The Hayward Universal H-Series Low NOx is designed specifically for either a positive-pressure or negative-pressure venting system, both have their own factors that determine which one is the best fit.
Please note: Adapter and Vent Stack Not Included
Warranty Coverage: Hayward Parts come with a 1 Year Limited Manufacturers Warranty. The manufacturer warrants these parts against defects on workmanship and materials. This warranty will be void if these parts are damaged as a result of improper installation or use, or if damage is a result of ice. Warranty does not cover any labour charges, cost of lost water or chemicals, or any other damages that may occur.
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