Why does the shower faucet keep dripping?

[ariel]

Hello, I am new here and wanted to get some advise.
My parents shower keeps dripping but from the tub faucet. I changed the o rings and springs on his Delta cartridge and it kept leaking.
I later decided to get a brand new cartridge and the leak is much, much less now but still it keeps dripping a tiny amount every 5 seconds or so. When turned OFF I hear no water flow but still drips from the tub faucet.
Can someone please give me any ideas as to why it still drips some?

 

[Sylvan]

When you replaced a cartridge did you flush the lines to make sure here is no sediment?

 

[Sponsor]

 

[ariel]

When you replaced a cartridge did you flush the lines to make sure here is no sediment?

I used a Q tip and cleaned around to make sure there was no sediments but it was clean. I also had water flow out for a min before I placed the cartridge.

 

[hj]

The cartridge stops the flow, so if ANY water is leaking it is either a bad cartridge or a damaged valve body.

 

[Jadnashua]

If the valve body is scratched, the seals can leak...they require a smooth surface. If you don't have the seals installed properly, they can leak. You can tear one if there are any sharp edges, or they get pinched during the install. They may or may not have any plumber's grease on them...some silicon grease will make the valve turn smoother and lengthen the life of the seals.

As was asked, if there's any debris in the lines and you don't flush it out first, that can lead to scoring of the valve body, and potentially damage to the seals.

 

[ariel]

Thanks guys! I went by my parents house today and not a drop of water while off. I think I got ahead of myself. The reason it kept dripping could be because of the remaining water that was in the pipe from dripping for a couple of days. All good now.