ii)where a potentially severe health hazard may be caused by backflow, by a reduced pressure principle backflow preventer conforming to CAN/CSA-B64.4.1, “Backflow Preventers, Reduced Pressure Principle Type for Fire Systems (RPF).”

1) A check valve shall be installed at the building end of a water service pipe where the pipe is made of plastic that is suitable for cold water use only.

2) Every air gap shall be not less than 25 mm high and at least twice the diameter of the opening of the water supply outlet in height.

d)Class 1, Class 2 and Class 3 fire sprinkler/standpipe systems in which antifreeze or other additives are used shall be protected by a reduced pressure principle backflow preventer conforming to CAN/CSA-B64.4.1, “Backflow Preventers, Reduced Pressure Principle Type for Fire Systems (RPF),” installed on the portion of the system that uses the additives and the balance of the system shall be protected as required by Clauses (b) or (c),

Are you worried that you will have to constantly set your circulator pump? Not at all, the pump self-adjusts and optimizes its operation. The Grundfos smart circulator responds very well to actual demand, it will provide you with hot water immediately without waiting for it at the tap or in the shower. This not only increases your comfort, but also reduces your water waste greatly.

b)be rigid, slope downward from the valve, and terminate with an indirect connection above a floor drain, sump, or other safe location, with an air break of not more than 300 mm,

1) Every flushing device that serves a water closet or one or more urinals shall have sufficient capacity and be adjusted to deliver at each operation a volume of water that will thoroughly flush the fixture or fixtures that it serves.

Circulator pumps provide mainly water circulation in heating systems with radiators, central, and also in underfloor heating. It is also possible to use the pumps for the circulation of hot water in the house water supply system. Simply put, the circulator pump ensures the transport of hot water from the boiler to the radiators, or even to the water mains. There are basically two types of pumps: old three-speed / three-stage and modern electric pumps.

iv)a curb stop and a means of draining that part of the pipe located above the frost line when not in use.

Improperly selected circulator pump can cause heating discomfort, uneven heating, high energy consumption and a lack or excess of hot water. If you wish to have efficient, economical, low-energy and ecological heating, picking a suitable circulator pump is crucial.

a)residential partial flow-through fire sprinkler/standpipe systems in which the pipes and fittings are constructed of potable water system materials shall be protected by a dual check valve backflow preventer conforming to CAN/CSA-B64.6.1, “Backflow Preventers, Dual Check Valve Type for Fire Systems (DuCF),”

1) Where the static pressure at any fixture may exceed 550 kPa, a pressure-reducing valve shall be installed to limit the maximum static pressure at the fixture to 550 kPa.

4) Where a reduced pressure principle backflow preventer is required on a water service pipe at a fire service connection located on the same premises as the fire service pipe in Class 3, 4, 5 and 6 fire sprinkler/standpipe systems, a reduced pressure principle backflow preventer conforming to CAN/CSA-B64.4.1, “Backflow Preventers, Reduced Pressure Principle Type for Fire Systems (RPF),” shall also be required on the fire service connection.

1) Every pipe that passes through an exterior wall to supply water to the exterior of the building shall be provided with

4) A pressure vacuum breaker shall be installed so that the critical level is not less than 300 mm above

1) In addition to the backflow preventer required by this Subsection for buildings or facilities where a potentially severe health hazard may be caused by backflow, the potable water system shall be provided with premise isolation by the installation of a reduced pressure principle backflow preventer. (See Appendix A.)

1) Potable water connections to fixtures, tanks, vats, boilers or other devices containing other than potable water and subject to pressure above atmospheric shall be arranged to prevent backflow caused by back pressure in conformance with Sentences (2) and (3).

c)0.9 metres/sec for hot water distribution systems and recirculating systems with operating temperatures exceeding 60°C.

1) Every water distribution system shall be designed to provide peak demand flow when the flow pressures at the supply openings conform to Table 7.6.3.1

2) Where an atmospheric vacuum breaker is installed, it shall be located on the downstream side of the fixture control valve or faucet so that it will be subject to water supply pressure

5) A tail piece or connector not more than 750 mm long and not less than 0.25 inch inside diameter may be used to supply water to a fixture.

