Aeration Basin Diffusers and Parts

The City of Dallas is soliciting bids for a five-year Indefinite Delivery/Indefinite Quantity master agreement for aeration basin diffusers and parts used at Dallas Water Utilities treatment plants, with questions due November 6, 2026 at 4:00 p.m. and bids due November 20, 2026 at 1:00 p.m. Bidders must be manufacturers or authorized dealers or distributors able to provide manufacturer authorization letters on request, and must have been in the business of supplying aeration basin diffusers for at least five years. No substitutions are permitted. An SBE participation goal of 6.09% applies under the City's Developing Regional & Inclusive Vendor Enterprises (DRIVE) Policy, and recommended bidders must demonstrate good faith effort to meet it.

The solicitation covers two diffuser groups. Section A requires 10,000 tubular diffusers, 24.5 inches long and 2.6 inches in diameter, with a flexible membrane, stainless steel nipple, check valve system, stainless-steel clamps, and an airflow rating of 2–8 SCFM. Section B requires 8,000 circular IFU D520 Free Floating Rex-Flex Membrane diffusers, 20.08 inches in diameter, producing 1–3 millimeter fine bubbles. All products must comply with AWWA standards and NSF/ANSI 61 for drinking water system components.

Ordering is as-needed with no renewal option. The City will award to the lowest responsible bidder offering the most advantageous percentage discount or markup for each group, with pricing firm through the initial term. Pricing is all-inclusive, covering manufacturing, shipping, delivery, insurance, and direct costs on FOB destination terms to the treatment plants, with delivery required within 16 weeks of order placement. Bid security is $100.00 in the form of a sealed bid bond, certified check, or cashier's check. Products carry a five-year warranty from installation, with defective parts replaced within thirty days at no cost to the City. Invoices are submitted monthly, and the City pays within 30 days of receiving a correct invoice. The City reserves the right to extend the contract, reject all bids, or cancel the solicitation.