Master Plumber Review Email Add: cgdreview.cebu@gmail.

com
MODULE 2: PLUMBING CODE & SANITARY DESIGN Contact number: 0945-280-7131

Chapter 3: General Regulations Summary: Except that: double hub sanitary tapped tee ➢ HORIZONTAL PIPING: • Use strap iron or special pipe hangers for this
1. GRADE OF HORIZONTAL PIPING may be used on vertical lines as a fixture ▪ Cast Iron Soil Pipe purpose
➢ Drainage pipes shall be run in practical connection. (approved stainless steel bands ✓ Suspended cast iron soil pipe shall
alignments & at a uniform slope between with neoprene gaskets for jointing hubless be supported at not more than
manholes of not less than 20mm/m or 2% cast iron soil pipes are acceptable for use) 1.5m intervals, except that pipe
toward the point of disposal. ➢ No Drainage or Vent piping shall be drilled exceeding 1.5m length may be
If it is impracticable to obtain such slope due & tapped for making connections thereto, supported at not more than 3m
to the following conditions: and no cast iron soil pipe shall be threaded. intervals. Supports shall be
▪ Excessive depth of the proposed ➢ No Waste Connection shall be made to a adequate to maintain alignment &
drainage line closet bend or stub of a water closet or to prevent sagging & shall be
▪ Structural and/or geological features of similar fixtures. placed within 0.45m of the hub
the terrain ➢ No Vent pipe shall be used as a soil or or joint.
▪ Existing adverse in arrangements of waste pipe & vice versa ✓ Hubless or compression gasket
building structure 4. PROTECTION OF PIPING, MATERIALS & joints must be supported at least
Any such pipe or piping 102mm or larger in STRUCTURES every other joint except that when
diameter may have a slope of 10mm/m or ➢ All pipings passing under or through walls the developed length between
1% provided it is approved by shall be protected from breakage with supports exceeds 1.2m, they shall
Administrative Authority embedded metal pipe sleeves. be provided at each joint.
2. CHANGES IN DIRECTION OF DRAINAGE FLOW ➢ All pipes passing through or under cinders or ▪ Screwed Pipe - IPS shall be
➢ Changes in direction of piping shall be made other corrosive materials shall be protected supported at approximately 3.0m
by the use of approved pipe fittings & shall be from external corrosion by encasing same intervals for piping 19mm diameter &
the angles presented by: with polyethylene sheath or in any other smaller & 3.6m intervals for piping
▪ 22 ½ degrees bend approved manner. 25mm & larger in diameter.
▪ 45 degrees bend ➢ Void between pipes & sleeves through ▪ Copper Tubing - shall be
▪ 60 degrees bend or other approved concrete floors in the ground shall be supported at approximately 1.8m
fittings of longer sweeps. appropriately sealed with bitumen. intervals for piping 38mm diameter &
➢ Horizontal drainage lines connecting to a ➢ The bottom of all pipe trenches deeper than smaller & 3.0m intervals for piping
vertical stack shall enter through: the footing of any adjacent building or 51mm & larger in dia.
▪ 45 wye branches structure & parallel to it must be at least ▪ Lead Pipe - shall be supported at by
▪ combination wye & 1/8 bend branches 45degrees therefrom, unless permission is stiff metal or wooden backing for
▪ or other approved fittings of longer granted by Administrative Authority. entire length with hangers properly
sweeps. ➢ No building sewer or other drainage pipings spaced.
➢ Horizontal drainage lines connecting to other or part thereof, constructed of materials ▪ In Ground - piping buried on the ground
horizontal drainage lines shall enter through: other than that approved for use under or shall be laid on the firm bed for its
▪ 45 wye branches within the building, shall be installed under entire length, except where concrete
• Vertical runs of cast-iron pipe can be attached to
▪ combination wye & 1/8 bend branches or within 0.6m of any building or cradle support is provided which is
▪ or other approved fittings of longer structure, nor less than 0.3m below the adequate & approved by the the building structure with wire staples, vertical
sweeps. finish ground surface. Administrative Authority. pipe brackets or pie straps
➢ Vertical drainage lines connecting to other 5. HANGERS & SUPPORTS ▪ Plastic Tube - shall be
horizontal drainage line shall enter through: ➢ VERTICAL PIPING: supported by stiff metal or wood
▪ 45 wye branches ▪ Cast Iron Soil Pipe - Bell & Spigot & backing with hangers in its entire
▪ or other approved fittings of longer Hubless pipe shall be supported at length for small-size tubings up to
sweeps. every storey or closer. 38mm diameter & without backings
▪ 60 degree branches or offsets (only for ▪ Screwed Pipe - Iron Pipe Size but with spaced metal hangers at
pipes installed in true vertical position) (IPS) shall be supported at not less approved spacing for larger-size
3. PROHIBITED FITTINGS & PRACTICES than every other storey height. tubings.
➢ No Drainage Fitting shall use: ▪ Copper Tubing - shall be
▪ Double hub fitting for leak-caulked joint supported at each storey or at a Practical Problems & Experience (connection)
in vertical position maximum intervals of 3m o.c. Supporting Cast-iron Pipe:
▪ Single or double tee branch ▪ Lead Pipe - shall be supported at • Supports shall be placed at every joint on
▪ Single or double tapped tee branch intervals not exceeding 1.20m at horizontal runs unless distance between joints is
▪ Side inlet quarter bend centers with a rigid vertical back-up less than 4 ft.
▪ Running thread, band or saddle ▪ Plastic Pipe - shall be
supported at every 1m interval.
 Master Plumber Review Email Add: cgdreview.cebu@gmail.com
MODULE 2: PLUMBING CODE & SANITARY DESIGN Contact number: 0945-280-7131

