

It not, do you have any other suggestions for me?

Thanks!
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Old 07-06-2009, 12:13 PM   #20
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Low hot water pressure


cold water feeds the w.h . Hot water is forced out the top & out of the w.h by the cold water entering at the top of the w.h.Could possibly be even the dip tube in the cold water inlet of the w.h..
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Old 09-29-2009, 09:33 PM   #21
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Low hot water pressure


I tried the flush method on my water heater and it didnt fix the problem. However when I started to fill it back up I noticed that the water going into the heater seemed to be not flowing properly. I figured that there must be some sort of blockage before or at the cold water entrance to the heater. I took a wrench and hit the water pipes in the general area where the cold water entered the tank and wala! it dislodged whatever was keeping the water from flowing properly. Problem fixed!
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Old 09-30-2009, 10:18 AM   #22
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Low hot water pressure


Well since it sounds like it is a newer water heater...i don't think ti could be it.

What is the water like? is it hard water? do the faucets have any sort of corrosion or buildup on them? I wonder if there could be some restriction due to hard water...like a buildup. Could be a pain in the butt to do, but get a pipe nipple and connect the supply line to the line to the fixtures and see if it does it then. If so it is the water heater...if not, then something is plugged up.

Take a look at the ball valve...can you semi close it and look in there...see if the ball has become cracked...if it is a plastic ball.

Last edited by Viper16; 09-30-2009 at 10:19 AM. Reason: EDIT: You figured it out...grats! :)
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Old 10-03-2009, 12:19 PM   #23
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Low hot water pressure


your anrod is restricted that the hot water exits up and into the copper line to start the run of hot water pipes..OR the copper fitting closest to the HOT OUT on the top of the heater is closing down like an artery with a cloresterol build up in a blood vessel...if it slowly has becoome less and less over the year it is that mineral build up on the copper fitting that is threaded into the steel female hot tank out
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Old 11-07-2009, 05:38 PM   #24
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Low hot water pressure


I had the same problem so I did two things - drain the hot water from the drain water but I think it didn't work. Then I lifter the pressure relief value from the top of the water and I could see hot water coming out at very high pressure. That assured me there is no problem with my heater. I did it couple of times and it worked.
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Old 11-07-2009, 07:55 PM   #25
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Low hot water pressure


Quote:
Originally Posted by crebive View Post
I last flushed my water heater when I noticed the problem. The tub is the same as all the other faucets when on, it is low, when two faucets are on, very low.

I will look at the valve, hopefully that will be the only problem. How long do water heaters last? I hear they have a "mind" of their own and can last 2 years or 20.

D
I haven't heard of either. (2 or 20). On average, they last 10-12 years. I had one last 8 years. The next one lasted EXACTLY Ten Years. Just as long as the (pro-rated) Warranty! (No matter what) Don't Drink and Drive, Ever!!!
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Old 01-10-2010, 10:39 AM   #26
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Low hot water pressure


I also had clogged pipes from hard water. First, I cleaned the screens in each faucet outlet and shower and clothes washer. Then I turned off the elec., took out the heating elements (lower), shined a light into the water heater and found a few inches of crap minerals. I took the shop vac, put a smaller half inch hose on the end of the fitting and ran it around inside the tank (after draining). After cleaning, it seemed to work fine. Hot water with no clogs. Now I have a tankless. Wish I had a tank again. No elec. $ saved. Goes off while showering. Is very temperamental. Mind of its own.
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Old 01-10-2010, 11:54 AM   #27
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Low hot water pressure


Quote:
Originally Posted by Snell Lancaster View Post
I also had clogged pipes from hard water. First, I cleaned the screens in each faucet outlet and shower and clothes washer. Then I turned off the elec., took out the heating elements (lower), shined a light into the water heater and found a few inches of crap minerals. I took the shop vac, put a smaller half inch hose on the end of the fitting and ran it around inside the tank (after draining). After cleaning, it seemed to work fine. Hot water with no clogs. Now I have a tankless. Wish I had a tank again. No elec. $ saved. Goes off while showering. Is very temperamental. Mind of its own.
You should (as a long term solution) use Chemical water softeners. Or use the services of a "Water maintenance" co. Who will gladly (for a hefty fee) service your water supply on a Monthly basis, or as needed! (No matter what) Don't Drink and Drive, Ever!!!!
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Old 02-18-2011, 04:01 PM   #28
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Low hot water pressure


Instructions


Things You'll Need:
  • One dime.

  1. 1

Go to your water heater and turn off the cold-water supply that runs to the tank. This will generally be a valve located directly above the tank, or somewhere near it, on the cold-water line. You can tell which line is cold by touching it.
  1. 2
    Go to the lowest faucet in the house that is not having the water-pressure problem, ideally a basement faucet. Turn the hot water on full and let it run.
  2. 3
    Locate the faucet that's having the problem. Close the drain (so the rubber washer can't fall down it when you take the aerator off). Remove the aerator screen at the end of the faucet by turning it clockwise. Once it's off, make sure to keep holding it in the same upright position as it was on the faucet, so the washer doesn't fall out.
  3. 4
    Press the dime into the aerator, flat side down against the screen, to completely close it off. Depending on the design, you may have to remove the washer, put the dime under it, and put the washer back in over it. In most faucets, the dime will fit perfectly. Now replace the aerator on the faucet, turning it counter-clockwise.
  4. 5
    Slowly turn on the cold water tap until it's fully on, and leave it on. Water will not come out of the faucet (because the dime is blocking it), so the water will run back through the hot-water line.
  5. 6
    Return to the faucet in step 2 and watch the water coming out; you will likely see discoloration and waste material in the water stream. Let it run for a few minutes, until the water runs clear again. Let it continue running while you go back to the faucet with the dime in it. Turn off the faucet, remove the dime, and replace the aerator. Then turn off the basement tap and turn back on the water line to the water heater.

Tips & Warnings

  • Do not turn off the basement hot-water tap until after you've gone back and turned off the tap with the dime in it.

I han very low hot water pressure in all faucets, but the cold was fine. Flushed my hot water heater and it got worse, so I did this and now have great water pressure at all faucets. Was very easy and only took about fifteen minutes!!!!
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Old 02-20-2012, 08:47 PM   #29
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Low hot water pressure


Had this problem after flushing my water heater and it was an easy fix. Check the Dielectric Union, which joins the hot water outlet from the tank to the copper pipe. Mine looked like a clogged artery from a heart attach victim ... probably 98 percent restricted. Pull the old one, sweat a new one on and I was done for $4.

They look like this:

http://www.zorotools.com/g/00059328/k-G2993094?utm_source=google_shopping&utm_medium=cpc &utm_campaign=Google_Shopping_Feed&kw={keyword}&gc lid=CMPoit2Grq4CFcrQKgod3UJ0Rw
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Old 02-20-2012, 09:04 PM   #30
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Low hot water pressure


ohh no not another low pressure scenario

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