Push-Fit Shutoff Valve Trouble

criticalmass048February 12, 2012

I'm doing some toilet work, so I'm installing a shutoff valve on the toilet water supply, because the idiot who did the plumbing in this place 60 years ago never put one in.

Looking for the easy way out, I was handed a "Quick Lock Quarter Turn Angle Valve Push Fit Application". The specs say 5/8" O.D. Inlet (1/2" NOM), 3/8" Outlet. I'm putting it on a 1/2" copper pipe stubout.

I cannot get it to stay on, no matter what I do, and now the big box store is closed for the night, meaning I have no water, since I turned it off before I cut the pipe. HOW THE HECK DOES THIS SIMPLE THING WORK??

When will I EVER listen that things are not as easy as they seem, and I should NEVER start a project on a Sunday? HELP!

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llaatt22

You are aware that copper is tubing and tubing is specified by inside diameter. Fittings like shut off valves are commonly specified by the tube inside diameter on their plastic bags or blister packs as well even though the item interfaces with the outside diameter when being installed.
Confirm you are referring to the inside diameter re "1/2" copper pipe stubout".

    Bookmark   February 13, 2012 at 12:01AM
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justalurker

The most important rule in DIY... always start DIY projects at 8AM. The time most parts stores open.

The second most important rule in DIY comes from Clint Eastwood in Magnum Force... "A man's got to know his limitations"

Take the piece you cut off to the store and get the correct angle stop for that size tubing.

    Bookmark   February 13, 2012 at 11:41AM
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lazypup

1/2" copper pipe is 5/8" OD,,therefore the fitting he has is the correct size for the pipe he is working on...

Having said that, it then comes down to this..those push on type fittings ARE NOT code approved for potable water service..

The simple solution is to get a 1/2"ID (5/8"OD" x 3/8" output COMPRESSION TYPE angle stop. You the clean the end of the line, slip the compression nut on the line, then slip the compression ferrule on the line, slide the valve on until it stops, then slide the nut forward to meet the valve and tighten the nut finger tight, then hold the valve with one wrench while tightening the nut with a second wrench and you will have an ASTM approved connection and you can sleep good without worrying about will that DIY junk hold up.

    Bookmark   February 13, 2012 at 12:42PM
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justalurker

The Pup is right again and the OP has the answer as long as he cut the tubing with a tubing cutter and not a sawzall ;-)

    Bookmark   February 13, 2012 at 12:54PM
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asolo

".....cut the tubing with a tubing cutter and not a sawzall...."

Regret to admit I know exactly what you mean. Experience can be a harsh teacher.

    Bookmark   February 13, 2012 at 1:18PM
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