150 StandardTee Pipe outlet

Pre cast ConcreteAccess Cover

225 Brick Wall

1:2:4 Conc.

B r c No 8 or Equivalent

150 StandardTee Pipe inlet

B r c No 8 or Equivalent

1:2:4 ConcreteBase Slab

Grease Seat

1:2:4 ConcreteBenching

1:3 CementMortar 12mm Thick

50mm Pre cast Cover

Grease Seat

10mm M S BarsBent to Shape

25 Cover

Concrete Footing

150mmØ pipe outlet

Open Joint Block WallHoney Combed

Packed With BrickBats Concrete Pieces

or 150 Rubble

50 Pre cast Concrete Access Cover

ConcreteFooting 1:2:5

Invert or Soak awayNot to be Concrete

Open Jointed CementBlock Wall

Honey Combed

Block Wall Rendered1:5 Cement Mortar on

Inside

2 No12mm Ø Bar@ 75 ctrs.

225x150 R.CBeam 225 x 150mm

AREAS

floor

ceilinginternalwall

MATERIAL SPECIFICATIONSbenchingconcrete

foundation concreteto septic tank

hardcore filling

450

3000

soil and vent pipe

above roof levelballoon cage to svp termination

flushing cistern

cistern overflow pipe

floor fin.

wc with 50mmminimum seal 50mm dia. anti- syphonage pipe

inspection eye

1500

12.All inside surfaces of aseptic tank shall be madesmooth with mortar mix C

SCALE (1:25)

DETAIL OF PRE CAST R.C. ACCESS COVER

8 No 6mm Ø bars @ 225 ctrs,

PLAN

1150

11.The floor of a septic tankshall be of concrete mix Dat least 150mm thick andslope to a gradient of not lessthan one in twentydownwards towards the inletpipe.

L.I 139 10.The walls of aseptic tank shall be ofconcrete,plain or reinforcedof at least 150mm thick orconcrete mix C or of burntbrick work of at least 150mmthick set in mortar mix D

20751375

900

600

350

350

350

A

3000225225

350

1375 Cover

Access

1200

1550

2257350

SECTION A - A

1200

C

C

D

D

150 Standard SewageGas Interception Dilution

The War brick or Equivalent

225

1025

125

350 1375

225X225mm R.C Beam

4 No12mmØ Bar

Top water level

50mm Pre cast Concrete Access Cover

4700

350

3450

125

100mm R.C Slab10

25

50 Blinding

525

350

4700

DETAIL OF EFFLUENT MANHOLESECTION D - D

Bitumen Seat

450

200

150

50 SCALE (1:25)

SCALE (1:25)

600 150

100

700600

- PLAN -50

5055

045

0

SECTION F - F

600

200

50 50

B r c No 8 or Equivalent17535

015

5052

510

2535

047

00

3450

50

Top water level accumulated gases are expectedto be expelled througt vent atleast 600m above eaves withopen end protected againstnesting birds

6.The dimensions of onecompartment of a septic tankshall be such that the totallength is at least four timesthe width and where the tankis divided into twocompartments,the length ofthe first compartment shall bemore than half of the totallength of the septic tank.

LEACHING CHAMBERLENGTH

1.05m

1.35m1.43m

1.58m

225

Cover

Access

1550

2251500

350

225

2252

25

350

Cover

Access 350600600 1550

2400

3300

2252

25

A

USER CAPACITYNO OF PERSONS

DIGSTIONS CHAMBERLENGTH WIDTH

10-14

15-20

21-25

26-30

31-35

36-40

2.1m

2.4m

2.7m2.85m

3.0m

3.15m

1.05m

1.2m

1.2m1.35m

1.5m

1.58m

1.2m

1.5m

STANDARD DIMENSIONS FOR SEPTIC TANK

WIDTH

1.4m

1.05m

1.2m

1.35m

1.5m

1.58m

septic tank must be at least30 meters from any waterbody which be used fordomestic purposes and atsufficient height not to allowfor any pollution through thesoil to such a body.

drain should be givingsufficient fall(eg. in 40 for100mm pipe)joints should be properlymade to prevent blocking ofthe aperture

septic tank must beconstructed in concrete withthe top at least 150m aboveground leveloverall depth of septic tankbelow ground level isdetermined by the inlet andshall not be less than 1800mthe depth below inlet levelshall also be 1400-1500mmand any case nnot less than1200mmbaffle screen must beprovided to prevent directflow belween inlet and outletseptic tank should be openevery six months and depthof top crust ascertained ifthis exceed 30cm surplusshould be removed andburied

SCHEMATIC SECTION

p.v.c main pipe toseptic tank

1:4:8 50mm Blinding

Bitumen Seat

1375

inspection chamber

50mm main waste waterpipe to soak pit

100mm Ø

BASIN

SINKBATH

URINAL

VIII

VI

VII

V

IV

VIII

IIIW.C

SCHEMATIC SECTION

gully

inspection chamber

vent pipe

NOTESair should be exiuded fromtank to encourage growth ofanacrobic bacteriaflow of effluent

350

I

II

1

350

gully

2

A

B

FF

WIRE BALLOON

4 VENT PIPE