Best way to brace a water pipe

Factual Questions
1

We just had a minor flood under our bathroom sink. The faucet is connected using those plastic (or whatever) pipes. This pulled out from the metal shutoff valve, spraying water.

The issue I have is that the copper pipes aren’t supported below the floor. Essentially, the plastic pipe is holding the copper pipe up, and every time the water is used, there’s pressure forcing the copper pipe down. Over time, the plastic pipe works its way loose. Without the plastic tube attached, the pipe can be pulled up or pushed down, with maybe 1/2 inch of play (I didn’t force it to see just how far it would go).

I had this issue below our kitchen sink as well. There, there is a 3 to 4 foot horizontal run of pipe before a 90 degree bend to go up into the sink. In that case, the pipe was accessible from below, and I added wooden braces under the pipe, to support it.

In this case, I can’t get to the pipe below the floor easily. So my idea is to attach something to the water pipe where it goes through the bottom of the cabinet to support the pipe there.

What would work best for this? Off the top of my head, I could use epoxy to glue something, or some kind of clamp. I’d favor a clamp, but will that corrode either the clamp or the pipe? Or are there all-copper clamps available that I should use?

There are those little collars on the pipe. I don’t have access to under the cabinet bottom, so it will be under the collar, but above the cabinet bottom. If it would fit completely under that, that would be ideal. The pipe is 5/8 inch, the collar is 2.5 inches diameter, and the hole through the cabinet is about 3/4 inch.

2

Copper strap available at most large hardware stores like Rona is often used as a clamp for water lines. Sinking a screw on each side of the line tightens the strap and holds the line in place.

3

yes copper pipe strap, for that size of pipe, should be holding the pipe in place. you would want this inside the wall or floor cavity when the plumbing was installed. applying to the wall surface will work if that is your situation now.

4

I don’t think that will work. The pipe comes vertically up through the bottom of the cabinet, and about 6 inches from the wall.

5

you put a block on the floor of the cabinet next to the pipe, fasten the block to the cabinet floor, place the pipe strap to the block as if it were a wall surface or a wall stud.