- (a) Return inlets shall comply with Env-Wq 1108.22(a)(1).
- (b) At least one return inlet shall be provided per 20 gallons per minute (GPM) of total design circulation flow.
- (c) Inlets shall be located and directed to provide uniform circulation and uniform disinfectant residual.
- (d) Inlets installed in a pool’s walls shall be spaced a maximum of 20 feet, center of inlet to center of inlet, around the periphery of the pool.
- (e) Inlets installed in a pool’s bottom shall be evenly spaced.
- (f) The return water flow for each inlet shall not exceed 20 GPM.
- (g) The water velocity through each inlet shall not exceed 20 feet per second (fps).
- (h) Inlets shall be adjustable to allow for changes in direction of flow.
- (i) The flow rate at all inlets shall be balanced, which may be accomplished by connecting the inlets by a continuous loop of pipe.
- (j) Inlets shall be designed so as to not constitute a hazard to the user.
- (k) Inlets in pools with perimeter overflow systems shall be at least 8 inches below the overflow lip.
- (l) In any pool wider than 20 feet, wall inlets shall be permanently directed to half the distance to the longitudinal centerline of the pool.
- (m) At least one inlet shall be located in each recessed stairwell or other space where water circulation might be impaired.
Source. (See Revision Note #1 at chapter heading for Env-Wq 1100) #8468, eff 11-1-05; ss by #10577, eff 5-1-14 (See Revision Note #2 at chapter heading for Env-Wq 1100); ss by #13198, eff 5-1-21 (see Revision Note #3 at chapter heading for Env-Wq 1100) (formerly Env-Wq 1106.03)