5 Colo. Code Regs. § 1003-5-3.16
The piping system shall be so designed to reduce friction losses to a minimum with maximum flowrate. The maximum rate of flow in suction plumbing shall not exceed 7 feet per second. The maximum rate of flow in return plumbing shall not exceed 10 feet per second. Flanged joints or unions shall be inserted at intervals to permit any part of the system to be taken down for cleaning or repairs. The piping system of the pool shall be labeled and color coded to identify filtered water, raw water, wastewater, vacuum cleaning lines and heating lines. The color code shall be as follows:
Raw Water | Yellow |
Filtered Water | Green |
Wastewater | Black |
Heated Water | Red |
Vacuum Cleaning Lines | Blue |
A vacuum gauge shall be installed in the suction line prior to the pump. A flow meter shall be provided to measure the total flow of the system. Flow meters shall be placed on a pipe length of no less than eight (8) feet and away from elbows and other flow restrictive equipment in accordance to manufacturer's specifications. Directional flow arrows shall be in place on all lines. A complete schematic diagram of the entire pool system shall be in place in the mechanical room and be of such size and design as to be easily read. It shall be of such construction so as to remain in good condition and readable at all times. The schematic shall include a valve legend, pump schedule and complete operating instructions for the entire system.
5 CCR 1003-5-3.16