4) For one and two family dwellings, the size of a water distribution system shall be determined by Table 7.6.3.3..

Modern circulators are characterized by quiet operation, small size and a simple design that ensures minimal failure and easy repair.

3) Where fixtures are supplied with both hot and cold water, the hydraulic loads for maximum separate demands shall be 75% of the hydraulic load of the fixture units given in Table 7.6.3.1. and 7.6.3.2. when using a detailed engineering design method.

b)1.2 metres/sec for hot water distribution systems and recirculating systems with operating temperatures not exceeding 60°C, or

5) Every pipe that conveys water from a temperature-relief, pressure-relief or combined temperature- and pressure-relief valve shall

a)designed to open when the water pressure in the tank reaches the rated working pressure of the tank, and

i)a tamperproof terminal connection that is capable of being repeatedly connected, disconnected and sealed,

1) Potable water systems shall be designed, fabricated and installed in accordance with good engineering practice, such as that described in the ASHRAE Guide and Data Books, the ASHRAE Handbooks and ASPE Data Books. (See Appendix A.)

1) A water distribution system shall be installed so that the system can be drained or blown out with air.

A Grundfos pump with AUTOADAPT can save you up to 80-90% of heating energy consumption. Your total household energy bill can thus be reduced to a fraction and the return of investment for this pump is usually only a few years, sometimes even within a year.

1) A backflow preventer shall not be required in residential full flow-through fire sprinkler/standpipe systems in which the pipes and fittings are constructed of potable water system materials.

2) Every fixture supplied with separate hot and cold water controls shall have the hot water control on the left and the cold on the right.

2) Except as provided in Article 7.6.2.4., backflow caused by back pressure of non-toxic substances into a potable water system shall be prevented by the installation of

3) A pressure-relief valve and temperature-relief valve may be combined where Sentences (1) and (2) are complied with.

b)Class 1 fire sprinkler/standpipe systems shall be protected by a single check valve backflow preventer conforming to CAN/CSA-B64.9, “Backflow Preventers, Single Check Valve Type for Fire Systems (SCVAF),” provided that the systems do not use antifreeze or other additives of any kind and that all pipes and fittings are constructed of potable water system materials,

b)be designed to open and discharge sufficient water to keep the temperature of the water in the tank from exceeding 99°C under all operating conditions.

3) Backflow preventers shall be selected, installed, maintained and field tested in conformance with the Water Works By-Law.

1) Systems for solar heating of potable water shall be installed in conformance with CAN/CSA-F383, “Installation Code for Solar Domestic Hot Water Systems.”

3) Backflow caused by back pressure of toxic substances into a potable water system shall be prevented by the installation of

The pump with AUTOADAPT automatically evaluates which mode is ideal for a given system. In addition to constantly adapting to external conditions, such as the outside temperature and your consumption patterns, this pump regulates its operation and pressure based on your individual needs. As a result, you will enjoy optimal heating comfort at the minimal energy consumption.

1) Backflow caused by back-siphonage or back pressure from fire sprinkler systems where water treatment is not added shall be prevented by the installation of a double check valve assembly or an approved dual check valve when the building is sprinklered to NFPA 13D and a flow through system is installed.

3) In a hot water distribution system of a developed length of more than 30 m or supplying more than 4 storeys, the water temperature shall be maintained by

1) Provision shall be made to protect the water distribution system from the adverse effects of water hammer. (See Appendix A.)

Grundfos circulator pumps with the AUTOADAPT function are currently the best solution for cutting cost of heating. This intelligent and innovative function is a patent of Grundfos, which is why it is not found in any other circulator pump on the market. With 60 years of industry experience and millions of pumps sold, the Danish company Grundfos is a leader in its field and a guarantee of quality and innovation.

2) Every hot water tank of a storage-type service water heater shall be equipped with a temperature-relief valve with a temperature-sensing element

2) A water treatment device or apparatus shall not be installed unless it can be demonstrated that the device or apparatus will not introduce substances into the system that may endanger health.

