HomeMy WebLinkAbout1970-0672 - Ordinance - 02/23/1970ORDINANCE NO, 672
AN ORDINANCE AMENDING THE PLUMBING CODE, ORDINANCE NO. 511, BY
ADDING CHAPTER 23A, MOBILE HOME PARK PLUMBING AND DRAINAGE SYSTEMS.
BE IT ORDAINED BY THE CITY COUNCIL OF THE CITY OF COLLEGE
STATION, TEXAS:
Ordinance No. 511 is hereby amended by the addition of the following:
CHAPTER 23A
MOBILE HOME PARK PLUMBING AND DRAINAGE SYSTEMS
23. A. 1 GENERAL
23. A. 1.1. Adherence to Code: Mobile park plumbing and sewage systems
shall be designed and installed in accordance with the provisions of this Chapter and the
installation requirements of this code.
23. A. 1.2. Prohibited Piping Installation: No gas piping, non-metallic drainage
or vent piping, sewage disposal system or parts thereof, shall be located in any area
where a mobile home may be parked, or a cabana, or other structure may be built.
23. A. 1.3. Plans and Specifications Required: Before any plumbing or sewage
disposal facilities are installed or altered in any mobile home park, duplicate plans
and specifications shall be filed and proper permits obtained from the City Plumbing
Inspection Department. Plans shall show in detail:
(A) Plot plan of park, property lines, driveways, existing or proposed
buildings and the sizes of Mobile Home lots.
(B) Complete specification and piping layout of proposed plumbing system
or alteration.
23. A. 2. DRAINAGE AND VENT INSTALLATION
23. A. 2.1. Drainage Installation: Each Mobile Home lot shall be provided with
a 3-inch I. P. S. male or female threaded connection extending above the surrounding
grade from a 3-inch, minimum size, vented "P" trap. Traps shall be located with
reference to the immediate boundary lines of the designated space or area within
each trailer site that will actually be occupied by the trailer. Each such trap shall
be located in the rear third quarter section along the left boundary line of the trailer
parking area. Each trap inlet connection shall be protected at grade by a concrete
pad not less than 8 inches thick and 18 inches square, and with the top rounded up
to the level of the inlet. No trap shall be more than 24 inches below grade. Each
trap inlet connection shall be effectively capped with a screw type cap or plug when
not in use.
VA� 458
Ordinance No. 672 Page 2
23. A. 2. 2. Mobile Home Drainage Connectors: Connectors from Mobile Home
drain to trap inlet shall be of sanitary semi -rigid pipe installed so that there is no trap
in the connector.
23. A. 2.3. Materials: All traps, risers from traps, horizontal vents and the
first five (5) feet from the trap on each trap branch shall be of materials approved for
underground use within a building; provided, however, that an approved type non-metallic
pipe with Elastomeric Compression type joints may be used for the balance of the system
when not under any Mobile Home or any possible future building site.
23. A. 2.4. Wet Vents: Drainage systems may be wet vented as set forth in this
section of the code.
23. A. 2. 5. Location and Size of Vents: Each wet vented drainage system shall
be provided with a vent not more than 15 feet downstream from its upper trap, and long
mains shall be provided with additional relief vents at intervals of not more than 100 feet
thereafter; the minimum size of any vent serving a wet vented system shall be not less
than 3 inches in diameter and it need not be larger than 4 inches in diameter. See
Figure C .
23. A. 2. 6. Prohibited Wet Vents: The drainage system of any building shall
not discharge into a wet vented line. No building or house sewer shall serve as a wet
vent.
23. A. 2. 7. Vent Supports and Protection: Vents shall be securely fastened to
4 X 4 redwood post or have equivalent support. Galvanized iron or galvanized steel vents
may be anchored in a substantial concrete base extending not less than 12 inches above the
junction with the cast iron pipe or fitting. Galvanized vent pipe, steel or iron, may extend
below ground vertically and may directly intersect a drainage line, providing the entire
section around the vent pipe and drainage line is encased in concrete, shall first be coated
with bituminous paint or equivalent protective material.
23. A. 2. 8. Size and Location of Clean Outs: Cleanouts shall be provided at
the upper end of each horizontal drainage line and at intervals of not more than 50 feet
thereafter. Each cleanout shall be brought up to grade and made readily accessible.
Cleanout fittings shall not be less than the size of the pipe except that none need be
larger than 4 inches.
