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A designer may specify one of 2 types of backflow prevention devices. First, the Double-Check Valve Assembly. This is often shortened to DC and is typically thought of as the appropriate solution for low hazard conditions. Second, the Reduced Pressure Zone Valve Assembly, often shortened to RP or RPZ, is thought of as the appropriate solution for high hazard conditions.

Where areRPZ valvesrequired

EasyFloor is a unique method of constructing in-floor hydronic heat panels (radiant floors) that are designed to deliver radiant warmth to homes or buildings. The system is easy to install and provides impressive operating efficiency and even heat distribution throughout a room.

Radiant floor heating is ideal for adding safe, low cost warmth to your kitchen, family room, basement, or virtually any other flooring area in your home. Gentle, even heat distribution warms your floor and adds comfort to the room. Because it is an electric floor heating system, there are no hot water pipes to worry about or thick electrical cables to bury in cement or the worry about raising your floor. Our radiant floor heating elements are revolutionary and have been the result of over a 30 year blend of unique radiant floor heating science and floor heating patented technology. If you can walk across it, you can affordably heat it!

RPZvalve Diagram

Radiant heat systems traditionally come with a higher initial cost, but the efficiency benefits that the heat provides  may reduce your overall heating costs throughout the year.

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Unlike many conventional heating systems, radiant floor systems do not blow allergens into your home, nor do they require frequent maintenance and cleaning.

RPZValve price

The Double-Check Assembly (Figure 1) was developed in the 1950s for the fire industry. Any time the pressure on the property (downstream) side exceeds the pressure on the city (public) side, the two redundant check valves close stopping the backwards water flow. There are two problems with the Double-Check backflow preventer. First, no remedy exists in the event of a malfunction of the valve closures or if debris in the water line causes the valves to not close completely. Second, and this is the big problem, there is no way to know when such a failure has occurred without conducting a full test by a qualified professional.  The Double-Check is a closed system. It has no method of revealing whether the internal check valves are functioning properly and no way to detect the presence of debris that is impeding full closure.

RPZBackflow Preventer

Our Electric utilize flat ribbon alloy technology to create a sense of natural warmth. These mats can be used under a variety of floor types including stone, marble, tile, laminate flooring, and an endless possibility of other materials.

A properly constructed radiant heating system utilizes a thermal mass to store and release energy into the room. generally, this mass is stone or a concrete type material that can retain radiant energy. Radiant systems without a thermal mass are inherently less efficient.

The Reduced Pressure Zone Valve Assembly (Figure 2) consists of two independently operating check valves just like the Double-Check as well as a hydraulically operated differential relief valve located below the first check valve.

Many people have the misconception that radiant floors must feel ‘hot’ in order to do an effective job in ‘heating’ a building.  Remember, however, radiant heat is not about heating the building but about ‘warming’ the objects in a building (the floor, the counter top, the kids, cat and carpet).  If the floor feels ‘hot’, it is too warm and will feel uncomfortable to the people in the building.  Ideally, the temperature of the floor in a properly managed radiant system is less than 80 degrees – a temperature that the human body senses is not too hot or too cold – just right.  So, when the thermostat calls for heat, the floor is brought up to around 80 degrees and radiant energy is released from the floor into the room.

The EasyFloor System is designed to work with a variety of heat sources depending on fuel preference and availability, BTU requirements, local building code requirements, and personal preference.  Heat sources can include ‘upper end’ hot water heaters and boilers fired by natural gas, propane gas, electricity and wood in addition to geothermal and solar systems.

RPZvalve how it works

The system is is easy to install, making it an ideal choice for either the Do-it-Yourself installer, or for professional contractors.

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Elements within our home have been increasingly recognized as threats to respiratory health. Radiant heat does not use forced air or ductwork to spread allergens.

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EasyFloor can be installed by do-it-yourselfers.  It is possible for a reasonably skilled person familiar with construction techniques to install EasyFloor and connect the floor to the EasyPanel™ primary control panels available from the FloorHeat Company.  However, we recommend utilizing a qualified professional to install the heat source to system controls to insure proper installation and operation of the entire heating system.

