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07-09-2020, 11:22 AM
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#1
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Guru
City: Bethesda, MD
Vessel Name: Solstice
Vessel Model: Grand Banks 47 Eastbay FB
Join Date: Feb 2018
Posts: 2,164
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Grohe shower mixer model#?
Anyone know what model shower mixer they put in a Grand Banks Eastbay 47? The handle reads Grohe, as does the hand attachment, but no model numbers were visible.
The one in ours has developed a leak. I'm assuming it's the mixer cartridge. But I didn't have the chance to tear it all apart this past week. It'd be nice to figure out which one is needed and take it with me rather than some back/forth and ordering delays.
__________________
-- Bill Kearney
2005 Eastbay 47 FB - Solstice, w/Highfield CL360 tender
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07-09-2020, 07:11 PM
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#2
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Senior Member
City: Brisbane
Vessel Name: Beluga
Vessel Model: Grand Banks 46eu 2006 hull#289
Join Date: Apr 2016
Posts: 223
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I had a similar issue and could not find a part number nor an identical new one - solved it by going to local plumbing store and buying a new Hans Grohe shower head. (Hans Grohe is the slightly cheaper version of Grohe).
The new one looks slightly slimmer in the head area, but it slots in perfectly to the old overhead holder (so there is no need to change that part).
Hamish.
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07-10-2020, 01:00 AM
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#3
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Guru
City: Santa Cruz, CA
Vessel Name: Concerto
Vessel Model: 1980 Cheoy Lee
Join Date: May 2013
Posts: 1,531
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It's likely a euro disc. Parts are usually readily available. Grohe has not made that many valves compared to other manufactures. You can likely bring the existing cartridge to a good plumbing supply house and walk out with a replacement cartridge. It should be a rather painless procedure compared to many other valves.
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07-10-2020, 08:35 AM
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#4
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Guru
City: Bethesda, MD
Vessel Name: Solstice
Vessel Model: Grand Banks 47 Eastbay FB
Join Date: Feb 2018
Posts: 2,164
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Quote:
Originally Posted by BrisHamish
I had a similar issue and could not find a part number nor an identical new one - solved it by going to local plumbing store and buying a new Hans Grohe shower head. (Hans Grohe is the slightly cheaper version of Grohe).
The new one looks slightly slimmer in the head area, but it slots in perfectly to the old overhead holder (so there is no need to change that part).
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It's the in-wall mixer that's leaking, not the handshower unit. I included that in the pictures to help clarify what kind of setup is installed.
Grohe and Hansgrohe are two separate companies, unrelated to each other. Grohe units are, as you point out, often slightly less expensive than Hansgrohe units. We've got Hansgrohe units in the house, everywhere except the guest and basement bath showers. I've got a spare Hansgrohe pull-out kitchen faucet that I've been tempted to reinstall on the boat, to replace the galley sink spout. But that's further down the 'to do' list.
Looks like I'll have to make a specific plumbing trip to extract the installed mixer cartridge. It'd be nice if there was an option to replace it with a thermostatic mixer, as the water heater tends to make really hot water. But that'd likely require replacing the whole assembly, which might be more involved than I'd like.
__________________
-- Bill Kearney
2005 Eastbay 47 FB - Solstice, w/Highfield CL360 tender
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07-10-2020, 02:21 PM
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#5
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Guru
City: Santa Cruz, CA
Vessel Name: Concerto
Vessel Model: 1980 Cheoy Lee
Join Date: May 2013
Posts: 1,531
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Quote:
Originally Posted by wkearney99
Grohe and Hansgrohe are two separate companies, unrelated to each other. Grohe units are, as you point out, often slightly less expensive than Hansgrohe units.
Looks like I'll have to make a specific plumbing trip to extract the installed mixer cartridge. It'd be nice if there was an option to replace it with a thermostatic mixer, as the water heater tends to make really hot water. But that'd likely require replacing the whole assembly, which might be more involved than I'd like.
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Grohe is the better company with better hardware. Hansgrohe has covertly moved most of its manufacturing to china over the last 2 decades. Along with that move has come a rather large decrease in quality and increase in 'plastic' parts. You will not be able to easily swap the current mixer with a thermostatic mixer. It can be done, but it would not be a simple job like replacing a ceramic disc cartridge (15 minutes). The existing valve is already better than 99.9 percent of marine shower valves, so don't feel bad.
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07-10-2020, 08:26 PM
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#6
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Guru
City: Bethesda, MD
Vessel Name: Solstice
Vessel Model: Grand Banks 47 Eastbay FB
Join Date: Feb 2018
Posts: 2,164
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Quote:
Originally Posted by bligh
...The existing valve is already better than 99.9 percent of marine shower valves, so don't feel bad.
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Agreed.
__________________
-- Bill Kearney
2005 Eastbay 47 FB - Solstice, w/Highfield CL360 tender
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07-13-2020, 03:41 PM
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#7
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Guru
City: Bethesda, MD
Vessel Name: Solstice
Vessel Model: Grand Banks 47 Eastbay FB
Join Date: Feb 2018
Posts: 2,164
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Got down to the boat today, it's a Grohe 46048
Ordered up a replacement that should be here tomorrow.
https://www.amazon.com/gp/product/B000P0BCNY
Curiously, when I disassembled it I noted there are three o-rings on the back side of it. One of them was misshapen. Possibly 'blown out' over the winter due to residual water that froze. I flipped it and the rest of the o-rings over and re-seated the unit. That appears to have at least temporarily solved the leak. The replacement cartridge comes with new o-rings, so I didn't bother tearing this one down further.
There's zero chance of changing the mixer from the front. But it is along side a recessed shelf that could be removed. I'm not that bent on making the job THAT complicated though.
The tedious part of the job was removing the screws holding the faceplate in position. Yeesh, they were like 2" long, fine-threaded and tight. Turn, turn, turn, with the manual screwdriver... hmmm... dig out the cordless Ryobi I've kept onboard and discover.... THE CHUCK HAS RUSTED STUCK. Great, one job turns into two... ain't that always the case...
__________________
-- Bill Kearney
2005 Eastbay 47 FB - Solstice, w/Highfield CL360 tender
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