to be clear, the leak is the faucet is allowing water to flow past to the shower head, it's not leaking in the wall.
I have a single valve Hans Grohe shower valve. Hans Grohe
TLDNR - valve was leaking (broken internally) so I replaced it and the new valve does not alway shut off water, and sometimes even if it does shut off water, it will start to drip at the shower head a few hours later.
A month ago, it started not shutting off. Took it apart and found the internal cartridge (part linked above) had cracked and it would not longer seal and shut off the water. The water shut off and mixing (hot/cold) is held inside the gray part of the assembly in the link. There is a metal slide with slots that rotates inside the cartridge and allows hot/cold water to flow. The seals are like the single handle faucet on your bathroom sinks (the small rubber seats with springs).
Delta makes a similar faucet. The two ports go into the wall assembly and it's all held in place with a threaded fitting to set it against the balance valve inside the wall.
I took the whole system apart (except for the in-wall box and pipes) and cleaned the internal brass seats so that the system would seal and not leak inside the wall. It worked fine for about a month.
A few days ago, I turned the water on to take a shower but son called so I shut off the water but it kept coming out of the shower head at a very small flow. Maybe 1-gallon an hour. So I turned it back on, let it run for a few seconds, turned to off and it shut off...but then a bit later it just started dripping. I thought maybe some hard water deposit got into the valve so I took the whole thing apart, cleaned it all out and put it back in.
Same thing is happening again. Every now and then it will just not shut off the water flow (I haven't figured out it if it's hot or cold yet - there are shut off valves in the box so I could figure it out when I get time and it happens again).
Any thoughts on why the cartridge would work most of the time, but sometimes just randomly leak bye?
Also, it's a Home Depot Delta part replacement, not Hans Grohe but it measures the exact same as the part I removed. Some of the reviews basically said the same 'works then doesn't"
I have a single valve Hans Grohe shower valve. Hans Grohe
TLDNR - valve was leaking (broken internally) so I replaced it and the new valve does not alway shut off water, and sometimes even if it does shut off water, it will start to drip at the shower head a few hours later.
A month ago, it started not shutting off. Took it apart and found the internal cartridge (part linked above) had cracked and it would not longer seal and shut off the water. The water shut off and mixing (hot/cold) is held inside the gray part of the assembly in the link. There is a metal slide with slots that rotates inside the cartridge and allows hot/cold water to flow. The seals are like the single handle faucet on your bathroom sinks (the small rubber seats with springs).
Delta makes a similar faucet. The two ports go into the wall assembly and it's all held in place with a threaded fitting to set it against the balance valve inside the wall.
I took the whole system apart (except for the in-wall box and pipes) and cleaned the internal brass seats so that the system would seal and not leak inside the wall. It worked fine for about a month.
A few days ago, I turned the water on to take a shower but son called so I shut off the water but it kept coming out of the shower head at a very small flow. Maybe 1-gallon an hour. So I turned it back on, let it run for a few seconds, turned to off and it shut off...but then a bit later it just started dripping. I thought maybe some hard water deposit got into the valve so I took the whole thing apart, cleaned it all out and put it back in.
Same thing is happening again. Every now and then it will just not shut off the water flow (I haven't figured out it if it's hot or cold yet - there are shut off valves in the box so I could figure it out when I get time and it happens again).
Any thoughts on why the cartridge would work most of the time, but sometimes just randomly leak bye?
Also, it's a Home Depot Delta part replacement, not Hans Grohe but it measures the exact same as the part I removed. Some of the reviews basically said the same 'works then doesn't"