1) No private water supply system shall be interconnected with a public water supply system.

1) Every water service pipe shall be provided with an accessible shut-off valve located as close as possible to where the water service pipe enters the building.

b) any group of fixtures in the same room, except as provided in Sentence (4).

i)by a double check valve backflow preventer conforming to CAN/CSA-B64.5.1, “Backflow Preventers, Double Check Valve Type for Fire Systems (DCVAF),” or

1) No bypass piping or other device capable of reducing the effectiveness of a backflow preventer shall be installed in a water supply system.

e)Class 4 and Class 5 fire sprinkler/standpipe systems shall be protected by a reduced pressure principle backflow preventer conforming to CAN/CSA-B64.4.1, “Backflow Preventers, Reduced Pressure Principle Type for Fire Systems (RPF),” or

1) Tank-type water closets shall be provided with a back-siphonage preventer in conformance with Sentence 7.2.10.10.(2).

1) Protection against thermal expansion shall be required when a check valve is required by Article 7.6.1.5., a backflow preventer by Article 7.6.2.6., or a pressure-reducing valve by Article 7.6.3.3. (See Appendix A.)

3) Backflow preventers required by Sentence (2) shall be installed upstream of the fire department pumper connection. (See Appendix A.)

7) Every pipe that supplies water to a hot water tank shall be provided with a shut-off valve located close to the tank.

3) Except as provided in Sentence (5), the size of a pipe that supplies a fixture or device shall conform to Table 7.6.3.1.

6) In buildings of other than residential occupancy, shut-off valves shall be provided on the water supply to

2) Except as provided in Sentence 7.6.2.10.(2), back-siphonage shall be prevented by the installation of

If your circulator pump has stopped working, you basically have two options: have it repaired or buy a new pump. Of course, the investment will be higher if you buy a new pump, but energy savings will pay you back many times over. Repairing an old circulator pump is thus in fact a much more expensive option. How is it possible?

1) A newly installed part of a potable water system shall be cleaned and then flushed with potable water before the system is put into operation.

1) Except as provided in Sentence (3), the hydraulic load of a fixture or device that is listed in Table 7.6.3.1. shall be the number of fixture units given in the Table.

4) Where fixtures for one and two family dwellings are supplied with both hot and cold water, the hydraulic loads for maximum separate demands for water distribution piping shall be not less than 100 per cent of the hydraulic load of the fixture units given in Table 7.6.3.1. (private use) or Table 7.6.3.2. (private use).

b)designed to open and discharge sufficient water from the tank to keep the temperature of the water in the tank from exceeding 99°C under all operating conditions.

1) Potable water connections to fixtures, tanks, vats or other devices not subject to pressure above atmospheric and containing other than potable water shall be installed so as to prevent back-siphonage in conformance with Sentence (2).

3) An atmospheric vacuum breaker shall be installed so that the critical level is at least the distance specified by the manufacturer at which the device will operate safely but not less than 150 mm above

3) Except for risers that serve only one dwelling unit, every riser shall be provided with a shut-off valve located at the source of supply.

To make a decision you will need to find out the volume of the heating system and water, the number of radiators or the area of the underfloor heating. Accordingly, select the required power, referred to as the maximum pressure head, and possibly the number of pumps. In order to install the pump correctly you must also know the pitch and diameter of the connecting threads.

We already know that the electric circulator pump is undisputably of a better quality, and more economical. But how not to get overwhelmed by the extended product range? Pick with regard to the technical parameters of the heated building. If you are getting a pump for a new building, you will find the necessary data in the construction documents. But if you are looking for a pump for an older building, you will need to determine the parameters yourself.

c)have a drain that is located directly under the relief valve discharge pipe and that discharges directly to a floor drain or other acceptable location.

7) No shut-off valve shall be installed on the pipe between any tank and the relief valves or on the discharge lines from such relief valves.

1) Where the critical level is not marked on an atmospheric vacuum breaker or pressure vacuum breaker, the critical level shall be taken as the lowest point on the device.

