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Replacement Dual Diverter Valve Assembly for B&B Nautilus P3/P4 Panels - 1/2" MPT
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B and B Molders

Replacement Dual Diverter Valve Assembly for B&B Nautilus P3/P4 Panels - 1/2" MPT

Part Number: BM88GR
36 Reviews | 1 Questions
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$111.59
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b and molders accessories parts smart rv replacement dual diverter valve assembly for b&b nautilus p3/p4 panels - 1/2 inch mpt

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Replaces a dual diverter plumbing assembly on your B&B Nautilus water control panel. Works on your B&B 94343, 94345, or 94346. Two connected diverter T's feature 1/2" MPT fittings set for P3/P4 units. 1-800-940-8924 to order B and B Molders accessories and parts part number BM88GR or order online at etrailer.com. Free expert support on all B and B Molders products. Great prices and Fastest Shipping for Replacement Dual Diverter Valve Assembly for B&B Nautilus P3/P4 Panels - 1/2" MPT. Accessories and Parts reviews from real customers.
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B and B Molders Accessories and Parts - BM88GR

  • Smart RV
  • Diverter Valve
  • B and B Molders

Replaces a dual diverter plumbing assembly on your B&B Nautilus water control panel. Works on your B&B 94343, 94345, or 94346. Two connected diverter T's feature 1/2" MPT fittings set for P3/P4 units.


Features:

  • Replaces a dual diverter valve plumbing assembly on your B&B RV Nautilus water control panel
  • Works with rear diverter assembly on B&B models 94343, 94345, 94346
  • Consists of two connected diverter valve T-fittings equipped with 1/2" MPT fittings set for P3
  • All plumbing connections sit behind the panel
    • The dual diverter assembly integrates directly with the panel


Fits:

  • Nautilus P3: 94343
  • Nautilus P4: 94345
  • Nautilus P4: 94346


725-008-00031 B and B Molders Diverter, 5 Port, 1/2 Thread, W/T-Fitting (P3,P4)







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Video of Replacement Dual Diverter Valve Assembly for B&B Nautilus P3/P4 Panels - 1/2" MPT
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Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Review of B and B Molders Replacement Dual Diverter Valve Assembly Nautilus P3 P4 - BM88GR

Hi everybody, Andy here with etrailer.com. Let's take a real quick look at this B&B replacement dual diverter valve assembly. This is going to replace a dual diverter valve plumbing assembly on your B&B RV Nautilus water control panel. On your screen, I am including the model numbers of those Nautilus panels that this is going to work with. And this does consist of two connected diverter valve T fittings equipped with half-inch MPT fittings. Of course, as you know, all plumbing connections sit behind the panel.

And the dual diverter assembly integrates directly with that panel. And this is the direct replacement from B&B, so you can trust that this is going to fit right in place of that original assembly. You're not gonna have to worry about compatibility issues, fitment issues, or anything like that. (assembly clacks) Well, that's gonna wrap up our real quick look today. I do hope that it was helpful for you.

Again, my name is Andy. Thank you for joining me.

Customer Satisfaction Score:

Ratings & Reviews

4.8

36 reviews
5 Stars
(30)
4 Stars
(5)
3 Stars
(1)
2 Stars
(0)
1 Star
(0)
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by:
I messed up when winterizing our 5th Wheel. On our first camp out for 2025, we had a major leak behind the Nautilus P4. Thought I would have to replace the whole wet bay. Researching the problem on etrailer.com found the exact part needed. Saving me a lot of money. Repair took 1 hr. If I had taken the camper to the dealer, it would have been tied up for weeks and probably cost 5 times more to fix. Thanks etrailer.com for having wide range of RV parts.
Ed profile picture

Ed

4/1/2026

Dual diverted replacement valve has been used for the past year with no issues. Part replaced the original exactly no modification needed. Etrailer saved me a camper load of money having replacement parts that RV owners can install themselves. Thanks.

by:
I received exactly what was ordered. Fast shipping and follow up from Etrailer. Thank you
by:
Exactly what was needed , quick shipping . Thank you
by:
Works like original
by:
Saw no reason I had to buy both top valves when only one was faulty. Found price crazy for what it is. With all the videos on Youtube about changing these out it is obvious that they lack quality.
by:
Thus was exactly what I needed on my nautilus p3 system
by:
Part was shipped in appropriate packaging and arrived almost on time.
Naomi from the order desk was amazing
by:
The part has been put in, and is doing what it is supposed to do. That would be a great rating from me.winter weather took it out, but looks like it is holding up to this winter just fine. I will order again from Etraoler.
by:
Very easy to install. The RV repair man said I had to replace the whole system, saved over $1000 doing it myself.
by:
Your service was great will definitely share with friends.
by:
Perfect fit got my water system back up and running
by:
worked great
by:
it was the perfect match. Easy to install. Took me about 10 minutes to install with the lines hooked back up and water running.
by:
Perfect replacement. Got me up and running. Awesome service.
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Great customer service
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Great
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Exactly what I needed
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Do you have a question about this Accessories and Part?
  • Availability Of Replacement Parts For Nautilus Panel On 2021 Grand Design Momentum 397TH
    Hello Michael, thanks for reaching out. The Replacement Dual Diverter Valve Assembly # BM88GR is for the P3 and P4 Panels, so if this is what you have, you can be sure the valve assembly will work. We carry the complete Nautilus P4 panels like part # BM54GR. We do have a few various replacement parts for them also, so if there is something specific you are looking for just let me know. Depending how many replacement parts you are needing, it might make more sense to just get a whole new...
    view full answer...

Info for this part was:

Employee Wilson B
Updated by:
Wilson B
Employee Michael B
Updated by:
Michael B
Employee Amanda M
Edited by:
Amanda M
Employee Andy C
Installed by:
Andy C
Employee Cody B
Written by:
Cody B

At etrailer we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.



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