*Free Ground Shipping Rules and Exclusions:
Free Ground Shipping offer is valid for orders placed online within the contiguous 48 states (AK, HI, PR, VI and international orders are excluded). Offer subject to change or cancellation without notice. Free Ground Shipping is valid on all small parcel standard ground shipping via USPS, UPS or FEDEX. Multiple orders may be consolidated if shipping to the same address. Free Ground Shipping not valid on water tanks, Optimax filters, any products with additional flat-rate shipping options or most orders requiring motor freight, unless otherwise specified in product descriptions. Offer not valid for customers who participate in any freight collect, 3rd party billing, consignee billing program or dealer/reseller discounted items. Offer is not applicable for credit toward any premium air upgrades or other expediting services.