Single handle Moen (shower only) has slow leak from pipe out of wall

[Caccaco]

I am using very technical terms here but have pictures to better explain it. Our Moen shower fixture is leaking. I took off the shower head to see if it leaks directly from the wall and it does:

Its a slow but very steady drip and over the past couple of weeks has been increasing in speed. I no longer thing it's just water left over from a shower as it will still be dripping hours later.

This is what the handle part looks like as well as the Moen logo.

So where do I go from here to stop this?

 

[Terry]

This Moen valve needs a new cartridge then. Either the 1200 or the 1225

 

[Sponsor]

 

[Caccaco]

Thanks!

Is the 1200 and 1225 interchangable? Home Depot right down the road has one I can go pick up tomorrow if so.

 

[Terry]

Either one works. The 1200 is brass, the 1225 is plastic.

 

[Caccaco]

Got the brass one yesterday and replaced it, simple job and it does appear to have stopped the leak, so thanks!

One thing I noticed when I took it apart while following the guides is that there were three of these metal washers/trim things inside:

When I put it all back together I only used one and left these two out. Any idea on why this would have been like this?

 

[Terry]

Normally they give you one washer, and that's all I've ever used.

 

[Caccaco]

So me just putting all of the extras in a drawer shouldn't matter much, right?

Its been two weeks now, no leaks detected from the shower head itself.

 

[Tuttles Revenge]

If you save all the extra parts in a place you can actually find them later you will never need them. If however you toss them or place them in a "safe" place, you will need them.