Delta®

MultiChoice® Universal Tub / Shower Rough - PEX Cold Expansion

Model#: R10000-MFWS
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Delta®
MultiChoice® Universal Tub / Shower Rough - PEX Cold Expansion
Model#: R10000-MFWS
List Price: $12150
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Find local Delta® installers.
PRODUCT FEATURES
This rough-in kit may be installed prior to choosing the specific trim and finish. Allows for construction or a renovation project to proceed without delays when narrowing down a design style. Trim kit is sold separately and is required to complete the unit. Save time, effort, and money on future renovation updates because there’s no need to alter plumbing behind the wall.
  • MultiChoice® Universal valve body rough-in kit only
  • Must purchase trim kit to complete the unit
  • Forged brass body
  • Accepts single, dual, or dual thermostatic cartridge
  • Cartridge ships with trim
  • Back-to-back installation capability
  • PEX cold expansion with stops, with UN Outlets
  • 1/2 in. outlets and connections
Special Information
Warning Image
California Prop 65 WARNING
Technology and Special Features
MultiChoice® Universal Valve
Special Information
Warning Image
California Prop 65 WARNING
Documents & Specs
Product Support, Repair Parts & Technical Specifications
View Technical Specifications
View Maintenance & Installation Sheet
View Parts & Accessories Diagram
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Installation Information
Connection Type :
Universal fittings
Overall Height (in.) :
4
Valve Type:
NA

INSTALLATION SUPPORT

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REVIEWS
Rated 5 out of 5 by from Great Valve & Value [This review was collected as part of a promotion.] Delta is always a reliable choice with easy to coordinate parts.
Date published: 2025-11-14
Rated 5 out of 5 by from Works well. Super happy with it
Date published: 2025-09-17
Rated 5 out of 5 by from High quality, easy install, lots of trim options Not much to say other than it seems to be very well made and robust. I bought this particular variant for the expansion PEX inlet fittings... I just wish the shower outlet was also PEX since that's what I'm using (PEX up to a brass drop ear elbow). So that was one more adapter fitting to buy, but no big deal. I understand why they make that one universal copper/steel. And of course, you shouldn't use PEX for the tub spout outlet, so no issues with lack of PEX connection there.
Date published: 2024-12-11
Rated 5 out of 5 by from ..... Smooth transaction
Date published: 2023-02-14
Rated 5 out of 5 by from Good install for quality product Contractor/plumber said this was an easy install for the pex pipes. They swear by Delta brand.
Date published: 2022-04-17
Rated 5 out of 5 by from Excellent support of the product line Warranty is the best in the business.
Date published: 2018-10-21
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Q&A

Pex inlet flow restriction...?

The inner dimension of the PEX inlets on these vale bodies are considerably smaller than any 1/2" cold expansion fitting I've seen (picture attached for reference). After referencing different pictures of these cold expansion PEX valve bodies, some versions show larger inner diameters on the inlets, while some are smaller. My questions/concerns: Wouldn't these inlets with a smaller ID restrict water flow? Can you please provide the actual Flow/GPM of this specific valve body with these small inlets? Are the inner diameters of the PEX inlets different between the WS and non-WS versions? Thank You
Asked by: Grizzle
Grizzle, Thank you for your question! There is no difference in inlet diameter between MF and MFWS or any other with and without stops roughs. The difference in the inlets between PEX (MF, PX) and other valve types (UN, IP, etc.) will not produce a noticeable change in the flow rate as the waterways through the cartridge are more restrictive. The cartridge determines the flow rate, so the maximum flow rate will be determined by the series of trim that you use. Here are the approximate flow rates for each series at 60 PSI: 14 series - 5.8 GPM 17 series - 5.9 GPM 17T series - 7.3 GPM Best regards, Jon
Answered by: DeltaFaucet3
Date published: 2024-03-28

Not completely understanding the different pex type of barb fittings, would the R1000-MF or the R1000-PX be the correct choice if my plumbing contractor uses Upinor Propex fittings for his installations? Is there a tech. sheet for fitting profiles?