23.A.2. 9. Pipe Sizes: For the purpose of determining pipe sizes, each Mobile
Horne connection shall be assigned a waste loading value of 6 fixture units and each Mobile
Home Park drainage system shall be sized as provided in Paragraph 23.2.10.
3 r 3
Ordinance No. 672 Page 3
23. A. 2.10. Pipe Size for Mobile Home Park Drainage System:
Max. No. Mobile Home Maximum No. Mobile Home
Individually Vented Wet Vented Size of
System System Drain
2
1
*3It
30
10
4"
100
50
6"
400
4*
8„
*The maximum length of any 3-inch trap branch is 6 feet from its vent.
** Will require special design. Consult Plumbing Inspector.
23.A.3. WATER DISTRIBUTING SYSTEM:
23.A.3.1. General Requirements & Materials: Each Mobile Home Park water
distributing system shall conform to the requirements of Chapter 19 and shall be so
designed and maintained as to provide a residual pressure of 20 P. S.1. at each mobile
home lot under normal operating conditions.
(a) Except pipe used for water main or water service line may be Class 200
P. V . C . (SDR -21-) Solvent Weld or Bell type joints with rubber rings.
(b) Approved for Potable Water: All pipe and fitting shall meet the specifications
for potable water of the National Sanitation Foundation Testing Laboratory, Inc. ,
and conform with the applicable ASA, ASTM, or commercial standard as developed.
(c) Solvent weld joints may be used on the smaller size of Pipe - 3/4" - 1 1/4"
Bell type joint with rubber rings shall be used on all pipe over 1 1/4" with the
rubber ring conforming to ASTM D 1869-63T specifications.
(d) The bell shall be an integral and homogeneous part of the pipe and shall be
a maximum ratio of O. D. to wall thickness of 21:1 in the bell and ring groove
as well as the barrel of the pipe to provide a minimum pressure rating of 200
P. S. I. throughout; the pipe and joint.
The minimum wall thickness at the bell joint shall be:
1 1/2" 2" 2 1/2" 311 411 6"
.129" .156" .184" .219" .277" .395"
Ordinance No. 672
Page 4
(e) Pipe and fittings shall be made from clean, virgin, NSF approved, Type I,
Grade 1 ( PVC 1120) PVC, conforming to ASTM resin specification D 1784-65T.
Pipe shall be pressure rated at hydrostatic working pressures of 200 P. S. I. at
73.40 F, and shall meet requirements as set forth in Commercial Standard CS
256-63 with standard dimension Ratio SDR 21.
(f ) In addition to the above requirements, pipe must conform to the following
tests, conducted at 73.40 F:
Quick Burst Test: In accordance with ASTM 1599-62T, a sample shall withstand
without failure a pressure of 640 psi (8, 000 hopp tensile stress ) applied in 60 to
90 seconds.
Sustained Pressure Test: A sample shall withstand without failure for 1, 000
hours a pressure of 400 psi (5, 000 hoop tensile stress) in accordance with
ASTM 1598-63T.
Acetone Immersion Test: After two hours immersion in a sealed container of
anhydrous (99. 5% pure) acetone, a 1" long sample shall show no visible spalling
or cracking. (Swelling or softening is not a failure). In accordance with
ASTM 2152-63T.
Vise Flattening Test: Place between two flat parallel plates a 2" long ring, and
compress in less than one minute to 100% flattening. There shall be no evidence
of splitting or shattering.
Drop Impact Test: A single impact load from a freely falling missile having a
1/2" diameter rounded 1" long nose shall be impacted on a 6" long horizontally
placed specimen sample. No shattering or splitting ( denting is not a failure)
shall be evident when the following energy is imposed:
Nom. Size 1 1/2" 2" 2 1/2" 3" 4" 6"
Foot/Lbs. 24 34 43 57 86 180+
(g) The pipe shall be homogeneous throughout and free from cracks, holes,
foreign inclusions or other defects. The pipe shall be as uniform as commercially
practical in color.
(h) The pipe shall be shipped with one coupling factory applied on the small pipe.
Pipe shall have a ring painted around the uncoupled end in such a manner as to
allow field checking of setting depth of pipe in the socket. This requirement is
made to assist construction superintendents and inspectors in visual inspection
of pipe installation. If belled -end pipe is specified, the same ring shall be
painted around the male end of the pipe.
Ordinance No. 672
Page 5
(i) Pipe must be delivered to job site by means which will adequately support
it, and not subject it to undue stresses. In particular, the load shall be so
supported that the bottom rows of pipe are not damaged by crushing. Pipe
shall be unloaded carefully and strung or stored as close to the final point
of placement as is practical.
