14x25x2 Pleated MERV 7 Air Filters 12 Pack commercial-lighting-fixture The material is Polyurethane which

The material is Polyurethane which is easy to cut to size

When water starts to flow

Pumping raw air into the nutrient solution

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The FloraFlex Air Bleed Valve (3/4'') can be installed on any mainline to prevent air locks

14x25x2 Pleated MERV 7 Air Filters 12 Pack commercial-lighting-fixture The material is Polyurethane whichNordic Pure MERV 7 Pleated AC Furnace Air Filters provide exceptional filtration for both home and commercial environments. Each time air passes through a Nordic Pure pleated furnace air filter, lint, dust, pollen, bacteria, pet dander, dust mites, mold spores and other contaminants are removed. MERV 7 furnace filters are comparable to HVAC filters with the rating of MPR 600. While different companies use different scales to measure the air filters