RNPCP Appendix A and B

通報

問題一覧

2.31ft of head

1 psi

Minimum pressure for a group containing flushometer valves

103kPa or 15psi

Minimum pressure for a group containing flush tanks

55.16kPa or 8psi

Multiplier to the elevation above the water main to determine loss in static pressure

9.79

Multiplier to the total demand for fixtures with combined hot and cold water to arrive in maximum separate demands

75%

Maximum velocity of water for sizing supply piping

3m/s

Minimum area of trench bottom for disposal field

14sq.m

Sidewall area below the leach line may be added to the trench bottom absorption area

305mm to 914mm (1' to 3')

Where leaching beds are permitted in lieu of trenches, the area of each bed shall be at least ____ greater than the tubular requirements for trenches

50%

Separation distance of leach bed excavation from the water table

1.5m

Separation distance of seepage pit excavation from the water table

Minimum number of compartments of a septic tank (as per plumbing code)

Minimum number of compartments of a septic tank (as per new ordinance)

Minimum capacity of inlet compartment

2/3 of tank capacity

Minimum liquid capacity of inlet compartment

2cu.m

Minimum length of inlet compartment

1.5m

Minimum width of inlet compartment

0.9m

Minimum capacity of secondary compartment

1/3 of tank capacity

Minimum capacity of secondary compartment

1cu.m

Minimum length capacity of secondary compartment if tank has over 6cu.m capacity

1.5m

Length of inlet compartment to be provided with additional manhole

more than 3.7m

Minimum number of manholes for septic tank

Minimum dimension of a manhole

508mm or 20"

Minimum size of the vertical leg of the inlet and outlet fitting

104.6mm

Minimum horizontal dimension of baffle type fitting when measured at the inlet and outlet pipe inverts

106.6mm

Minimum extension of inlet and outlet pipe or baffle above the water surface

101.6mm or 4"

Minimum extension of inlet and outlet pipe or baffle below the water surface

304.8mm or 12"

Minimum vertical clearance of the inlet pipe invert above the outlet pipe invert

50.8mm or 2"

Minimum extension of sidewalls above the liquid depth

228.6mm or 9"

Minimum vertical clearance of septic tank cover above the back vent openings

50.8mm

Minimum extension of partitions or baffles above the liquid level

101.6mm or 4"

Minimum size of an inverted fitting, installed in the inlet compartment side of the baffle with the bottom placed midway the liquid depth

104.6mm

Minimum earth load support capacity of septic tank covers, when the maximum coverage does not exceed 9m

14.4 kPa

Minimum extension of bituminous coating below the water line of concrete septic tanks and shall cover all of the internal area above that point

101.6mm

Minimum wall thickness of steel septic tank, internally and externally protected from corrosion

GA 12 (2.8mm)

Ranking depth to remove loose materials from trenches before placing filter material

25.4mm or 1"

Varying sizes of clean stone, gravel, slag or similar filter material to be placed on the trench

19.1mm to 63.5mm (3/4" to 2 1/2")

Termination of filter material from the seepage pit excavation when used in combination with disposal fields

1.5m

In distribution box, minimum vertical clearance of the invert of inlet above the inverts of outlets. Length of each line where dosing tank is required

25.4mm

Length of each line where dosing tank is required

> 152.4mm

Intervals of sewage discharge from the dosing tank through automatic siphon or pump

3-4 hrs

Number of siphons or pumps to be provided when total length of pipe exceeds 304.8 linear meters

Minimum number of drain lines per field

Maximum length of each line in a disposal field

305m

Minimum bottom width of trench

457.2mm or 1.5'

Maximum bottom width of trench

914.4mm or 3'

Minimum depth of earth cover of drain lines

304.8mm or 1'

Recommended depth of earth cover of drain lines

457.2mm or 1.5'

Minimum thickness of filter material under drain lines

304.8mm or 1'

Minimum thickness of filter material over drain lines

50.8mm or 2"

Minimum spacing between leaching beds

1.2m

Horizontal spacing of distribution drain lines center-to-center

1.8m

Distance of the perimeter of leaching bed from a distribution line

0.9m

A cesspool without septic tanks may be installed when a public sewer will be available in less than:

2 years

Minimum sidewall of cesspool below inlet; nit more than 3.1 meters in depth when 1.2 m thick pervious strata is found

6.1m

Minimum sidewall of cesspool below inlet, when 1.2 m thick pervious strata is found

3.1

In cesspool, the minimum extension of vented leg downward into an existing pit

304.8mm or 1'

In cesspool, the minimum vertical clearance of the outlet flow line below the inlet, when overflow pits are added to existing installations

152.4mm or 6"

Minimum number of compartments for interceptors

Minimum horizontal distance of tree from septic tanks, seepage pits or cesspools

When disposal fields and/or seepage pits are installed in sloping ground, the minimum horizontal distance between any part of the leaching system and ground surface

4.6m

In seepage pit, minimum extension of vented leg fitting below the inlet fitting

304.8mm or 12"

Minimum diameter of seepage pit

2.2m

Minimum thickness of seepage pit concrete wall

101.6mm or 4"

Thickness of concrete block in seepage pits to be chamfered

304.8mm or 12"

In seepage pit, minimum thickness of clean 19.1 mm gravel or rock in excavation voids behind the brick, block or concrete liner

152.4mm or 6"

Minimum compressive strength of brick or block in seepage pit construction

17225 kPa

Minimum sidewall of seepage pit below the inlet

3m or 10'

Minimum thickness of cement mortar covering for seepage pit arch or dome

50.8mm or 2"

Minimum extension mortar covering beyond the sidewalls of the seepage pit

152.4mm or 6"

Minimum thickness of reinforced concrete slab cover of seepage pit

127mm or 5"

Minimum earth load support capacity of slab cover for seepage pit

19.2 kPa

Minimum dimension of inspection hole for seepage pit

228.6mm or 9"

Depth of top of seepage pit arch or cover below the surface of the ground

457.2mm to 1.2m (1.5' to 4')

Maximum Absorption capacity for Coarse Sand or Gravel

203.7 L/sq.m

Maximum Absorption capacity for Fine Sand

162.9 L/sq.m

Maximum Absorption capacity for Sand Loam or Sand Clay

101.9 L/sq.m

Maximum Absorption capacity for Clay with considerable sand or gravel

44.8 L/sq.m

Maximum Absorption capacity for Clay with small amount of sand or gravel

33.8 L/sq.m

YT1 Materials Engineer EXAM

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RNPCP Chapter 1 to 5

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Plumbing Code 5

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Plumbing Code 6

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