Choosing the best PEX shower tub valve kit starts with matching the valve to your plumbing, trim, and shower setup. These three options differ in important ways: one is a Moen Posi-Temp valve with 1/2-inch crimp-ring PEX connections, while the other two are rough-in valve bodies that require compatible trim. Check the connection type and included parts before buying, especially if the valve will be hidden behind a finished wall.
Table of Contents
Quick Comparison
| Product | PEX connection details | Best suited for | Key limitation |
|---|---|---|---|
| Moen 8373HD Commercial Posi-Temp Shower Valve | 1/2-inch crimp-ring PEX | A Moen Posi-Temp setup with pressure balancing | Confirm whether you also need a separate trim kit |
| TOVEN-RV R10000-UNBX MultiChoice Rough-In Valve | Universal 1/2-inch connections; supports PEX tubing or adapters | A compatible Delta trim system and flexible pipe connections | Valve body only; cartridge and trim are not included |
| Delta DR10000PFTPX PEX Crimp Rough-In Valve | 1/2-inch PEX crimp | A Delta MultiChoice installation using PEX crimp connections | Valve body only; verify trim compatibility |
Our Picks: Best Pex Shower Tub Valve Kit reviews
Moen 8373HD: Posi-Temp Valve with PEX Crimp Connections
The Moen 8373HD is a single-handle Posi-Temp shower valve designed for 1/2-inch crimp-ring PEX connections. Its pressure-balancing control is intended to help maintain water temperature when water pressure changes, a useful feature in a busy household. The valve has four ports and a brass cartridge.
This is the most straightforward choice here if your project calls for the Moen Posi-Temp system and your plumbing uses compatible crimp-ring PEX. Its brand-specific design is also a practical reason to choose it when matching an existing Moen setup. The listed product information does not spell out whether a trim kit is included, so check the package details before ordering.
Compared with the two rough-in bodies below, the Moen listing highlights its Posi-Temp control and cartridge rather than broad compatibility with multiple trim families. That makes it a more focused option, but it also means you should confirm that your handle and trim are made for this valve.
Pros:
- Uses 1/2-inch crimp-ring PEX connections
- Pressure-balancing Posi-Temp control helps manage temperature changes
- Includes a brass single-handle tub/shower cartridge
- Backed by Moen’s Limited Lifetime Warranty, according to the product details
Cons:
- Designed for the Moen Posi-Temp system, so trim compatibility matters
- The listed details do not confirm whether a trim kit is included
Verdict: Choose the Moen 8373HD if you want a Posi-Temp valve with 1/2-inch crimp PEX connections and have verified that your trim matches.
TOVEN-RV R10000-UNBX: Flexible Connections for Delta Trim
This R10000-UNBX-style rough-in valve body is made to work with compatible Delta MultiChoice trim in the 13/14, 17, and 17T series. Its four 1/2-inch universal connections are described as accommodating copper, iron pipe, PEX tubing, or CPVC piping adapters. That connection flexibility may help when a remodel involves existing plumbing that does not match one simple pipe type.
The product is made from forged brass and includes a pressure-test plug and mounting brackets, according to its description. Those details are useful during rough-in work: the plug supports line testing before the final cartridge and trim go in, while the brackets are intended to secure the valve at the studs. The listing specifies a 1-year warranty.
There is an important distinction between this valve and a complete shower tub kit: the cartridge and outer trim are not included. Also, the description mentions PEX tubing or adapters, so confirm the exact connection method and any needed fittings with your installer rather than assuming every PEX connection part is in the box. Its appeal is strongest for a Delta-compatible project where connection flexibility is a priority.
Pros:
- Designed for compatible Delta 13/14, 17, and 17T series trim
- Four 1/2-inch connections support several pipe types
- Includes a pressure-test plug and mounting brackets, per the listing
- Forged-brass body
Cons:
- Cartridge and outer trim are not included
- Confirm whether your PEX setup needs separate adapters or fittings
Verdict: Consider this valve body if you are building a compatible Delta MultiChoice system and want several connection options, but budget separately for the cartridge, trim, and any required fittings.
Delta DR10000PFTPX: A PEX Crimp Rough-In Valve Body
The Delta DR10000PFTPX is a MultiChoice universal valve body for a tub-and-shower rough-in, with a 1/2-inch PEX crimp connection style indicated in its product name. The supplied product details identify it as a valve body only. This makes it a focused option for projects where the plumbing plan calls for PEX crimp connections and the finished trim will be selected separately.