Yes, in cases where construction indicates a poured concrete slab such as in a basement, the FloorHeat Company generally recommends that the PEX heat tubing be placed directly in the slab.  Operating in conjunction with the basement in-slab system, the EasyFloor can be used on sub-floors and slab surfaces not equipped with in-slab tubing.  Also, in cases where there is extreme heat load in a room, baseboard radiant heat or heat coils may be used along with EasyFloor.  However, many times EasyFloor is used on top of slab on grade floors because EasyFloor is significantly more responsive than tubes in overly-thick concrete.

The FloorHeat Company will work with your HVAC contractor to help design a highly efficient air conditioning system to operate in conjunction with your EasyFloor system.  Typically, single story residences place the air conditioning air handler in the first floor attic or other suitable location and run flexible 6” ducts into the ceiling of each room – allowing the cool air to fall into the room.  For two story buildings, a high velocity air conditioning system that utilizes mini-ducts is an excellent choice.  FloorHeat can provide you information on both methods.

When a flow stop occurs, both check valves close. At that moment, the relief valve opens and evacuates the water between the valves. (Figure 3) Some think that this event defines the limit of how much water can ever flow from the RPZ into a drain. This is not so.

This system produces warm radiant heat by a series of pex tubing filled with hot water that travels safely under your floor. Ideal for entire homes, thissystem can be installed by the do-it-yourselfer or a professional.

EasyFloor is designed for a lifetime of care-free enjoyment.  The system is constructed from highest quality materials that should reasonably be expected to last for a very long time – aluminum reflective foil, modular plastic grid, galvanized steel heat reflector plate, and fiber cement thermal mass.  Of course, your heat source and control systems should be regularly inspected and maintained by heating professionals.

Radiant heating transfers radiant energy into a room, similar to the heat an active lightbulb provides around it. The sections of the EasyFloor System work together to release radiant energy to cooler objects in a room. The air itself is warmed as it comes into contact with the radiant floor and heated objects throughout the room.

These mats utilize flat ribbon alloy technology to create a sense of natural warmth. These mats can be used under a variety of floor types including stone, marble, tile, laminate flooring, and an endless possibility of other materials.

How do you determine hazard? The simple answer is that the purveyor determines it, but every jurisdiction is different. Every city has its own list of named examples for what constitutes the hazard threshold. Here is an example from Washington DC. They also stipulate that if the anticipated use, as you know it, is not named explicitly, then they reserve the right to make the decision during plans review. It’s also important to understand that you cannot, as a designer, over-protect the incoming water service. This means there is no penalty for providing the higher degree of protection.

This system produces warm radiant heat by a series of pex tubing filled with hot water that travels safely under your floor. Ideal for entire homes, this system can be installed by the do-it-yourselfer or a professional.

Watch the video below for an example of RPZ flooding and to see just how much water is discharged when a small amount of debris becomes lodged in the device.

Heat is maintained near the floor and in the furniture you sit in, not wasted up at the ceiling level. With no ductwork, there are no drafts.

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EasyFloor radiant floor is designed to work with many different kinds of floor covering – but when selecting floor covering, be sure to mention to your floor covering supplier that you will be utilizing in-floor radiant heating.  Most floor covering products have published ‘R’ factors which will determine their suitability for use with EasyFloor.  Please keep the following points in mind:

The FloorHeat Company provides the EasyFloor System to offer coherent, pre-engineered hydronic heating solutions to consumers, plumbing heating contractors, and builders.  The EasyFloor System is a collection of two products – our EasyFloor radiant floor and our custom-built EasyPanel distribution panels and manifolds.  While each product can be ordered separately, most customers prefer pre-designed and pre-tested solutions.  We don’t just supply ‘pieces and parts’, we provide in-floor hydronic radiant heat systems – at a price that is remarkably affordable.

Rpz valvesinstallation

We supply both hydronic and electric floor heating systems in a variety of sizes, making it easy for you to have your FloorHeat the way you want it.

