Brass, and with rubber stopper. Ceramic that turn 1/4 round will not last.

The old/traditional stop valve using internal rubber stopper are much more reliable. Ceramic are not lasting.

Not all using rubber now, some are using ceramic disc. Any small particle in the water if hit the ceramic may damage the disc.

I find the ball valve sometime can jammed especially not turned for sometime.

I got the good quality type, maybe is the exposure to the outdoor, it need extra strength to turn it after sometime not use. After that is ok.

For exposed Indoor use, ball valve will not be nice (I have not see any nice ball valve)

Mine exactly the same, only if need to turn it need some strength after that is ok. Perhaps quality have drop compared to 20 yrs ago product. The top screw also rust, change once before.

Plastic definitely useless especially expose. I changed my outdoor plastic to brass

Where do you plan to use it for? I believe both are equally good. From my personal knowledge SS is just coating, the underlining still brass, i have few SS and the top layer came off.

This post has been edited by weikee: May 25 2017, 02:16 PM

For indoor not expose, use brass lah. No need waste money.

3/4" i can handle lah, per my earlier explanation the thing tend to jammed, but after it move is ok.

This one yet to jammed, if it does will need pull the level while holding the pvc.

What do you mean by conceal into wall? including the valve and expose the level only? I am not sure if there such ball valve with long neck like the brass, without long neck is hard to conceal into the wall without exposing large area. Bass/SS rubber type definitely can because i have few conceal, and just make sure you have access to the nut at the neck, less hassle if need to change the rubber.

Yup, as expected. Unless there different design. If don't have just use the normal brass valve with rubber there is proper name for it (maybe is called globe or shutoff valve)

Inside the valve, have to take out the bigger nut (see the picture, have to take out the nut below the packing washer)

https://cdn2.tmbi.com/TFH/Step-By-Step/FH02OCT_WAVALE_02.JPG

Can ask the hardware shop. My understanding the rubber gasket are common things can be purchase easily.