Track Pans - Grate only for Center Pan with Stormwater Feature - Left grate Part #9571

FAQs Resources & Docs Compliance & Regs Additional Info. Frequently Asked Questions What is the flow rate for each drain? 120 gallons-per-minute (gpm). But polypropylene is cheaper than Ultra-Filter-Tex! Is it though? When you simply compare the cost per foot (or inch), then yes, it is cheaper. But when you take a closer look and consider how much more Ultra-Filter-Tex absorbs, you will quickly see that not only is Ultra-Filter-Tex the better choice from a performance standpoint but it is also the better choice from a cost standpoint. Take a look at this example. How much containment capacity do the Ultra-Track Pans have? Without grates, each center track pan holds 30 gallons and each side track pan holds 25 gallons. Each track pan grate displaces 6 gallons of fluid. Therefore, each center track pan with grates holds 18 gallons and each side track pan with grates holds 19 gallons. Ultra-Track Pans are connected together with bulkhead fittings. One (1) bulkhead fitting