Water heaters have come a long way, from bulky tanks taking up valuable real estate in basements to sleek tankless units that deliver hot water on demand. And with innovation in heaters comes an evolution in their complementary components: the valve kits. This guide will dive into tankless water heater valve kits, elucidating their importance, components, and benefits to your water heating system.

My other idea is to create areas on an area plan for each loop and then describe if it is a "single wall serpentine" ("or counter flow tubing layout") and if it has 6", 12" etc. tube spacing. and then have some details as example how that looks like.

I attached a picture how the loops look like in schematic and they would need to be more detailed to go around obstacles etc.

We placed a couple of runs with U returns, then arrayed the system together. Not as worried about maintaining the connected systems, although you could do this by placing the returns first, then adding the piping between the returns using the grips. There just isn't a super fast way to do this...yet...

The only solution I came across to use a software like LoopCAD  and lay out the loops there and then export as dwg and link it in my model. Disadvantage is that it requires forth-back exporting and buying of a software. I tried the demo and it also doesn't lay out the way I want it (I want to lay it out so that in the future one could cut into the floor and only loses one loop)

WattsBackflow Preventer

Wish I was better at writing code....hey, if you're doing HVAC layouts, you might want to check out HVAC Solutions, they were working on a new plug in that links the 1D system to the actual duct layout...not sure how far they've gotten...

There doesn't seem to be an addin or some other Revit function. Using lines and drawing it out also isn't an option.... unless I wanted to spend the rest of my life doing that for one project.

There is no way I can create my own Revit family or addin to do the same thing. It would be nice to do in Revit, but this may be one of the examples where an external software is needed. So I decided to just buy that software, even for the one project it will save me more time than it costs. The manufacturer offers a free design software, but without graphic layout.

I see what you are saying, but using conduit still would require me to literally draw each foot of radaint tubing. I guess uisng annotation lines woudl be similar effort.

You mean the coordiantion with all the stuff in the flooring (trench trains, man holes, floor boxes..)? What I try is to export a dwg from Revit with all the obstacles and import in LoopCAD. Then lay out loops around those obstacles, export as dwg and link back to Revit.

The problem will be when you add something in Revit (i.e. new floor boxes), then you have to do that over and adjust the loops. There still will be some field coordination for the exact locations or floor items... but the bid-package layout should then already be 99% correct.

I'm not sure if electrical cables will really help since they don't create the loops for radiant heating (the serpentine loops etc.). they would be like normal lines for that purpose. the same I'm also not sure how to create a family smart enough to make loops.

3/4pex check valve

I am not sure. May be you can use electrical cables I believe. I can understand it wont make sense to add an electrical tool. But that is what we can do if we need it modeled.The other way is creating your own family of radiant floor. That will make more sense. If you are good in family creation it will be bit easy...!Let me know if it works..!

Alternatively I can create an example layout of each method and use areas to show where what layout whoud be used where. but this will still equire an acutal layout plan for the installer.

Yeah, we usually just cheat with radiant floor systems and draw model lines for the tubing...but try out the stuff from Metraflex:

The problem will be when you add something in Revit (i.e. new floor boxes), then you have to do that over and adjust the loops. There still will be some field coordination for the exact locations or floor items... but the bid-package layout should then already be 99% correct.

they ahve some fittings we used to do the loops on another model. We also modeled the headers from scratch, was easier to do and reuse that way.

I played a bit more with the LoopCAD software and it actually is a nice layout software and also calculates the flowrates, dT, pressure drop etc. I was able to do some fake-layout, export as dwg and link into my Revit project (s. attached screenshot from Revit) where it will tell exactly how to route what loop, how long it is etc.

for the actual design (determining spacing, flow rate etc. ) I use a manufacturer software. So all I need is a tool or method to visualize to contractor where to use what spacing, layout and what loop goes to what manifold. somehow being able to schedule total tubing would be great too.

Hot water backflow preventer

I think most designs rely on manufacturer layout. The danger is that layout may be done cheaper (fewer loops. wider spacing) than I'm comfortable with. and from my research with tubing manufacturers I concluded they will charge for the layout either by ft² or as % of material cost. So me providing detailed layout should save money somewhere. (no, I don't mean to advertise products)

What i was looking for is more an automated way. In a 20,000 ft²  space with 12" o.c. tubing in several dozen separate loops it owudl be hard to manually draw them.

I'm designing a project with in-floor radiant heating tubes. Is there a good way to show the looping (spacing at different locations, loop lengths, type of layout like "serpentine")?

Thanks. I downloaded their families and tried one of their fittings... but either I didn't pick the right one, or do it wrong. It doesn't seem toget me a loop.

3/4inch check valve pvc

We can use the purge port to diagnose and testing of the water heater. Diagnostic & testing include flow rate, firing rate, and temperature testing. We should keep in mind that all testing must be done in accordance with manufacturers’ recommendations.

I want to thank you all for the input. Even if I don't implement your solutions, it helped me making a (hopefully good) decision.

Tankless water heater valve kits might seem like just another component in your water heating setup, but they play a pivotal role in ensuring that the system runs efficiently safely, and has a long operational life. If you’re investing in a tankless water heater, ensure you have a compatible valve kit installed – it’s a small step that promises substantial returns in efficiency, safety, and peace of mind.

Tankless water heater valve kits simplify installation, fitting, maintenance, and operation. They substitute a huge arrangement of tankless installation. Up to 18 fittings and 16 connections are used in usual tankless installations. Tankless water heater valve kits combine two valve sets or a single valve. There are female threaded, union, or quick-connect end options also. Sometimes, we can find few models with or without a relief valve.

Perhaps you can create an In-Place model with as a Sweep Extrusion and an Electrical Connector (if desired). Using such a method, you can easily draw the Sketch Path in the serpentine shape and then apply a circular Profile. This will be pretty easy to modify later, if needed.

You mean the coordiantion with all the stuff in the flooring (trench trains, man holes, floor boxes..)? What I try is to export a dwg from Revit with all the obstacles and import in LoopCAD. Then lay out loops around those obstacles, export as dwg and link back to Revit.

A more elaborate solution would be to create a parametric Family (which you could NOT assign to a system Category such as Conduits) that can be reused in other Projects. Such a Family could also be as simple as a Detail Item Family so you don't bulk up your file size by physically modeling all of the loops.

thanks for bringing up here...we had also used the ACAD dwg to plan view method when we first started doing these, but long term, I think it needs to be a system, so it can be accounted for, and coordinated for interferences...we really don't want to core drill through a radiant line...

3/4check valve

At the time of servicing the tankless water heater, hot water may cause injury or property damage. We should be more cautious about this.

First and foremost, let’s understand the marvel of the tankless water heater. Unlike traditional water heaters that store and heat water in a tank, tankless (or on-demand) heaters heat water directly as it passes through the unit. This means no waiting for a tank to fill up and, more importantly, no wastage of energy to keep stored water hot.

absolutely - sounds like we did the same thing...I'd like a plug in as well, and make it a combo with a large fry and medium Diet Coke (grin)...

We should fix the pressure relief valve to the hot water isolation valve before attaching any components to the tankless water heater. There is a caution & we should follow it strictly. We shouldn’t over-tighten the relief valve. We can tighten a maximum of 2 turns past hand tight.