1. The Up-Feed and Gravity Return System

2. The Overhead Feed and Gravity Return system

a System is commonly used in small residential houses and other industrial

installations with the following service features:

1. It provides constant circulation of hot water.

2. Hot water is quickly drawn from the fixtures at any time desired.

3. Provide economical circulating return of unused hot water.

4 Eliminate waste of water

a System is an efficient type of hot water distribution generally used in

building of extreme heights

1. The heating unit and the storage tank are placed below the distribution pipeline.

2. The heating unit should be near and accessible to serve the pipe system conveniently and efficiently.

3. The distribution main pipe is suspended from the ceiling of the basement. It is inclined upward from

the storage unit. The risers are connected to the distribution main.

4. The distribution main pipe is connected to the tapping on top of the storage tank closer to the flow

from the heater.

1. The storage heating unit is placed at the lowest point of the distribution pipe.

2. The overhead feed is connected to a tapping fitting located on top of the storage tank.

3. As much as possible, the riser should be extended direct and free from offsets. No fixture shall be connected directly to the riser.

the large pipe of the installation is installed at the top of the riser, and

the diminishing pipe sizes, passes through the

lower floors.

the larger pipe is installed

at the bottom of the riser and the diminishing sizes

passes through the upper floors of the building.

is a mechanical device used to circulate hot water to the plumbing fixtures.

It is recommended for large building where difficulty of providing natural circulation of hot water is encountered.

the purpose of a _____ is to serve the domestic

hot water system. The tank should be strong enough to

resist the high pressure of boiling water stored in it.

The small hot water tank called_____

The large hot water tank called ______

The ____ Boiler is generally made of copper or

stainless steel sheet. It is built into cylindrical shape with concave ends, welded or riveted to assure strength and durability.

-varies in sizes from 30 to 60 centimeters diameter and a length not more than 180 centimeters long, installed in either vertical or horizontal position.

The ____Tank is made of heavy-duty stainless

steel sheet of diameter varying from 60 to 130 centimeters and not more than 5 meters long. It is installed in either vertical or horizontal position.

the water heater must be of sufficient capacity to replace the discharged water in a reasonable time interval. If a tank installed is designed to serve 50 gallons of water in any , the heater must be able to replace

the_____.

Test results of hot water consumption per person

ranges from _____ per hour. Consumption de-

pends upon the type of building served, and the purpose

for which the water is used.

The working load of hot water supply system in build-

ing is somewhat difficult to estimate, but experienced proved that:

1. For schools, offices or industrial type buildings, the

average rated maximum consumption of hot water

per person is about _____

The working load of hot water supply system in build-

ing is somewhat difficult to estimate, but experienced proved that:

1. For apartments and residences, the average working

load is about ___

The working load of hot water supply system in build-

ing is somewhat difficult to estimate, but experienced proved that:

1. For Hotels, the working load is ____ of the rated

consumption pet person.

Average working load of hot water

-school , office and industrial type

Average working load of hot water

-apartment and residences

Average working load of hot water

-Hotels and restaurant

hot water pipeline should be ____ as possible.

The hot water tank should be ____ .

to where most hot water is needed.

A___ cooper tube if not too long connection, is the most economical size to serve runs for sinks, lavatories, shower bath and other similar

fixtures. Copper tube absorb less heat than steel

pipe, thus, less insulation is required.

pipe carrying domestic hot water, should be insulated to conserve fuel cost, and to assure a correct water temperature at the point of use.

A _____ thick fiberglass was proven efficient insulat-

ing cover.

Hot and cold water line running parallel with each

other should be separated at a minimum distance of

____ to prevent heat interchange.

____ storage tank and heater is preferred

_____ if not controlled may cause

serious damages to the hot water storage unit.

excessive pressure or temperature inside the tank may cause rupture or explosion of the tank. Protect your tank with ______

Install a ______ on the hot water tank, or hot water supply line to protect the system. The _____ must be closer to the tank, provided with a drip pipe from the relief valve extending downward to the basement floor near the floor drain.

The purpose of _____ is to protect the

hot water space heating system,

while the Temperature and Pressure Relief Valve protects the hot water supply

system.

Temperature and Pressure Relief Valve protects the _____

1. The Hot Water Space Heating System

2. The Hot Water Supply System

The _____ where water is confined within a system at low temperature.

The _____ not in a closed system which operate on much higher temperature.