5 Baker Water Systems - Monitor Division • Evansville, WI 53536 800-356-5130 • [email protected] • www.bakermonitor.com SAMPLE ENGINEERING SPECIFICATIONS FOR PITLESS UNITS PART 1 GENERAL 1.01 SUMMARY A. Section Includes: Complete assembled Pitless Unit System including well cap, lift-out bail, hold down hooks, lift-out pipe, discharge body with support rings or ribs, spool with pressure equalizing passages, and certified to NSF/ANSI 61 & 372. 1.01.1.1 SUBMITTALS A. All bidders shall submit as part of their bid: 1. The Manufacturer and Model of the Pitless Unit to be installed. 2. Detailed Specifications with Drawings of the System furnished by the manufacturer. PART 2 PRODUCTS 2.01 PITLESS UNIT The Pitless Unit must be Certified to NSF/ANSI 61 & 372, equal to Baker Manufacturing Company, Monitor Division, Model ________________________. The unit should be factory assembled, before shipping to the site. The pitless unit must conform to the Recommended Standards for Water Works, Great Lakes Upper Mississippi River Board of State Public Health & Environmental Managers, Health Education Services, Albany, NY., and/or Water Systems Council PAS-97 (2012). 2.01.01 WELL CAP The Watertight Cap shall be secured to the pitless casing with a compression gasket. The top of the cap can be removed without affecting the sealed conduit or wiring. The heavy duty watertight cap will have a separate protected downward facing stainless steel screened well vent with pipe nipple. Construction of the cap and well vent will be of heavy duty gray cast iron and E-coated with a green enamel finish. 2.01.02 UPPER CASING The Upper Casing must be factory assembled to the discharge body, and the lift-out and hold down mechanism are factory assembled to the spool. Upper casing thickness must conform to the Recommended Standards for Water Works, and be coated with a rust protective coating. The upper casing must provide a watertight connection from the discharge body to the well cap. The discharge port center line to be __________ feet below grade, and the pitless upper casing to extend _________ feet above grade. 2.01.03 SPOOL The spool shall include ______NPT per ANSI B 1.20.1 male or female drop pipe connection and shall be constructed of lead-free galvanized heavy duty gray cast iron, ductile iron, or steel with a lead-free galvanized plating on the wetted surface of over .010 inches thick. The spool will have o-ring grooves machined into the spool retaining the o-rings when setting or pulling the system. The positive pressure O-ring seals shall be constructed of neoprene or equivalent. Spool shall be designed to accommodate probe tubes and provide NPT ports for discharge pressure taps. O-ring protection shall be provided to prevent the seals from dragging on the upper casing when the pump is installed or removed. 2.01.04 DISCHARGE BODY The Discharge Body shall be constructed of lead-free galvanized ductile iron or lead-free galvanized steel. O-ring seat to be designed to prevent crevice and galvanic corrosion, dissimilar metals should be avoided. Discharge body designed with reinforcement rings or ribs to prevent distortion due to vertical move- ment of discharge pipe, preventing the spool from binding inside the discharge body. Minimum I.D. of the discharge body to be equal to or greater than I.D. of the well casing for ease in well servicing. 2.01.05 HOLD-DOWN MECHANISM The Pitless Unit spool shall have a hold down mechanism, factory assembled to spool and capable of preventing rotation of the pitless spool relative to the discharge body, at full rated locked rotor torque of the submersible pump motor. The spool must also have a factory assembled lift out pipe and bail, or spider capable of _______lbs. rated load, to allow lifting a water filled drop pipe and pump out of the well for service. Components to be constructed of ductile iron or steel with a corrosion resistant coating. 2.01.06 IN-LINE CHECK VALVE Manufacturer: Flomatic Model Number: __________ Check valve body and follower to be constructed of ductile iron. Valve guide and spring constructed of 316 stainless steel. Maximum pressure rating to be 400 psi. All internal parts to be made from corrosion resistant material. Check valve designed to operate with VFD controlled pumps.
