cold water supply line blockage. How do you clear it?

dreams11March 11, 2008

I Have a 1930's house that has a water supply problem in the second floor bathroom. The cold water supply to the sink has a blockage but the bathtub has a good flow. the hot water is fine to both.

I took the on/off valve off of the pipe to make sure it wasn't the valve or the the faucet. With the main water line on that pipe still produces a small trickle. All other

flows in the house are fine. This sink has not been used for many years due to a large crack in it. I decided to replace the sink but now the water flow problem.

What options do I have to try and clear the blockage or am i out of luck and the pipe will have to be replaced. (ripping walls out ect yikes!)

thanks in advance.

scott

Thank you for reporting this comment. Undo
dan_martyn

Assuming you have galvanized piping, the only answer would be to replace it. When you do replace it you will probably find that the inside diameter of the pipe is only a pin hole.

Good time to do a bathroom renovation.

Dan Martyn

    Bookmark   March 11, 2008 at 10:45AM
Thank you for reporting this comment. Undo
coolvt

Here's a trick that we used in an area that had hard water with resulting build up in the pipe....if it works it could get you by for a few years......we made up fittings that would either screw directly on to the pipe or to the faucet aerator. In this fitting we used a male and female quick connect like you would find used in air tools.
We would hook a compressor up to this, turn the water on and blow air into the line. With the compressor still running quickly disconnect the "quick connect". Water and grit will blow out of the line....it will be like sandblasting so you have to be carefull of your eyes and anything elset that could be damaged. We would do this over and over for 20 or 30 minutes if necessary. Each time we would see and increase in water flow. When it got to the point of being satisfactory, we'd stop.
You will find that with lots of minerals in the water this problem will develop with pipes that are not used for a long time. We had this in old mobile homes where the water was shut off and drained for the winter. With the ones that were not shut off, we never had a serious problem.
It will take a little poking around to come up with the fittings to make the tool that I've described above, but it should work.
We once had a straight main, galvanized supply coming into a house that had the same problem. We took off the valve and ran a small electric snake down the line. The water and grit blew out like you wouldn't believe. We did that about 15 yrs. ago and I think that supply line is still feeding the house. This last one is probably not going to be accepted by local authorities if you have a munnicipal supply:-)
mark

    Bookmark   March 14, 2008 at 9:31AM
Thank you for reporting this comment. Undo
dreams11

thanks for the reply guys.

I'm going to try the compressor trick but if that doesn't work I think I will try and run a flex hose from the toilet supply (20 inches away) thru wall to where the original sink supply stub out is.

How do I unscrew the 80 year old stubout and 90 degree fitting from the blocked supply line? If I have no choice but to cut it is t possible to cap it without threads? what options do I have? ( I need to take the old stubout off so I can attach a piece of pipe to the flex line and have the new piece of pipe connect to the on/off valve so it all looks original from the outside)

thanks

    Bookmark   March 20, 2008 at 12:33PM
Sign Up to comment
More Discussions
Quality of what general contactor is providing
I don't feel qualified to inspect my new home currently...
Larry Lotter
Costco Water Ridge Dual Flush -- Need reviews
Any more reviews on the dual flush Water Ridge toilet?...
smudgecat99
Fleck 9100 SXT Programming/Settings
I am finally installing my new Fleck 9100 SXT!!! Thanks...
rss1978
what brand water softener
have 2400 sq ft rancher on town water. do not have...
questionoftheday
Improving water pressure to outside spigot
I would like to improve the pressure and flow rate...
greasetrap
Sponsored Products
Eliot Sectional with Bumper - Cordova Picante Orange
Joybird Furniture
Home Decorators Indoor/Outdoor Area Rug: Home Decorators Collection Rugs
Home Depot
Brushed Nickel Whitehaus 3-2851 Single Hole Prep Swivel Kitchen Faucet
$309.00 | Blue Bath
Water Creation Bathroom 24 in. Vanity in Espresso with Marble Vanity Top in
Home Depot
Copper Brown Wall Art
$215.00 | FRONTGATE
Primo Grill 2 Piece Island Cart - Oval Large 300/XL 400 - AMK439
$651.00 | Hayneedle
© 2015 Houzz Inc. Houzz® The new way to design your home™