Masonry Anchors/Fasteners:
• Lag shields (made from lead) are commonly used ➢ Trenches shall be back-filled in thin layers of
to attach pipe hangers or fixtures to concrete or 0.3m above the top of the pipe with clean
masonry. earth which shall not contain stones,
boulders, cinders or other materials which
can damage or break the pipes or cause
corrosive action.

Chapter 4: Plumbing Fixtures Summary:

Plumbing Fixtures
Receptacles which are used to provide, receive and discharge
water, liquid and water-carried wastes into a drainage
system with which they are connected to

Classifications:
Soil
• Soil
• Urinals
• Slop Sinks

• Caulking anchors provide a fastener which is Scullery

permanently attached to the concrete or masonry; • Kitchen Sinks
it is internally threaded to accept machine screws • Laundry Tubs
and bolts • Bar Sinks

Bathing
• Lavatories
• Bathtubs
• Shower Baths
• Plastic Anchors can be installed in smaller holes
• Bidets
• Foot/Sitz Tub
• Shower Receptors
• Shower Compartments

Soil Fixtures
A. WATER CLOSETS
• Friction clamps should support the weight of cast- Setting:
iron pipe at each floor level o Water closet center to side wall:
minimum of 0.375 m
• Toggle Bolts are used when attaching pipes to o Water closet center to WC center:
hollow masonry units; with spring-operated wings minimum of 0.75 m

Types:
o According to Type of Flushing
6. TRENCHING, EXCAVATION & BACKFILL - Flush Tank water closets
➢ Tunnels shall have:
- Direct Flush Valve (DFV
▪ a clear height of 0.6m above the pipe
water closets) - Flushing
& shall be limited in length to 1/2 the
depth of the trench. action can be obtained
▪ 2.4m max. length & shall be limited in directly from a flush valve
length to 1/2 the depth of the trench. connected into the bowl
▪ driven pipes shall have at least one
pipe size larger than the pipe to be laid
Master Plumber Review Email Add: cgdreview.cebu@gmail.com
MODULE 2: PLUMBING CODE & SANITARY DESIGN Contact number: 0945-280-7131

c. Flushes through a flush valve connected

simple wash down into the bowl
action o Other types of water closets
d. Flushes through a - Squat type
simple wash down
action
e. Flushes through a
simple wash down
action
- Reverse Trap
o According to Mounting
o According to Flush Tank Types - Floor Mounted
- Integral Flush Tank
- Washout

a. Flushes through a
siphon action created in
the trapway.
- Siphon Jet

- Close Coupled Flush Tank

- Wall Hung

a. Has a larger trapway

making it less likely to
clog
b. Quieter flushing action
c. Retains a large amount
of standing water
- Siphon Vortex
- Low Flush Tank

o According to Flushing Action

- Wash Down

a. Less noisy and very

efficient
- High Flush Tank b. Flushing action is
started by a whirlpool
motion followed by a
a. Flushes through a complete flush down
simple wash down - Direct Flush Valve
action a. flushing action is
b. Flushes through a obtained directly from a
simple wash down
action
 Master Plumber Review Email Add: cgdreview.cebu@gmail.com
MODULE 2: PLUMBING CODE & SANITARY DESIGN Contact number: 0945-280-7131

