Aeration Basin Diffusers and Parts

The City of Dallas (the “City”) is soliciting bids to establish a five-year Indefinite Delivery/Indefinite Quantity (ID/IQ) master agreement for aeration basin diffusers and parts for use at Dallas Water Utilities treatment plants. An ID/IQ contract is established when quantities and/or delivery schedules cannot be determined. Goods will be ordered on an as-needed basis during the term of this contract.

The City of Dallas is seeking competitive bids for the procurement and delivery of aeration basin diffusers, including tubular and free-floating membrane units, to support operations across various Dallas Water Utilities treatment plants. The scope encompasses the supply of new, factory-certified equipment delivered directly to designated municipal water and wastewater facilities in accordance with established municipal delivery and invoicing procedures.

The tubular diffusers specified in section A consist of a 24.5-inch-long PVC pipe with a diameter of 2.6 inches, comprising a quantity of 10,000 units, and feature a flexible membrane, stainless steel nipple, check valve system to prevent the intrusion of water and solids, and stainless-steel clamps, with an airflow rating of 2-8 SCFM or 3-14 m3/hr. The circular diffusers specified in section B consist of a quantity of 8,000 units of IFU D520, 20.08-inch diameter Free Floating Rex-Flex Membrane diffusers that consistently produce 1-3 mm fine bubbles. All diffusers offered must function as self-cleaning, non-clogging devices equipped with an integrated back-flow system.

The awarded vendor must deliver all goods within sixteen weeks of order placement, with all freight and transportation charges included under a free on-board destination term to designated City of Dallas water utilities treatment plants. [...] Substitutions are not allowed for this solicitation.

All material/products provided shall be new and warrantied to be free from defects in workmanship, design, and materials. The warranty period shall be 5 years from date of installation.

**Submission method:** To be considered responsive, bids must be submitted electronically through the City’s solicitation portal by the due date and time indicated in the solicitation. All Bidders must scan and upload a copy of their **$100.00** bid security (sealed bid bond, certified check or cashier’s check) as an attachment to their bid.

The Contract or Agreement will be for a term of 5 years with no renewal option. The City reserves the right to extend or not to offer an extension.

The City’s intent is to award this solicitation to the lowest responsible bidder by group, for Group 1 thru 2 and by approved Brands (Wallace and Tiernan, ITT Sanitaire, Environmental Dynamics International, and SSI Aeration Industries) for Group 3 to the responsive and responsible bidder(s) with the most advantageous percentage Discount or Markup (+/-) and has demonstrated compliance with the specifications. NO substitute allowed for this solicitation.

Bids will only be considered from Bidders who have been established in the business of providing aeration basin diffusers and parts for Dallas Water Utilities treatment plants for a minimum of 5 years.