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2) For one and two family dwellings, the size of a water service pipe that supplies a fixture or device shall be determined by Table 7.6.3.3., but shall not be less than 3/4 in.

Equally significant is the lower impact of a modern pump with AUTOADAPT on the environment. With lower energy consumption, such pump also has a minimum carbon footprint. With the growing demand for environmental standards, you are guaranteed that your pump will meet the standards for many years to come.

c)Class 1 fire sprinkler/standpipe systems not covered by Clause (b) as well as Class 2 and Class 3 fire sprinkler/standpipe systems shall be protected by a double check valve backflow preventer conforming to CAN/CSA-B64.5.1, “Backflow Preventers, Double Check Valve Type for Fire Systems (DCVAF),” provided that the systems do not use antifreeze or other additives of any kind,

1) In addition to the requirements in Sentence (2), every hot water tank of a storage-type service water heater shall be equipped with a pressure-relief valve

3) Backflow preventers shall be selected and installed in conformance with CAN/CSA-B64.10, “Manual for the Selection and Installation of Backflow Prevention Devices.” (See Appendix A.)

And what does the legislation say about heating pumps? Since 2013, it is only possible to sell circulators in the most energy efficient class A in the European Union. However even within these, there are significant differences in consumption. If you are looking for a pump that will provide you with the ideal heating comfort with minimal possible costs, pick one fitted with AUTOADAPT.

2) Except as permitted in Sentences 7.6.3.4.(2), (4), and (5), the maximum velocity in copper water pipes shall not exceed

2) Every pipe that conveys water from a gravity water tank or from a private water supply system shall be fitted with a shut-off valve at the source of supply.

5) In buildings of residential occupancy that contain more than one dwelling unit, a shut-off valve shall be installed where the water supply enters each dwelling unit, so that, when the water supply to one suite is shut off, the water supply to the remainder of the building is not interrupted. (See Appendix A.)

1) Where a hose bibb is installed outside a building, inside a garage or in an area where there is an identifiable risk of contamination, the potable water system shall be protected against backflow through the hose bibb.

2) Except as provided in Sentences (1) and (3), the hydraulic load of a fixture that is not listed in Table 7.6.3.1. is the number of fixture units listed in Table 7.6.3.2.

3) An atmospheric vacuum breaker shall be installed so that the critical level is at least the distance specified by the manufacturer at which the device will operate safely but not less than 25 mm above

9) A storage-type service water heater that is located in a ceiling or roof space, or over a floor of wood construction, shall be installed within a corrosion-resistant watertight drain pan, as described in Sentence (10).

1) Except as provided in Sentence (2), connections to potable water systems shall be designed and installed so that non-potable water or substances that may render the water non-potable cannot enter the system.

Old three-speed circulator pumps run non-stop. However, the heat requirements in the house vary not only during the year, but also during the day. Three-speed pumps can't respond to these changing requirements and are constantly operating at the same power. It's a similar situation as if your gas boiler was running non-stop and heating your already hot water without its consumption.

2) Backflow caused by back-siphonage or back pressure from fire sprinkler or standpipe systems where water treatment is added shall be prevented by the installation of a reduced pressure principal backflow preventer.

b)so located that the pressure in the tank shall not exceed the pressure at the relief valve by more than 35 kPa under any condition of flow within the distribution system.

1) Except as provided in Sentence (2), every water service pipe shall be sized according to the peak demand flow but shall not be less than 3/4 inch size.

2) Except as required by Sentence (4), potable water system connections to fire sprinkler and standpipe systems shall be protected against backflow caused by back-siphonage or back pressure in conformance with Clauses (a) to (f):

Old three-speed pumps can no longer be sold in the European Union, but their repair is still possible. Although the service of a circulator pump is cheaper, these savings will be lost in the total operational costs in the end. So if your house is still fitted with this outdated type of pump, we recommend replacing it with an electric one even before it actually breaks down. In the case of new buildings, the installation of an electric circulator pump is already a must, and even a necessity stipulated by the valid legislation.