Minimum Requirements for Urinals

Dormitories 1 per 10 males
1 per 8 females OCCUPANCY WC NO. OF USERS
1 per additional 25 males, 20
females Schools: 1 per 75 males
Elementary 1 per 35 males
Secondary

Industrial 1 per 1 - 10 persons

2 for 11 - 25 persons
3 for 26 - 50 persons
Office or 1 per 1-100 males
4 for 51 - 75 persons
Public 2 per 101-200 males
5 for 76 - 100 persons - Formed Steel Coated with Porcelain Enamel
Building 3 per 201-400 males
1 per additional 30 persons in
4 per 401-600 males
excess of 100
1 For each additional 300
males

B. URINALS Assembly 1 per 1-100 males

Types: Places 2 per 101-200 males
o Wall Hung (Theaters and 3 per 201-400 males
Minimum Requirements for Water Closets o Pedestal auditoriums)- 4 per 401-600 males
o Through for public use) 1 For each additional 500 - Single, Double or Triple Well, Shallow and
OCCUPANCY WC NO. OF USERS
o Stall males Deep well, etc.
Dwelling or 1 family
Apartment Setting:
o Urinal center to side wall: minimum of
0.30 m
Elementary 1 for 1-20 persons o Urinal center to urinal center: minimum Dormitories 1 Per 25 males
Schools 2 For 21-50 persons of 0.60 m 1 per 50 males in excess of 150
1 per additional 50 persons
Flushing:
o Flushing urinals shall be done through
automatic flushing tanks. (NPC 408.1) Industrial and 0 0
o Flushometer valves shall be self-closing Commercial
type discharging a predetermined
Assembly 1 per 1-100 males quantity of water. No manually
Places 2 per 101-200 males Scullery Fixtures
controlled flushometer valve shall be A. KITCHEN SINKS
(Theaters 3 per 201-400 males used to flush group urinals. (NPC 408.2)
and 3 per 1-50 females Materials:
Auditoriums- 4 per 51-100 females - Stainless Steel
for public 8 per 101-200 females
use) 1 per additional 500 males over
400
2 per additional 300 females over
400

- Cast Iron Enamel

B. LAUNDRY TUBS
 Master Plumber Review Email Add: cgdreview.cebu@gmail.com
MODULE 2: PLUMBING CODE & SANITARY DESIGN Contact number: 0945-280-7131

Materials: o Pullman or Counter • Sometimes referred to as female urinals 1. MATERIALS – GENERAL REQUIREMENTS
o Cement or Cement with Tiles ➢ All porcelain enamel surfaces on plumbing
o Porcelain D. FLOOR DRAINS fixtures shall be acid resistant
o With approved-type hinged strainer ➢ Water closet bowls for public use shall be
plate having the sum of the areas of the elongated bowl types equipped with
open-front seats.
small holes of the waterway equal to the
2. MATERIALS – ALTERNATIVES
cross-sectional area of the tailpiece
➢ Restaurant kitchen & other special-use sink
o Provided with integrally cast water stop may be made of approved-type bonderized
o Wall Hung outside flange around the body at mid & galvanized sheet steel not less than
depth and with an inside caulk outlet to Ga.16 U.S. B&S or 1.6mm thk.
provide a watertight joint in the floor 3. STAINERS & CONNECTIONS
➢ Strainers serving shower drains shall have
a waterway equivalent area of the “tailpiece”
– meaning, the sum of all the areas of the
perforation of the strainer is equivalent to the
outlet area.
➢ Fixtures having concealed slip joint
connections shall be provided with an access
panel or utility at least 0.3m in its least
o Trough dimension for inspection & repair.
- Where janitors clean & leave ➢ Continuous waste fixture tailpiece
their mops connections were exposed or accessible may
be of seamless drawn brass not less than Ga.
C. BAR SINKS
20 B&S or 0.8mm thk.
E. SHOWER RECEPTORS ➢ Continuous waste or waste & overflow shall
o Receptor floor shall drain not less than not be less than:
2% or more than 4% slope. ▪ 38mm outside dia. (O.D.) for:
o Thresholds shall accommodate a ✓ sinks, dishwashers, laundry tubs,
minimum 559 mm wide door. bathtubs, & similar fixtures
o For wheelchair use, dam or curb may be ✓ urinals (brass & copper-not
allowed!)
B. BATHTUBS eliminated.
▪ 32mm outside dia. (O.D.) for:
o WHIRLPOOL BATHS ✓ lavatories, drinking fountains &
- with removable panel of F. SHOWER BATHS/COMPARTMENTS similar small fixtures
Bathing Fixtures sufficient dimension to o Metal enclosure containing shower 4. SPECIAL FIXTURES & SPECIALTIES
A. LAVATORIES access pump head, valves and faucets ➢ Wastewater drain for “Sacrarium” cupsink
Types: - circulation pump shall be o Shall have a minimum interior area of at church altar & baptisteries font outlet shall
o Pedestal located above the crown weir 0.6 sqm and shall be capable of discharge direct to the ground & not
of the trap encompassing a 762 mm diameter connected to any sanitary or drainage
- pump and circulation piping circle. system.
shall be self-draining o This area shall be maintained from a 5. INSTALLATION
point above the shower drain to a height ➢ No water closet or bidet shall be set closer
o JACUZZIS
of 1.78 m with no protrusions other than 0.375m from its center to any side of
- Brand Name of luxury type
than the fixture valve, shower head and the wall or obstruction or closer than 0.75m
bathtubs center to center to any similar fixture.
safety grab rails.
➢ No urinal shall be set closer than 0.6m
C. BIDETS o Drains for gang shower rooms shall be
center to center.
Setting: spaced not more than 4.9 m apart. 6. SHOWER STALLS
o Bidet center to side wall: minimum of ➢ Each shower receptor shall be a n approved
0.375 m type and be constructed to have a finished
o Bidet center to side wall: minimum of dam, curb, or threshold which is at least
0.375 m 25.4mm lower than the outside floor.
• Used for cleaning private parts
 Master Plumber Review Email Add: cgdreview.cebu@gmail.com
MODULE 2: PLUMBING CODE & SANITARY DESIGN Contact number: 0945-280-7131

