Most Danze products that have a "T" in the suffix of the SKU Number will require a valve. Danze trim pieces that require a valve must use a Danze valve and are sold separately. This product will require a valve that is sold separately. Danze will offer some products that are kits and supplied with a valve. In the case of the kit with the valve supplied, the "T" will be absent from the suffix of the SKU Number.