Unlike the TOVEN-RV option, the Delta listing does not provide a detailed breakdown of additional connection types or included installation parts. Its main advantage in this comparison is the clearly identified PEX crimp format and Delta MultiChoice platform. Before buying, confirm the trim and cartridge requirements for your chosen setup, as well as whether the package includes anything beyond the valve body.
This is not the best choice if you need a complete ready-to-finish kit or want several different pipe connection options. It can make sense when you already know you need a Delta-compatible rough-in body with PEX crimp connections.
Pros:
- Identified as a 1/2-inch PEX crimp tub-and-shower rough-in valve
- Uses the Delta MultiChoice valve platform
- Useful for a project where trim is being chosen separately
Cons:
- The supplied details describe a valve body only
- Product information provides fewer connection and included-parts details than the other options
Verdict: Pick the Delta DR10000PFTPX when your plan specifically calls for a Delta MultiChoice rough-in body with 1/2-inch PEX crimp connections, and verify the required trim and cartridge before ordering.
How to Choose a PEX Shower Tub Valve Kit
Match the valve to your PEX connection method
“PEX connection” does not always mean the same thing from one valve to another. The Moen 8373HD specifies 1/2-inch crimp-ring PEX connections, and the Delta DR10000PFTPX is identified as a 1/2-inch PEX crimp valve. The TOVEN-RV listing describes universal connections that can accommodate PEX tubing or adapters. Match the valve to the fittings and tools your plumbing plan requires, and ask a plumber if you are unsure.
Check trim and cartridge compatibility
A rough-in valve sits behind the wall, so it needs to match the handle, cartridge, and trim that will be installed later. The TOVEN-RV is described as compatible with Delta 13/14, 17, and 17T series trim. The Moen is a Posi-Temp valve. Do not assume trim from one brand or valve family will fit another; confirm compatibility before the wall is closed.
Know what is included
Some listings are for a valve body rather than a complete tub-and-shower package. The TOVEN-RV description clearly states that its cartridge and outer trim kit are not included, and the Delta listing identifies its product as a valve body only. The Moen details mention a brass cartridge but do not establish whether trim is included. Check the package contents and plan for any missing pieces.
Choose the control style for your needs
The Moen uses Posi-Temp pressure-balancing control, which is intended to help maintain water temperature when pressure changes. The supplied descriptions for the two rough-in valve bodies focus more on their platform and connections. If temperature control is a deciding factor, compare the finished valve system and trim specifications, not just the pipe connections.
Plan for access, mounting, and testing
Because a rough-in valve is installed before the wall is finished, position and secure it according to the installation instructions and the planned trim depth. The TOVEN-RV listing notes included mounting brackets and a pressure-test plug. For any option, test the plumbing for leaks before closing the wall, and have a qualified plumber handle installation if you are not experienced with water-supply connections.
Frequently Asked Questions
What is a PEX shower tub valve kit?
It is a shower or tub-and-shower valve setup designed to connect with PEX plumbing. Depending on the product, the package may include a valve and cartridge, or it may be only a rough-in valve body. Check the product details to see whether trim and other parts are included.
Are these three valves interchangeable?
No. The Moen is a Posi-Temp valve, while the other two are associated with the Delta MultiChoice platform. Valve, cartridge, and trim compatibility varies by system, so match the rough-in body to the specific trim you plan to use.
Which option specifically lists 1/2-inch crimp-ring PEX?
The Moen 8373HD specifies 1/2-inch crimp-ring PEX connections. The Delta DR10000PFTPX is also identified as a 1/2-inch PEX crimp rough-in valve. The TOVEN-RV listing describes universal connections that accommodate PEX tubing or adapters.
Do the rough-in valve bodies include a trim kit?
The TOVEN-RV listing says its cartridge and outer trim kit are not included. The Delta product is described as a valve body only. Check the current package details for the exact contents before purchasing.
Can I install a new trim kit on an existing valve?
Only if the trim is compatible with the valve body and cartridge already in the wall. Identify the valve brand and model before ordering. If you cannot confirm the model, a plumbing professional may be able to help identify it.
Should I install the valve myself?
That depends on your plumbing experience and local requirements. Incorrect connections can cause leaks behind the wall, so use the manufacturer’s installation instructions and test the lines before finishing the wall. Hire a qualified plumber if you are not confident in the work.
Final Recommendation
For a focused Posi-Temp installation with 1/2-inch crimp-ring PEX, the Moen 8373HD is the clearest match in this group. Choose the TOVEN-RV if you need a Delta-compatible rough-in body with broader connection options, and consider the Delta DR10000PFTPX when your project calls for a Delta MultiChoice body with PEX crimp connections. In every case, confirm trim, cartridge, and included parts before the valve goes behind the wall.