(j) The workmanship, pipe dimensions and tolerances, outside diameters,
wall thickness, eccentricity, sustained pressures, burst pressures,
flattening, extrusion quality, marking and all other requirements of Commercial
Standards CS 256 shall be conformed with in all respects.
(k) The PVC pipe and fitting shall bear the National Sanitation Foundation
(nSf) seal of approval.
(1) PVC Fittings:
General: Fittings shall be of the same material as the pipe, and in
no case shall have thinner walls than that of the pipe furnished.
Preference will be given to the use of extruded fittings. Where
molded fittings must be used, they shall be equal to those produced
by the Sloane Manufacturing Company.
The dry fit of fittings and coupling sockets must be snug. If the fit
is such that it is loose, the pipe and/or fittings should be rejected
as faulty because of improper size. Building up the joint to overcome
a loose fit with multiple layers of filler solvent will not be permitted.
PVC Couplings: The 3/4" PVC coupling may be of the molded type.
The 1" through 1 1/4" must be of the extruded type, designed to be
interference fit for at least one-half of the socket depth. They shall
have a beveled entrance to prevent the wiping off of the solvents
on male end while being installed. The following will be considered
the minimum socket depth for PVC couplings:
SIZE SOCKET
3/4"
1.000
1 "
1.600
1 1/4"
1.600
The wall thickness of the PVC couplings shall be equal to SDR 17 pipe
or shall be 0.10 of an inch thick, whichever is greater.
Ordinance No. 672
Page 6
Elbows: Preferably these fittings shall be long radius bends with
minimum walls equal to that of the pipe joining or shall be 0.10 of an
inch thick, whichever is greater. Tapered welding sockets shall be
equal to those required for couplings. Standard elbows as manufactured
by Sloane Manufacturing Company shall be acceptable.
Mechanical Joint Adapters: It is contemplated that valves 2" and larger
may be specified mechanical joint. AWWA, IBBM, DD, NES, and in such
event PVC Mechanical Joint Adapters, shall be furnished. They are to be
made up of Schedule 80 PVC at least 12 inches long. One end shall be
built up to an O. D. equal to that required by the mechanical joint fitting.
Service Tees: Smaller than 2" service tees shall be a molded type fitting
equal to Sloane Manufacturing Company. The 2" service tees and larger
shall be tapped couplings. These couplings shall be similar to the line
couplings with equal socket depth, and in addition, shall be made with
regular pipe section welded in the middle for a stop and extra strength.
The area around the tapped outlet shall be reinforced with a weld -on
saddle, if necessary. The construction of the coupling shall be
adequate for securing the corporation stop without the possibility of
splitting or cracking around the tapped hole. Depth of threads shall not
be less than 5/8".
Male Adapters: They shall be of the heavy-duty type, be made of
extruded Schedule 80 pipe and have socket depths equal to the coupling.
All threads shall be iron pipe size and be sized for a tight fit. Extra
heavy duty adapters shall be used wherever possible.
Tees: They shall be a molded fitting such as made by Sloane Manufacturing
Company. It is recommended that a deep socket adapter be installed in
each outlet by the pipe manufacturer or by the contractor at least 24 hours
before field installation. The deep socket adapter shall have a socket
depth equal to the coupling. It is required that deep socket adapters be
used whenever there is a possibility of a beam stress which may weaken
welded joint.
Deep Socket Adapters: A deep socket adapter is a PVC fitting which is
IPS O. D. by PVC deep socket. The socket and wall must be equal to the
coupling requirements. Installation should be made by the pipe manu-
facturer or the contractor at least 24 hours before field installation. It
is used to convert standard shallow sockets to a deep socket.
(m) PVC Welding Solvents: All PVC welding solvents shall conform to ASTM
D-2564-66T specifications and be approved by National Sanitation Foundation
for potable water usage.
The PVC welding solvent shall be compounded to conform with the socket fit and
the weather conditions at the time of installation and be such as to assure a weld of
maximum strength. 01.763
Ordinance No. 672
(n) PVC Pipe Laying:
Page 7
General: Only competent men at laying plastic pipe shall be employed
on this phase of the work, and complete suitable equipment necessary
for the execution of same is required. Any incompetency observed by
the Plumbing Inspector must be removed at his request.
The pipe, fittings, and valves shall be placed in the trench with care.
