1. (a) All visible piping, including waste lines and valves and other fittings, shall be:

   1. (1) Color coded as specified in (b), below;
   2. (2) Labeled to identify its purpose; and
   3. (3) Marked to show the direction of flow.

2. (b) Unless otherwise specified in an applicable plumbing or building code or local ordinance, the color coding required by (a), above, shall be as specified in Table 1109-1, below:

   Table 1109-1: Color Coding for Visible Piping, Valves, and Fittings

   Purpose

   Color

   Potable Water

   Dark blue

   Skimmer or Gutter

   Olive Green

   Pool Return

   Light blue

   Main Drain

   Black

   Alum

   Orange

   Chlorine, gas or solution

   Yellow

   Soda Ash

   White

   Acid

   Pink

   Backwash

   Dark Brown

   Sewer or other wastewater

   Dark Gray

   Deck Drains

   Light Brown

   Gas other than chlorine or compressed air

   Red

   Compressed Air

   Dark Green

3. (c) If plastic pipe is proposed, a minimum of Schedule 40 rigid PVC or equivalent that can withstand operating pressures shall be used.
4. (d) Flexible pipe shall not be used for pools.
5. (e) Flexible PVC hoses that meet NSF Standard 50 may be affixed to spa shells where rigid pipes do not provide the necessary angles to connect circulation components.
6. (f) Piping shall be designed to carry the required quantity of water at a maximum velocity not to exceed 6 fps for suction piping, and not to exceed 10 fps for discharge piping except for copper pipe where the velocity shall not exceed 8 fps.
7. (g) Return lines, main drain lines, and surface overflow system lines shall each be equipped with proportioning valves.

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 1106.06)