➢ In no case shall any dam or threshold be less ➢ 1 laundry tray per 50 persons
than 51mm or more than 228mm in depth ➢ 1 slop sink per 100 persons
when measured from the top of the dam or ➢ 1 water closet & 1 urinal per 30 workmen (for
threshold of the drain. temporary workingmen facilities)
➢ The finished floor of the receptor shall slope ➢ 1 drinking fountain per occupied floor in
uniformly from sides towards the drain not schools, theaters, auditoriums, dormitories
less than 2% or 20mm/m or more than offices or public building
4% or 40mm/m. ➢ total no. of water closets required for females
➢ 559mm min. width of threshold. shall be at least equal for the total no. of
➢ 1.2m min. distance between the door or water closets & urinals required for males.
entry to the drain. ❖ For assembly areas (theaters, auditoriums, dormitories,
➢ 0.6m2 min. finished interior area of shower offices, of public buildings) used by more than 6
stalls (any shape) & shall be capable of persons:
encompassing a 762mm dia. circle. 1 drinking fountain for the first 75 persons & additional of 1
➢ The minimum area & dimensions shall be drinking fountain for the next 150 persons.
maintained from a point above the shower
drain outlet to a height of 1.78m with no
protrusions other than the fixture valve or
valves, shower head & safety grab bars or
rails.
➢ When shower receptors are built above
ground the sub-floor & rough side of walls to
a height of no less than 76mm above the
top of the finished dam or threshold.
➢ No metallic shower sub-pans or linings may
be built-up on jobsite of not less than (3)
three layers of standard grade 6.8kg
asphalt-impregnated roofing felt. All folds,
laps & reinforcing webbing shall extend to at
least 101mm in all directions producing a
tensile strength of not less than 0.9kg/mm
in either directions.
➢ For public showers: drains in gutters shall not
be spaced more than 4.9m apart.
➢ 48.880C max. temperature of hot water in
showers & shall have:
▪ individual shower control valves of the
pressure balance or the thermostatic
mixing valve type for individual water
heaters
▪ master thermostatic mixing valve type
in lieu of individually controlled
pressure balance or the for multiple
gang showers
7. MINIMUM RATIO of PLUMBING FACILITIES
➢ 1 laundry tray & 1 automatic washer
standpipe per 1 dwelling unit
➢ 2 laundry trays & 2 automatic washer
standpipes per 10 apartments
➢ 1 kitchen sink per 1 dwelling unit or
1apartment
➢ 1 lavatory per 5 persons (where there is
exposure to skin contamination with
poisonous, infectious, or irritating materials)