Delta Single-Handle Valve Cartridge RP50587

I have ZERO plumbing skills, other than replacing some inner parts of a toilet tank, so when i researched that the drip in the faucet was from this part that needed to be replaced, i was skeptical i could do it, but other reviews said it was easy. Sure enough, very easy to do, the faucet works like NEW now, no drip! Go for it!

This valve cartridge is will designed, easy to replace when it starts getting old and starts dripping. And warranted for life by Delta! Be sure to register your purchase so Delta can replace it if or when it starts leaking. Delta has a wonderful warranty and quick replacement of any of their products!

Easy ordering process and delivery just as promised! The OEM Delta part works great!

Very nice not to have a dripping faucet anymore.

would be nice to have more detail about installing

The original cartridge in my 2017 Leland kitchen faucet only lasted 2yrs before the drips started. The second cartridge lasted another 7yrs before failing the same way. Both times it took only a few minutes on the phone and Delta sent a free replacement. Kudos to them for standing by their product. I am a bit surprised that Delta did not come up with an improvement on the RP50587, but maybe they have moved away from this cartridge on new faucets. Seven years is good, but I have seen other similar design (ceramic valve) faucets last over 20yrs without leaking. This design uses two polished ceramic plates that slide against each other. The plates are forced against each other by the plastic case and partly by the faucet bonnet nut. When the holes in the plates line up, the water flows. When the movable plate slides far enough the holes no longer line up the water stops. On this failed cartridge there is no obvious reason for failure - the plate faces are still highly polished with no obvious scoring or wear on other moving parts - so why is it leaking? It is possible the plates while still polished, are no longer flat and do not mate well when moved around. There could also be tiny wear in the actuating parts that together prevent the moving plate from sliding as far closed as before. The forces that push the plates together may have lessened over time due to aging of the plastic/rubber pieces. Does Delta know what the failure mode is?

Once again, have to contact Delta for another replacement. I think this is will be my 5th. Bad design leads to failed gaskets and the set screw for the handle doesn't line up with the replacements 🤦‍♂️

What I hate about this faucet cartridge is that it is impossible to adjust it to the correct temperature setting. If you move it a micron to the left, it is full on hot. One micron to the right, it is full on cold. It will not easily go to the middle nor stay there. It is annoying to use at all times! I wish we could go back to springs and seals!! And it's ridiculously expensive.

Like many other reviews, mine lasted about two years. You know how bad your product has to be to only have a 2.9 review rating? I guess they know they have you over a barrel, since it's buy another one or new faucet.

I have replaced this cartridge several times and have experienced the same problem over and over. It fails to shut off without dripping most the time requiring handle wiggling to find a sweet spot. I have used Delta parts as well as knock offs with the same results.