5-Loop Stainless Steel Radiant Heat Manifold Zoom

5-Loop Stainless Steel Radiant Heat Manifold


Brand: Rifeng

RHM05 has been discontinued.
Direct Replacement:
Brand: Bulldog



Number of Outlets: 5
PEX Size: 1/2"
Main Inlet Size: 1" FPT
Sub Inlet Size: 3/4"
Loop Thread: EK20
Temperature Range (F): 0°-185°F
Max Temp (F): 194°F
Material: Stainless Steel
Application: Heating
Fitting System Compatibility: PEX Compression
PEX-AL-PEX Compression
Tubing Compatibility: PEX-AL-PEX
Standards Met: CSA B137.5

Description for Rifeng RHM05


  • Flexible, modular and singular design system
  • Easy-to-assemble construction
  • Precise flow control and balancing
  • Fitting for both PEX and Multilayer Pipe
  • Control for the dominant heating systems like hydronic floor heating, fan coil heating or baseboard heating.
  • No Sealant or Teflon required
NOTE: Includes supply/return shut-off valves with temperature wells

This manifold requires (10) Loop Fitting Assemblies:

PEX Loop Fitting Assemblies Options
PEX-AL-PEX Loop Fitting Assemblies Options
Optional Installation Accessories:

Loop End Cap
  • MA-ACT: Thermal Actuator for Rifeng Manifolds
    If you want to use your manifold to heat multiple zones, you can purchase return side actuators that work along side thermostats. The actuators act as zone valves to allow you to use one manifold to control the temperature in different rooms independently.
Supply/Return Adapter Options

Note: Bleeder valves that come equipped with Rifeng Manifolds are 1" BSP Thread (manifold inlet) x 3/4" BSP Thread (outlet). If your application requires you to connect to a garden hose, you will need to purchase a Mr. PEX Manifold End Cap w/ Swivel Fill-Drain Valve separately which is 1" BSP x 3/4" Hose Thread

5-Loop Stainless Steel Radiant Heat Manifold


by PowerReviews

(based on 5 reviews)

Ratings Distribution

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of respondents would recommend this to a friend.

Reviewed by 5 customers

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Quality Product Great Price

By Dream Home Builder

from Stanwood Michigan

Verified Buyer



      Best Uses

        Comments about 5-Loop Stainless Steel Radiant Heat Manifold:

        These manifolds are great. I'm heating 4500sq ft. with 3 different Rifeng manifolds. Easy to use, and great quality. I highly recommend!!

        • Was this a gift?:
        • No

        Good Value for the money

        By Tom

        from Princeton, NJ

        Verified Buyer

        Comments about 5-Loop Stainless Steel Radiant Heat Manifold:

        I have used manifolds from Uponor and Embassy and thought I would give these a chance. They are good, but the many union fittings make it difficult to get a water tight seal. The temperature gages are in the way of being able to get a wrench on one of the union fitting. With rubber O rings and nylon type gaskets, I am concerned about long term durability.


        Solid units, work well

        By Snowman

        from Salt Lake City, Utah

        Verified Buyer

        Comments about 5-Loop Stainless Steel Radiant Heat Manifold:

        I purchased 4 of these (3, 5, 7, & 8 loops) and installed them myself. I am not a plumber, but managed to get them in without too much difficulty. Do be aware that they are large (much bigger then the old INFLOOR units I replaced), but that they seem to be about the same size as other brands with similar function. They also seem to be less expensive due to the stainless steel bodies rather than brass.

        The units are very solid in construction, and offer excellent bleed / flush ports, and also valves to isolate the unit completely. The also have thermo-wells which is a nice touch, but i noticed that the body of one of mine was loose on the stem so I would not be too dependent upon their accuracy.

        Do be sure to check the size of your PEX hydronic heat lines (mine are 3.8" so I had to buy those fittings - the default that come with them are 1/2". Also, if you are using 3/8" PEX loops, my plumber (who I had check my work), suggested not to throttle the flow valves back at all as the flow rates are so low that any impedance could cause improper heating. He also pointed out that the manifolds themselves will distribute the flow well due to their large volume so throttling should not be necessary anyway.

        You should also be sure to use a 1" male brass fitting on each of the inlets and outlets (actually the valve body) as I was unable to get seals with copper fittings (maybe just me - again I am not a plumber, but the brass units worked perfectly first time).

