Here is the problem. When I turn on the hot water in my bathroom sink, I have a good volumn of water.But as it gets warm the volumn slows down and when it get's hot it slows to a trickle. The hot water works fine in the bathtub. Any plumbers out there? The house is about 55 years old with copper tubing. Thanks, Jay

__________________
Thank you, Jay
83MB 300D 241K "The silver coffin"
10 Prius lll 1K
95 MB E300D 120K Mable
02 Saab 9-5 Areo 131K
Cannondale SR500
www.thecornerstonefamily.org/

All the delivery problems I have run across have been a result of sediment in the pipe. But your symptoms seem atypical. Copper pipe usually does not build up a lot of sediment and I don't understand why the flow decreases as it gets hotter. However, sediment problems do show up in hot water pipes more so than cold water pipes. I'd begin by taking the faucet apart and looking inside.

If you turn the faucet off when it is slow and hot, leave it off for a few seconds and then turn it back on again, is the problem still there? You could try turning off the hot water heater and then running the faucet to determine if the problem is caused by the heat or the flow.

__________________
1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13

Thanks, Kerry. I'll try those tests this weekend. Jay

__________________
Thank you, Jay
83MB 300D 241K "The silver coffin"
10 Prius lll 1K
95 MB E300D 120K Mable
02 Saab 9-5 Areo 131K
Cannondale SR500
www.thecornerstonefamily.org/

Had a similar prob with the CA house a few years back, once good and hot the flow slowed to a trickle. Found the screen filter clogging up with white crud. Talked to a neighbor and found he had the same problem, but it was repaired under a builder's recall. Too far out of date for mine, but got enough info to determine the cause. In my case the dip tube in the water heater was of faulty PVC, which deteriorated over time. Only recourse for me was to replace the water tank. Once replaced the hot water flow returned to normal and remains steady to date.

The tank was chock full of deteriorated PVC, basically the same scenario as one filled with sediment.

__________________
Mike Tangas
'73 280SEL 4.5 (9/72)- RIP
Only 8,173 units built from 5/71 thru 11/72

'02 CLK320 Cabriolet - wifey's mid-life crisis

2012 VW Jetta Sportwagon TDI...at least its a diesel

Non illegitemae carborundum.

Unscrew the valve and check the washer (assuming the valve has a washer )

A loose washer could could move and slow down the water when it gets hot.

While on the subject of heaters and sediment...

I think it's a good idea to open the drain once a year, and flush out the sediment. Naturally, you need to be careful, since not only is the water hot, but under pressure. Often you can attach a garden hose, and run it outdoors. Just a few moments ought to do it - you'll have to judge by the contents/looks of the water.

__________________
It is a truism that almost any sect, cult, or religion will legislate its creed into law if it acquires the political power to do so. Robert A. Heinlein


09 Jetta TDI
1985 300D

Turn off the hot water at the valve under the sink. Disconnect the line from the valve to the faucet. If the line is a pipe slide a 1/2" hose over it and direct the flow into a bucket on the floor. If it is a flexable pipe just point it into a bucket. Open the valve and see if the flow slows down as it gets hot. If it doesn't slow donw then the problem is the faucet packing and the washer. These will somethimes swell up when they get hot and restrict the flow.

If, with the faucet disconnected, the flow slows down then it could be the packing in the shut off valve. You can turn off the house water at the meter, pull the top off the valve under the sink and see if the packing and washer are good. If they are old it is best to repalce the entire valve. If you decide on this be careful because if the valve is old the connecting pipe from the wall is also old. If you twist off the wall nipple the chances are good that you will have to go into the wall to the elbow.

I don't think the problem is sediment. If it were then you would have restricted flow as soon as you turned on the water.

Excellent advice. I was going to say it but you beat me to it. I always try to isolate the phenomenon.

__________________
1986 300SDL, 362K
1984 300D, 138K

Thanks, guys. I'll let you know what I find. Jay

__________________
Thank you, Jay
83MB 300D 241K "The silver coffin"
10 Prius lll 1K
95 MB E300D 120K Mable
02 Saab 9-5 Areo 131K
Cannondale SR500
www.thecornerstonefamily.org/