Under no circumstances shall pipe or other materials be dropped or
dumped into the trench. The pipe shall not be dragged in a manner
which would cause scratching of the pipe surface. An excessive amount
of scratching on the surface of the pipe will be considered cause for
rej ection.
The pipe shall be snaked into the trench, either employing the natural
snaking tendency or'.the pipe shall be laid from one side to the other
on alternate lengths.
Pipe Cleaning During Laying Operations: All joints and the male end
of the pipe shall be free of foreign matter. At the termination of pipe
laying, the open end of the pipeline shall be closed off by a suitable
cover until laying operations are resumed.
Inspection of Materials During Construction: Any materials not meeting
the specifications, or obviously faulty material, shall be rejected by
the Plumbing Inspector and removed from the job site by the Plumbing
Contractor. At the option of the Plumbing Inspector, joints may be cut
from the pipeline for inspection. No more than two joints of each pipe
size laid shall be cut out in any one day for inspection unless a joint
examined proves unsatisfactory to the engineer. In case of an unsatis-
factory joint, joints shall be cut out of the line and examined until two
consecutive joints examined prove satisfactory.
Solvent Welded .joints: All dirt, dust and moisture shall be removed
from the surfaces to be welded. Solvents are to be applied with a non -
synthetic bristle brush of proper width. Solvent and/or filler solvent
shall be applied in a method recommended by the pipe manufacturer or
approved by the engineer.
Solvent weld joints shall be given at least 15 minutes set-up curing
time before moving or handling. No pipe or fittings shall be joined
when the temperature is below 25 degrees or above 90 degrees F unless
the method is specifically approved by the Plumbing Inspector.
Ordinance No. 672
Page 8
PVC Thread Sealant: This material shall be Liquid O-Ring or approved
equal.
Breaks in Pipe or Joints: Shall be repaired to the satisfaction of the
Plumbing Inspector and at the expense of the Plumbing Contractor.
Cutting Pipe: All cutting of the pipe shall be done in a neat working like
manner and without damage to existing or new lines. A fine tooth saw,
tubing cutter or similar tool may be used to cut the pipe. Cut must be
square and ragged edges removed with a cutting tool and/or file.
Trench Width and Cover: The trench width shall be a minimum of three
times the nominal diameter of the pipe. All pipe shall be laid with a
protective cover.
Bed and Cover: Each section of pipe in the trench shall rest upon the
pipe bed for the full length of its barrel. The bottom of the trench shall
be free from rocks, clods, or other sharp -edged objects. The subgrade
upon which the pipe is placed shall consist of material suitable for
supporting the pipe without excessive settlement or stress development.
If the pipe is to be laid in a trench having a rock bottom, three inches
of sand or other suitable bed material shall be prepared before the pipe
is lowered into the trench.
Backfilling shall be carefully placed to avoid dropping rocks or large
clods on the pipe. All backfill within six inches of the pipe shall contain
no stones larger than one inch.
Service lines and laterals must be assembled so that no strain is placed
on the pipe during or after backfill operations. After laying of the pipe
is completed, it shall be center loaded with backfill to prevent arching
and whipping under pressure. Center loading should be done carefully so
that joints will be completely exposed for examination during testing,
unless conditions warrant complete backfill before testing.
(o) Hydrostatic Tests: All tests and testing equipment shall be provided by the
Plumbing Contractor at no cost to the owner. Prior to performance of the test,
all air shall be expelled from the pipeline to the satisfaction of the Plumbing
Inspector. This may be accomplished by means of air relief valves, blowoff
valves, hydrants, or other means. If required, taps shall be made at high
points. Such taps shall be plugged after testing is completed.
Ordinance No. 672
Page 9
After the pipe has been laid and center loaded, or backfilled, if conditions
warrant complete backfilling, a test pressure of not more than 30% above
systems anticipated working pressure may be applied. After the specified
pressure has been reached, the pump shall be stopped and all exposed pipe,
fittings, valves, hydrants, joints, and appurtenances examined for leaks.
Any visible leaks shall be repaired. The installation will be considered
acceptable when the specified test pressure has been maintained without
loss for a period of not less than two hours or until the Plumbing Inspector
has inspected and approved the test section, whichever is longer.
(p) Removal of Air: In the event air is admitted to the pipeline after
being expelled for the hydrostatic tests, such air shall be removed prior
to completion of the system and acceptance by the owner. The air may
be removed by the methods described herein. In no case, shall the
system be placed in operation prior to the removal of the air.
