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// CODE SNIPPET

3137B.2 Inlet Fittings

California Building Code 2016 (Vol 1 & 2) > 31B [DPH] Public Pools > 3137B Pool Fittings > 3137B.2 Inlet Fittings
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Each pool shall be provided with not less than two recirculation system inlets for the first 10,000 gallon (37,850 L) capacity and one additional inlet for each additional 10,000 gallon (37,850 L) or less capacity.

3137B.2.1 Construction

Inlet fittings shall not protrude greater than 11/4 inches (32 mm) into the pool and shall be shaped, rounded and smooth.

3137B.2.2 Location

Inlet fittings shall be located no less than 18 inches (457 mm) below the waterline, except for a spa pool or wading pool. Inlet fittings shall be separated by at least 10 feet (3048 mm) and shall be located so as to ensure uniform circulation.

3137B.2.3 Adjustment

Provisions shall be made for adjusting the volume of flow through each inlet. Wall inlets shall be capable of adjusting the direction of flow and to produce sufficient velocity to impart a substantial circulatory movement to the pool water.

3137B.2.4 Floor Inlets

Pools that are greater than 40 feet (12,192 mm) in width or 3,000 square feet (278.7 mm2) in surface area shall have floor-mounted return inlets. The number of floor inlets shall be in compliance with Section 3137B.2. All floor inlet fittings shall be located to provide uniform circulation and shall be installed so as to be flush with the surface of the pool bottom.

FIGURE 31B-1
DEPTHS AND CLEARANCES FOR POOLS WITH DIVING BOARDS GREATER THAN 30 INCHES (762 mm) ABOVE THE WATER LINE

TABLE 31B-1
DEPTH OF WATERLENGTH OF SECTION
BOARDS AND PLATFORMSDIMD1D2D3D4L1L2L3W1W2
1-meter boardMin.5'-6"11'-6"11'-2"0'-0"16'-5"29'-7"5'-11"7'-11"8'-3"
3-meter boardMin.6'-6"12'-6"12'-2"0'-0"19'-9"33'-8"5'-11"8'-7"11'-6"
Notes for Figure 31B-1 and Table 31B-1:
  1. Maximum radius shall equal D2 minus D1 dimensions.
  2. Radius at the shallow end shall not be more than 12 inches.
  3. The length of a section is based on the maximum slope and other maximum and minimum dimensions.
  4. Where there is a break in slope, the break shall be located at a water depth equal to 4'-6".
  5. The springline depth at (4) shall not be more than 4'-0".
  6. The maximum water depth shall be 3'-6".
  7. Each pool shall be provided with a main drain submerged suction outlet typically located at the bottom of the pool that conducts water to a recirculating pump.
FIGURE 31B-2
DEPTHS AND CLEARANCES FOR POOLS WITH DIVING BOARDS 30 INCHES (762 MM) OR LESS ABOVE THE WATER LINE

TABLE 31B-2
DEPTH OF WATERLENGTH OF SECTION
DIMENSIOND1D2D3D4L1L2L3W1W2
Minimum2'-6"8'-6"0'-0"7'-0"6'-0"6'-0"2'-6"30'-0"9'-0"3'-0"
Maximum——3'-6"—10'-0"—4'-0"———
Notes for Figure 31B-2 and Table 31B-2:
  1. Radius at the shallow end shall be a maximum of 1'-0".
  2. Springline D1 shall extend to the break in slope between the shallow area and the deep area.
  3. Maximum radius shall equal D2 minus D1 dimensions.
  4. Where there is a break in slope, the break shall be located at a water depth equal to 4'-6".
  5. Length of section is based on maximum slope and other maximum or minimum dimensions.
  6. Each pool shall be provided with a main drain submerged suction outlet typically located at the bottom of the pool that conducts water to a recirculating pump.
FIGURE 31B-3
DEPTHS AND CLEARANCES FOR POOLS WITHOUT DIVING BOARDS
TABLE 31B-3A
POOLS WITH MAXIMUM WATER DEPTH ≤ 6'0"
DEPTH OF WATERLENGTH OF SECTION
DIMENSIOND1D2D3L1L2L3W1
Minimum2'-6"—0'-0"3'-6"3'-0"3'-0"6'-0"
Maximum—6'-0"3'-6"————
TABLE 31B-3B
POOLS WITH MAXIMUM WATER DEPTH > 6'0"
DEPTH OF WATERLENGTH OF SECTION
DIMENSIOND1D2D3L1L2W1
Minimum2'-6"> 6'-0"0'-0"3'-6"3'-0"7'-6"
Maximum——3'-6"———
Notes for Figure 31B-3 and Tables 31B-3a and 31B-3b.
  1. Radius at the shallow end shall be a maximum of 1'-0".
  2. Springline D1 shall extend to the break in slope between the shallow area and deep area.
  3. Maximum radius shall equal D2 minus D1 dimensions.
  4. Where there is a break in slope, the break shall be located at a water depth equal to 4'-6".
  5. Each pool shall be provided with a main drain submerged suction outlet typically located at the bottom of the pool that conducts water to a recirculating pump.

Related Code Sections


3137B.2 [DPH] Public Pools, Inlet Fittings
Inlet fittings shall not protrude greater than 1 1 / 4 inches (32 mm) into the pool and shall be shaped, rounded and smooth ...
California Building Code 2016 (Vol 1 & 2) > 31B [DPH] Public Pools > 3137B Pool Fittings > 3137B.2 Inlet Fittings
3137B.2 [DPH] Public Pools, Inlet Fittings
Inlet fittings shall not protrude greater than 1 1 / 4 inches (32 mm) into the pool and shall be shaped, rounded ...
California Building Code 2019 (Vol 1 & 2) > 31B [DPH] Public Pools > 3137B Pool Fittings > 3137B.2 Inlet Fittings
704.1 Sanitary Drainage, Inlet Fittings
Drainage piping shall be provided with approved inlet fittings for fixture connections, correctly located according to the size and type of fixture ...
California Plumbing Code 2016 > 7 Sanitary Drainage > 704.0 Fixture Connections (Drainage) > 704.1 Inlet Fittings
704.1 Sanitary Drainage, Inlet Fittings
Drainage piping shall be provided with approved inlet fittings for fixture connections, correctly located according to the size and type of fixture ...
California Plumbing Code 2019 > 7 Sanitary Drainage > 704.0 Fixture Connections (Drainage) > 704.1 Inlet Fittings
H701.9 Private Sewage Disposal Systems, Inlet Fitting
An approved vented inlet fitting shall be provided in the seepage pit so arranged as to prevent the inflow from damaging the sidewall ...
California Plumbing Code 2019 > H Private Sewage Disposal Systems > H701.0 Seepage Pits > H701.9 Inlet Fitting
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