Asked by: Captain T
Thank you for your question, Captain T! Both the R10000-MF (1/2" PEX cold expansion connections) and the R10000-PX (1/2" PEX Crimp connections) have 1/2" universal outlets with male threads. The difference on these models is solely in the connection for the Inlets. Both will feature universal 1/2" connections, however the R1000-PX will have slightly tapered inlets for easier installation. This would be up to the contractor to decide what methods best suit the installation needs. https://media.deltafaucet.com/MandI/50353%20Rev%20J.pdf https://media.deltafaucet.com/SpecSheet/DSP-B-R10000%20Rev%20J.pdf Best regards, Edward
Answered by: Delta Faucet
Date published: 2024-03-28

What is the flow rate of the R10000-MFWS as compared to the R10000-UNWSHF?

Asked by: fred
Hi Fred, Thank you for your question! Here is the flow rate comparison information.Regular R10000 (60PSI ) (80PSI) R10000-HF(60PSI) (80PSI) 13/14 6.3gpm 7.3gpm 7.3gpm 8.6gpm 17 5.6 gpm 6.4gpm 6.7gpm 7.8gpm 17T 7.0 gpm 8.0gpm 9.4gpm 10.7gpm Best regards, Brandis
Answered by: DeltaFaucet7
Date published: 2024-03-28

what is the difference between R10000 LBX and R10000 MFWS?

Asked by: Melba
Hello Melba! Thank you for your question regarding the Delta Faucet MultiChoice® Universal Tub / Shower Rough - PEX Cold Expansion MODEL#: R10000-MFWS! I do apologize that this information wasn't readily available but I am happy to help. The L in the LBX just means it's from Lowes and is the same as the Delta R10000-UNBX. The R10000-MFWS is manufactured to be used with PEX. Please reach out to us directly if you need further assistance. Thank you for being a loyal Delta Faucet customer. Best Regards, Antoine
Answered by: Delta Faucet
Date published: 2021-05-24

can the stops be installed for a pressure test ,if not what size plug for testing ,1/4 male plug does not fit

Asked by: ianmcc
Thank you for your question, ianmcc! The stops can be left installed during testing and can be closed 3 turns for the full open position without a noticeable reduction in flow. Best regards, Jon
Answered by: Delta Faucet
Date published: 2024-03-28

Difference between r100000-unbxj and r10000-ipws

I am planning a complete remodeling of a bathroom. Please advise on the differences between the two Universal and Shower Valve Body.
Asked by: reggie
Hi Reggie, In the abbreviation on the R10000-UNBX the UN stands for Universal connections on Inlets/outlets, BX is a single box model. The abbreviation in the R10000-IPWS the IP stands for iron pipe inlet/outlets and the ws means the rough valve comes with stops. This allows you to turn off the water flow right at the valve vs. turning of the water to the home.
Answered by: JessW
Date published: 2024-03-28

R10000-MFWS

What does the Pex Cold Expansion represent in this code and what would be the benefit of using this valve vs. the R10000-UNWS?
Asked by: Rep.
Hi Rep, Thank you for your question! The R10000-UNWS has 1/2" inlets for copper or iron pipe and would need an adapter to use PEX with with it. The R10000-MFWS is manufactured to be used with PEX. Best regards, Brandis
Answered by: DeltaFaucet7
Date published: 2024-03-28

I dont have tub, is there a part# to plug the lower port ?

Asked by: crg63
Hello Crg63, Thank you for your question! Unfortunaely, we do not manufacture any plugs for this valve. You can cap off the bottom port with your choice of 1/2" outlet pipe plug. The plug can be threaded or soldered. Best regards, Tanya
Answered by: Delta Faucet
Date published: 2024-03-28
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PART LIST

PART LIST

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* Actual pricing may vary and is determined by the selling retailer/wholesaler/dealer.