[Gpgm71]

Grohe shower valve

[Wanderman]

Here's the manual from mine. Cartridges are available.. look around as prices vary wildly.

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I was just searching for parts for my kitchen faucet and came upon a thread in here about it and many said that the Grohe faucets have a lifetime warranty, wonder if this goes for the cartridge as well? I am going to call them and see as my handle on my faucet has deteriorating rubber on it, it’s all sticky.

[Jonestead]

I easily found new and used on Amazon

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I contacted Grohe for a replacement part (they had sent me the kitchen faucet head N/C in the past).
Once I said RV, they told me the warranty doesn't cover RV installations.
FYI, say home not motorhome!