        You should also be aware that the valve end of the manifold is a bit fiddly when it comes to leak stoppage as you have a sequence of a rubber seal, nylon seal and pipe thread all in just a few inches - but I did get them all to seal and I am sure better plumbers than I will do it without worry. You will need two large crescent wrenches (or a crescent and a pipe wrench) to tighten up this bit if you care about the final position of the valve handle and thermo-well (tough to explain - you will see what I mean when you do it yourself).

        I did have one fault on the 7 loop unit, and that was a very slow leak around the seal on the flowmeter. PEX Supply replaced the unit without question and the replacement works fine.

        Overall- good product, I only market the unit down due to the one leaking flow meter (which required removing the whole unit from a very tight opening in a wall cavity in my home), and the unreliable thermo-well.


        Great product for the money, all i use

        By Advance Services

        from Hudson, Ny

        Verified Buyer

        Comments about 5-Loop Stainless Steel Radiant Heat Manifold:

        Good quality stainless steel manifold. Easy to install and use. Very serviceable


        I have standarized on these manifolds

        By Randy the Hydronics guy

        from Chapel Hill, NC

        Verified Buyer

        Comments about 5-Loop Stainless Steel Radiant Heat Manifold:

        Given that these flowmeter equipped manifolds have a maximum per-circuit limitation of 1/2gpm, they are an excellent value and look great! My only wish is that they made the same thing with bigger flowmeters so I could use them as Zone controlers on my main hydronic control boards.

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        Q&A: Ask the Questions, share answers

        Do you have questions about this product?

        get answers from real customers and in-house experts with AnswerBox.

        3 Questions | 6 Answers
        Displaying questions 1-3
        • 5-Loop Stainless Steel Radiant Heat Manifold


          On a 5 circut manifold can I run 2 gal. min through each circut?
          What is the flow rate range on the meters?
          Asked on 7/18/2012 by solar from Wi.

          3 answers

          • CUSTOMER CARE


            Each circuit can handle a maximum of 1.6 GPM.

            Answered on 7/24/2012 by PexSupply Staff from NY
          • VERIFIED BUYER


            I simply used a single zone, variable speed pump brand "G". I opened up all
            the flow meters to the max and it easily heats my 1200 sqft home with hard
            wood radiant floor.

            Answered on 7/23/2012 by Anonymous
          • VERIFIED BUYER


            The answer depends on three factors;
            (1) The pipe size connected to the Five circuit manifold
            (2) Circuit length
            (3) Density of the fluid (ie if antifreeze is used the density is higher as is viscosity)
            In general if you are using 1/2 circuit tubing most systems will circulate at any where from .25 to 1.25 gpm per circuit.  Pushing this to 2 gpm per circuit takes a lot of pump power and most manifold flow indicators max out at 1.3 gpm.  
            Higher flow rates above 1 gpm are possible when using 5/8 and 3/4 inch pex tube for circuits but manifolds for this size are typically set up with mini ball valves on a copper "T" drilled manifold and likely only come into use on snowmelt and large warehouse applications  which may use longer tube lengths and larger pipe sizes to accommodate the pressure drop created by the increased length.
            Hope this helps. 

            Answered on 7/20/2012 by Anonymous
        • 5-Loop Stainless Steel Radiant Heat Manifold


          In the description we see
          •Fitting for both PEX and Multilayer Pipe

          Does I mean that the fitting are include? are do I need to get some Rifeng MA-50P (for 1/2 pex)

          Asked on 2/7/2012 by Anonymous

          1 answer

          • CUSTOMER CARE


            The fittings are not included with the manifold, unless you get one of the packages that comes with the fittings. For 1/2" PEX, this package is part number RHM05-50PK. It includes ten MA-50P fittings (one for each supply and return).

            Answered on 2/7/2012 by PexSupply Staff from NY
        • 5-Loop Stainless Steel Radiant Heat Manifold


          What is the distance between the supply and return valves? (inches on center)
          Asked on 2/18/2011 by cory from corry, pa

          2 answers

          • CUSTOMER CARE


            The distance between those valves measures approximately 8 inches (203 mm).

            Answered on 2/18/2011 by PexSupply Staff from NY
          • VERIFIED BUYER


            If I understand you correctly, you are asking about the distance between the horizontal centerline between the main Supply and Return manifolds rather than the vertical center to center distance between individual circuit outlets. I'll go up to the shop next week to review this, but my memory is that it's about 8". The manifolds are also offset relative to the rear plane to which the manifold hangers would be attached so as to enable the upper manifold to easily receive piping behind the lower manifold. That offset of the lower manifold is about 1 1/2".

            Answered on 9/8/2011 by Randy the Hydronics guy from Chapel Hill, NC
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