(q) Service Connections: All service connections shall be made by
means of tees, tapped couplings and other approved fittings. The use of
plastic saddles will not be permitted. Wherever possible, corporation
stops shall be placed in plastic lines before conducting hydrostatic tests.
23. A. 3.2. Size of Supply Connection: Each Mobile Home lot branch water supply
connection shall be not less than 3/4 diameter. A matching cap or plug shall be provided
to seal the water inlet when not in use, and shall be attached with a substantial chain.
23. A. 3.3. Protection from Cross Connections: An approved pressure type
vacuum breaker and spring loaded check valve shall be installed on the water supply
branch at, or near, the Mobile Home connection. See Figure A.
23.A.3.4. Relief Valves: An approved pressure relief valve shall be installed
immediately on the discharge side of each vacuum breaker and check valve. See Figure
A. Each pressure relief valve shall be equipped with a full size drain with the end of
the pipe not more than 2 feet nor less than 6 inches above ground and pointing downward.
Such drain may terminate at other approved locations. No part of such drain may be
trapped. No shut-off valve shall be installed between a relief valve and the Mobile Home
it serves.
23. A. 3. 5. Shut Off Valve: A gate valve shall be installed immediately upstream
from the combination vacuum breaker and relief valve. See Figure A.
23. A. 3. 6. Ditch: Water pipe shall be installed in a separate ditch.
23. A. 4. INSPECTION:
23. A. 4.1. Testin : Installations shall be tested and inspected as required by
the installation requirements of this code.
Ordinance No. 672
23.A.5. RESPONSIBILITY:
Page 10
23. A. 5.1. Code Violations: When it is evident that there exists, or may exist,
a violation of any pertinent regulation, the owner, lessee, operator, person in charge
of the park, or any person in causing a violation, shall immediately disconnect the Mobile
Home water supply and sewer connection from the respective park systems and shall
employ such other corrective measures as may be ordered by the City Plumbing
Inspector.
23. A. 5.2. Maintenance: All required devices or safe guards shall be maintained
in good working order. The owner, operator, lessee, or his designated agent shall be
responsible for their maintenance.
PASSED AND APPROVED this 23rd day of February, 1970.
PR
` Wr
Mayor
ATTEST:
City Secretary
las 01767
Attachment to Ordinance No. 672
TRAILER PARK i'L UMBI NG I) :TA L I,S
Spring Loaded i
Gate heck Valve
Valy® Relief velum ► �4�
t q4'.01080 Connection•
Relief Drain
Concrete
Pad
/✓�/� �t.w. Protect Pipe w
;el M JN thru Concrete
Figure B
i�-A
Trailer Coac Sewer Connection
Vent 10 ft.High. 10 it. Flexible Sanitary Trailer '
460x 4~Poet from Property Line Connection to Permit Sway of
Trailer Without Damage to
Plumbing
• •o p, ; a'e P t : ` Metal Cover
Trailer Park
„d..rStrap Connection Concrete Cap When Not in
Use
C.O. to Grade
Figure D
Allow 6 fixture units
for each Trailer Trap
No Clay Pipe Within 1 ft. Durham Elbow --
of Surface"
Pad •+ v �.e• :�r.
igure .0 ,
Riser 24"`
i
First S it cast iron pipe
Max. 'trap Arm 31! 6 ft.
Max. Trap Arm 4" » 15 ft.
Fu r r
•;'Y
Ordinance No. 672 attachment
TYPICAL WET d V VI LY ,A INSTALLATION
Convantional oyatem
(Size according to
u on
Xcap Vonts Not Lose
tIvan 10' from property
l inet
C.O.
Relief vent
rrunk Lima
" Grades M
C.O.
Cleanout
pwc r 50'
Wet Vented Branch
Ekallre
' y
4" - Maxii-num Trap Arm 151
3" - Maximum Trap Arm 61
Maximum. No. of Traps on' any single Branch of 'UfJ'et- Vented System:
3Y0 - Pipe 1 Trap
411a Pipe 10 Traps
611 _]Pipe 50 Traps
Main vent for 3" Branch 3°°'.,'w Pipe (Relief 310)
Main vent for 41° Branch 3" - Pipe (Relief 3,)
Main vent for 6" Branch 4" w Pipe (Relief 311)
Attachment to Ordinance No. 672
TRAILER COURT' DETAILS
w . i Trailer Spaee.,Muat be Shown and Boundary Linea Approved Before Locating
Plumbing