Copper Fitting 1/2 Inch (HVAC Outer Dimension) 3/8 Inch (Plumbing Inner Dimension) - Straight Copper Coupling Fittings With Rolled Tube Stop & HVAC – 99.9% Pure Copper - 10 Pack

I heard that copper helps with algae in your pool, so I'm trying it out. Been struggling with algae this year and not had any algae problems in the past few years so it's rather strange. I made this from the copper elbows so please don't ask me if they're good for actual copper piping. They were easy to work with and very shiny but dulled after 2 days in the pool. Water is still very cloudy and slightly green. Hoping this will help clear my water.

Great product at a good price. Works as described

Pool skimmer

These aren't even close to the right size to ensure a proper solder joint. There is probably almost a 1/16th of an inch of slop between the fitting and the pipe. Total junk. Don't buy them

On the thin side

These are quality made couplers with a nice rolled stop. They are clean and don't have burrs all for a great price!

I have bought the Copper Fitting 3/4 Inch (HVAC Outer Dimension) 5/8 Inch (Plumbing Inner Dimension).The inner diameter is 3/4 inch. You can use these with 3/4 inch pipe for refrigeration equipment. This kind of pipe is measured on the outside diameter. I'm not sure that 5/8 inch plumbing pipe (measured on the inside diameter) would fit well.

No supply houses had any in stock so I ordered on Amazon and was pleased with the quality.

A 1/2” copper elbow should fit a 1/2” copper pipe. It DOES NOT. Not inside nor outside. I don’t know what these are meant for.

These are NOT sized properly! I should have read the reviews. Does not fit inside or outside of the 3/4 pipe.