FloorHeat’s EasyFloor Grid system is the most efficient radiant heat system on the market. The system is is easy to install, making it an ideal choice for either the Do-it-Yourself installer, or for professional contractors.

Consider a flow-stop situation, like one that might naturally occur at the end of the day (Figure 4). If you look closely, you can see that a small pebble has lodged in the #2 check valve. Now imagine some sort of back siphon event over night. Perhaps a nearby building fire leaches the water back with the draw of a fire hydrant; or a pump station fails; or a water main breaks. Because the #2 check valve is not closing, all the water that has been delivered to the building will continue to flow out the relief valve until the private lines are cleared. If this is a four story building, that’s a lot of water.

EasyFloor can be used in second and third floor installations without having to reinforce the floor joists. The weight is less than 5 pounds per square foot when using the backer board thermal mass.

The EasyFloor system goes directly on top of an existing slab or subfloor.  When installing EasyFloor over suspended sub-floors, screw backer through the grids to sub-floor (2 ¼” galvanized deck screws or backer screws) being careful not the screw through the tubing!  Over concrete slabs, secure the EasyFloor and thermal mass to the slab with TapCons or ram sets.  In certain applications, plywood decking can be used in place of the backer board – consult with the FloorHeat Company.

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The main thing to take away from this is that both backflow prevention device types perform the same function when they are operating properly, but only the RPZ is designed to protect the public water supply by disposing of any backwards-flowing water if any of the check valves or the relief valve fails.

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Incorporate practical comfort and elegance into your home. Flexible-film technology provides luxurious warmth under wood or laminate flooring. It is easy to install, energy efficient, and maintenance-free.

You’ve heard these phrases and acronyms repeatedly. If you are a designer, you feel sure that you are expected to know what they mean. Here’s a quick rundown on what they are and how they differ.

EasyFloor packages typically add only 1 ½ inches to your existing floor – 1” for the plastic grids and ½” for the thermal mass.  In new construction, this added height is usually accounted for by adding a second 2×4 to the bottom sill plate of walls.

Now consider a full failure of the #2 check valve, like one that might occur if the device is knocked out of round or has a mechanical failure. It’s essentially the same event with the exception that due to the larger valve opening, there is actually a higher flood rate. Now you have water flowing through the relief valve at full head pressure. Again, if this is a large or multi-story building, that’s a lot of water very fast.

While it is highly unlikely that your EasyFloor will develop leaks when properly installed, the good news is that because of the modular construction of EasyFloor, it is possible to get access to the problem area.  There is a 25 year warranty for the recommended Kitec® PEX-AL-PEX tubing included in EasyFloor.  If the leak was caused by failure of the tubing, the warranty covers the cost of repair of the system and repair to the structure and replacement of damaged floor covering.  Importantly, proper installation of the heat tubing means that the installation of tubing is designed as one or more ‘loops’ – each ‘loop’ a continuous tubing run without splice or joints from the manifold and returning back to the manifold.

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As a water company, our daily work centers on ensuring that those whom we serve have the water they need for a fair price, in the right quantity and quality.

Our Film panels incorporate practical comfort and elegance into your home. Flexible-film technology provides luxurious warmth under wood or laminate flooring. It is easy to install, energy efficient, and maintenance-free.

With the even distribution of hydronic radiant heat you can reduce your heating cost by up to 40% over conventional heating methods.

Have a question about a backflow preventer enclosure?Click the contact us button below and one of our experts will be able to help with your specific enclosure needs.

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Make sure that the valve that you close is not an isolation valve for the expansion tank otherwise your relief valve will start leaking. A heating mechanic ...

The EasyFloor tubing base module (‘grids’) can be cut to fit with a hand or jig saw or table saw equipped with a fine tooth blade. The ¼” backer board can be scored and snapped with a utility knife and the ½” backer board cut with circular saw equipped with a fiber cement blade.

This hydraulic valve and its placement makes the RPZ virtually fail-safe but it comes at a cost to the area around the device.