3137B.2 Inlet Fittings
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.
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.
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.
DEPTHS AND CLEARANCES FOR POOLS WITH DIVING BOARDS GREATER THAN 30 INCHES (762 mm) ABOVE THE WATER LINE
| DEPTH OF WATER | LENGTH OF SECTION | |||||||||
| BOARDS AND PLATFORMS | DIM | D1 | D2 | D3 | D4 | L1 | L2 | L3 | W1 | W2 |
| 1-meter board | Min. | 5'-6" | 11'-6" | 11'-2" | 0'-0" | 16'-5" | 29'-7" | 5'-11" | 7'-11" | 8'-3" |
| 3-meter board | Min. | 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:
- Maximum radius shall equal D2 minus D1 dimensions.
- Radius at the shallow end shall not be more than 12 inches.
- The length of a section is based on the maximum slope and other maximum and minimum dimensions.
- Where there is a break in slope, the break shall be located at a water depth equal to 4'-6".
- The springline depth at (4) shall not be more than 4'-0".
- The maximum water depth shall be 3'-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.
DEPTHS AND CLEARANCES FOR POOLS WITH DIVING BOARDS 30 INCHES (762 MM) OR LESS ABOVE THE WATER LINE
| DEPTH OF WATER | LENGTH OF SECTION | |||||||||
| DIMENSION | D1 | D2 | D3 | D4 | L1 | L2 | L3 | W1 | W2 | |
| Minimum | 2'-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:
- Radius at the shallow end shall be a maximum of 1'-0".
- Springline D1 shall extend to the break in slope between the shallow area and the deep area.
- Maximum radius shall equal D2 minus D1 dimensions.
- Where there is a break in slope, the break shall be located at a water depth equal to 4'-6".
- Length of section is based on maximum slope and other maximum or minimum dimensions.
- 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.
DEPTHS AND CLEARANCES FOR POOLS WITHOUT DIVING BOARDS
| DEPTH OF WATER | LENGTH OF SECTION | ||||||
| DIMENSION | D1 | D2 | D3 | L1 | L2 | L3 | W1 |
| Minimum | 2'-6" | — | 0'-0" | 3'-6" | 3'-0" | 3'-0" | 6'-0" |
| Maximum | — | 6'-0" | 3'-6" | — | — | — | — |
| DEPTH OF WATER | LENGTH OF SECTION | |||||
| DIMENSION | D1 | D2 | D3 | L1 | L2 | W1 |
| Minimum | 2'-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.
- Radius at the shallow end shall be a maximum of 1'-0".
- Springline D1 shall extend to the break in slope between the shallow area and deep area.
- Maximum radius shall equal D2 minus D1 dimensions.
- Where there is a break in slope, the break shall be located at a water depth equal to 4'-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.