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Old 09-20-2020, 04:57 PM   #1
twobullz
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Default Plumbing Help

So our kitchen sink has lost about half of its hot water pressure. The cold is good, the rest of the house the pressure is good, just the kitchen sink. Any suggestions on where to even start looking? We do have a dishwasher and haven't noticed any difference with it.

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Old 09-20-2020, 05:41 PM   #2
DogZilla15
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Default Re: Plumbing Help

I had same problem once. I shut the water off under the sink then turned it back on. Problem solved. The valve just had some crud stuck in it. Might give that a try.
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Old 09-20-2020, 07:33 PM   #3
flatman
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Default Re: Plumbing Help

check the shut off as dog said. and take out the little filter diverter that is inside the very end of the faucet they get full of crap and run it for awhile with it out so more water goes through and it might push out the plug.


if all fails take off the line at the shut off and blow through the faucet to see if you get enough air. try running some mono down each end.


if not then put a bucket under the shut off and try to flush it out , then if that doesnt work turn off the whole house water and get all the pressure out and open the shut off and run the mono back down that way. you can try doing it while there is pressure but you may get wet.

if all fails you has gremlins.



we are assuming you get good hot water at all you other spots in the house.
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Old 09-20-2020, 08:00 PM   #4
lentz
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Default Re: Plumbing Help

Aerator could be full of junk.
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Old 09-20-2020, 08:18 PM   #5
twobullz
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Default Re: Plumbing Help

I will give taking the hot water hose off and seeing if it has a clog. I am guessing it is not the aerator at the end of the faucet since the cold water is coming fine through it.
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Old 09-20-2020, 08:35 PM   #6
rworegon
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Default Re: Plumbing Help

Maybe calcium or other foreign material in the mixing valve on the hot water side?
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Old 09-20-2020, 08:48 PM   #7
squidward
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Default Re: Plumbing Help

Quote:
Originally Posted by lentz View Post
Aerator could be full of junk.
Not if the cold is fine,, single handle or double ? Could be deposits as mentioned or the rubber washer at the angle stop sometimes falls apart and can block flow at the faucet.


I would suggest hit it with a sledge hammer or shoot it.
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Old 09-20-2020, 08:55 PM   #8
Fishfeet
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Default Re: Plumbing Help

Hot water is coming from the water heater. Which builds up or collects a bunch of sediment over the years.
Shut off the valve under the sink and make sure it is not clogged. Then replace it or clean it if possible.
If that doesn't do the the trick , use the process of insemination.
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Old 09-20-2020, 09:06 PM   #9
fishin"G"man
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Default Re: Plumbing Help

I've had the old brass valves go bad and the solid copper tubes would gunk up right at the valve base. Replacing valves is a little more work especially if they are compression fit (not screw on/off). The new quarter turn valves seem to be better IMO. They have nylon inside parts and don't seem to gather calcium deposits as bad.

Could be just crap build up in the aerator but you said cold water is fine. That sorta takes the aerator out of the picture IMHO.
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Old 09-20-2020, 09:43 PM   #10
Root Hog or Die
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Default Re: Plumbing Help

If it is only the hot water, it is not the aerator, as that would reduce the flow of both the hot and cold.

90% there is a flow restitution either at the angle stop under the sink or the valve in the faucet.

First thing first, if you turn off the angle stop, does it turn off the hot water completely? Once we determine that lets go on from there.

Last edited by Root Hog or Die; 09-20-2020 at 10:27 PM.
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Old 09-20-2020, 10:11 PM   #11
lentz
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Default Re: Plumbing Help

Quote:
Originally Posted by squidward View Post
Not if the cold is fine,, single handle or double ? Could be deposits as mentioned or the rubber washer at the angle stop sometimes falls apart and can block flow at the faucet.


I would suggest hit it with a sledge hammer or shoot it.
true...
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Old 09-20-2020, 10:54 PM   #12
flatman
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always do the easy to do things first and dont assume even it your assumption seems right.
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Old 09-21-2020, 09:41 AM   #13
Califbill
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Default Re: Plumbing Help

Stuff is plugging the hose from the angle stop to the faucet. Mine would build up in the end of the hose where it connected, or where the hose connect3d to the faucet.
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Old 09-21-2020, 10:34 AM   #14
Bladdershy
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I'd crack your crawl hatch open and smell. You'll know if it underneath or not. I take it its galv pipe?? If it is, shut your water off and replace the valve under sink. Its most likely has scale in it
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Old 09-21-2020, 12:35 PM   #15
Mighty Duck
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Default Re: Plumbing Help

switch the hot and cold hose connections. then you will know if it is the facet or further down your water line.
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Old 09-21-2020, 12:44 PM   #16
team anarchy
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Quote:
Originally Posted by Mighty Duck View Post
switch the hot and cold hose connections. then you will know if it is the facet or further down your water line.

Great idea!!
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Old 09-21-2020, 05:23 PM   #17
twobullz
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Default Re: Plumbing Help

Okay I switched the hot and cold pipes from and the cold then didn't have the pressure. I ran a piece of monofilament up the hot water tubing and my water pressure increased. I will watch it over the next couple days to see if it maintains. Thank you all for the ideas and solutions
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Old 09-21-2020, 05:51 PM   #18
DogZilla15
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Where do we send the bill???
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Old 09-21-2020, 05:59 PM   #19
Reel fortunate
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Quote:
Originally Posted by DogZilla15 View Post
Where do we send the bill???
Good one Dog Z !

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