bob_vila
New Member
Hi there,
I wanted to add a few breadcrumbs to the internet regarding an older Grohe Sentosa shower trim while also adding to the discussion a bit. I've replaced the thermostatic mixing valve on a Sentosa shower trim with part 47450. The issue I'm hitting is that with the new cartridge greased and installed, I'm seeing a moderate amount of leaking from a weep hole in the black adjusting nut for the thermostatic valve.
Seems like something is wrong with my replacement cartridge but I won't be able to contact Grohe support until tomorrow. Adding this context to the internet as it's a bit tricky to find good information about this particular mixing valve / shower trim combo (understandably as it's nearly 20 years old).
Given that the leak is coming from this newly purchased part and not the mating surfaces of the shower body and the part, I'm chalking this up to there being something wrong with the part. That said, I'm checking here to see if there's some user error that I'm unaware of. Is this leak user error? Is there a common reason why you'd see this weep hole leaking so badly after installing a new cartridge? (I've seen pics of it leaking as part of a failure. Example here.)
I've included the manual for this shower trim to confirm the part numbers along with some more detailed shots for anyone in the future looking to compare their components.
Thanks!
I've attached the docs for this shower trim with parts callouts. In addition I've included a picture of the inside of the adjustment nut as I never saw anyone show pictures online. I also included an after shot of the old thermostatic valve showing how it didn't have a hole machined in it like the new one. I removed an o-ring that otherwise retains the piston part of the cartridge.
I wanted to add a few breadcrumbs to the internet regarding an older Grohe Sentosa shower trim while also adding to the discussion a bit. I've replaced the thermostatic mixing valve on a Sentosa shower trim with part 47450. The issue I'm hitting is that with the new cartridge greased and installed, I'm seeing a moderate amount of leaking from a weep hole in the black adjusting nut for the thermostatic valve.
Seems like something is wrong with my replacement cartridge but I won't be able to contact Grohe support until tomorrow. Adding this context to the internet as it's a bit tricky to find good information about this particular mixing valve / shower trim combo (understandably as it's nearly 20 years old).
Given that the leak is coming from this newly purchased part and not the mating surfaces of the shower body and the part, I'm chalking this up to there being something wrong with the part. That said, I'm checking here to see if there's some user error that I'm unaware of. Is this leak user error? Is there a common reason why you'd see this weep hole leaking so badly after installing a new cartridge? (I've seen pics of it leaking as part of a failure. Example here.)
I've included the manual for this shower trim to confirm the part numbers along with some more detailed shots for anyone in the future looking to compare their components.
Thanks!
I've attached the docs for this shower trim with parts callouts. In addition I've included a picture of the inside of the adjustment nut as I never saw anyone show pictures online. I also included an after shot of the old thermostatic valve showing how it didn't have a hole machined in it like the new one. I removed an o-ring that otherwise retains the piston part of the cartridge.
