1. (a) In accordance with §217.6 of this title (relating to Submittal Requirements and Review Process), the design of a distribution system that will convey reclaimed water to a user must be submitted, reviewed, and approved by the executive director before the distribution system may be used.
2. (b) A municipality may be the review authority in accordance with §217.8 of this title (relating to Municipality Reviews), and may approve a reclaimed water distribution system.
3. (c) A distribution system designed to transport Type II reclaimed water, as defined by §210.33(2) of this title (relating to Quality Standards for Using Reclaimed Water), must comply with Subchapter C of this chapter (relating to Conventional Collection Systems), as applicable to the project.

4. (d) A distribution system designed to transport Type I reclaimed water, as defined by §210.33 of this title must meet the following requirements:

   1. (1) Type I reclaimed water gravity pipes must comply with §§217.53 - 217.55, 217.58, and 217.59 of this title (relating to Pipe Design; Criteria for Laying Pipe; Manholes and Related Structures; Testing Requirements for Manholes; and Lift Station Site Requirements).
   2. (2) A design must prevent pipe and bedding displacement.
   3. (3) The design of a pipe must prevent the deposition of solids in a gravity pipe.

5. (e) Each appurtenance designed to handle reclaimed water must be identified.

   1. (1) An above-ground hose bib, spigot, or other hand-operated connection is prohibited, excepted in secured areas of a facility that only trained staff has access to.

   2. (2) An underground hose bib must be:

      1. (A) located in locked, below-grade vaults, and clearly labeled "NON-POTABLE WATER"; or
      2. (B) operated only by a special tool in non-lockable, underground service boxes clearly labeled as non-potable water;
      3. (C) purple; and
      4. (D) designed to prevent a connection to a standard water hose.
   3. (3) Storage areas, hose bibs, and faucets must include signs in both English and Spanish reading "NON-POTABLE WATER, DO NOT DRINK" and "El AGUA NO-POTABLE, NO BEBE."

6. (f) Cross Connection Control and Separation Distances.

   1. (1) A type I reclaimed water pipe must be at least 4.0 feet from a potable water pipe, as measured from the outside surface of each of the respective pipes.
   2. (2) A physical connection between a potable water pipe and a reclaimed water pipe is prohibited.
   3. (3) An appurtenance must prevent any possibility of reclaimed water entering a drinking water system.

   4. (4) Where a 4.0 foot separation distance cannot be achieved, a reclaimed water pipe must meet the following requirements:

      1. (A) If a new Type I reclaimed water pipe is installed parallel to an existing potable water pipe, the reclaimed water pipe must:

         1. (i) maintain a horizontal separation distance of no less than 3.0 feet with a potable water pipe at the same level or above a reclaimed water pipe;
         2. (ii) have a minimum pipe stiffness of 115 pounds per square inch (psi) with compatible joints, or a pressure rating of 150 psi for both pipe and joints;
         3. (iii) is embedded in cement stabilized sand, if parallel to a potable water pipe, is placed in the same benched trench as a reclaimed water pipe; and

         4. (iv) if cement-stabilized sand is used, the sand must:

            1. (I) have a minimum of 10% cement, based on loose dry weight volume;
            2. (II) be a minimum of 6.0 inches above and one quarter of the pipe diameter on either side and below a reclaimed water pipe.

      2. (B) New Type I Reclaimed Water Pipe - Crossing Pipes.

         1. (i) If a new Type I reclaimed water pipe is installed crossing an existing potable water pipe, one segment of a Type I reclaimed water pipe must be centered on a potable water pipe such that the joints of the reclaimed water pipe are equidistant from the center point of the potable water pipe.
         2. (ii) A crossing of the two pipes must be centered between the joints of the potable water pipe.
      3. (C) A Type I reclaimed water pipe must have either a pressure rating of 150 psi for both pipe and joints or a pipe stiffness of at least 115 psi with compatible joints for a minimum distance of 4.0 feet in each direction, as measured perpendicularly from any point on the potable water pipe to the Type I reclaimed water pipe.
      4. (D) The minimum distance between a reclaimed water pipe and any potable water pipe is 6.0 inches.
      5. (E) Any portions of reclaimed water pipe within 4.0 feet of a potable water pipe must be embedded in cement stabilized sand.
      6. (F) The cement stabilized sand must comply with the requirements listed in subparagraph (A) of this paragraph.
7. (g) Site Selection of Type I Reclaimed Water Pump Stations. A design must comply with §217.59(a) - (c) of this title.

8. (h) Design of Type I Reclaimed Water Pump Stations. A design must comply with §§217.60(d) and (g), 217.61(d), and 217.62(a) and (c) of this title (relating to Lift Station, Wet Well, and Dry Well Designs; Lift Station Pumps; and Lift Station Pipes), and paragraphs (1) - (3) of this subsection.

   1. (1) Pump Controls.

      1. (A) All electrical equipment must be operable during a 100-year flood event and be protected from potential flooding from a wet well.
      2. (B) Motor control centers must be mounted at least 4.0 inches above grade to prevent water intrusion and corrosion from standing water in the enclosure.

   2. (2) Pumps.

      1. (A) A pump support must prevent movement or vibration during operation.
      2. (B) A submersible pump must use a rail-type pump support incorporating manufacturer-approved mechanisms designed to allow an operator to remove and replace any single pump without first entering or dewatering the wet well.
      3. (C) Submersible pump rails and lifting chains must be made of a material that is equivalent to Series 300 stainless steel at minimum.

   3. (3) Pump Station Valves.

      1. (A) The discharge side of each pump must include a check valve followed by a full-closing isolation valve.
      2. (B) Check valves must be swing type with an external lever.
      3. (C) All valve types other than rising stem gate valves must include a position indicator to show their open or closed position.

9. (i) Force Main Pipe for Type I Reclaimed Water. A force main pipe for Type I reclaimed water must comply with sections §§217.54, 217.64, 217.65, 217.67(a) - (c) and (e), and 217.68 of this title (relating to Materials for Force Main Pipes; Force Main Joints; Force Main Design; and Force Main Testing) and the following:

   1. (1) A valve casing for an underground isolation valve must include "REUSE" or "NPW" cast into its lid.
   2. (2) A force main pipe must be purple in color or contained in an 8.0 millimeter purple polyethylene sleeve conforming to American Water Works Association C105, Class C and in-line isolation valves for reuse pipes must open clockwise to distinguish them from potable water isolation valves.

Source Note:The provisions of this §217.69 adopted to be effective August 28, 2008, 33 TexReg 6843.