Gerber Wrightwood Elongated Toilet – Costco Sale! by Rhonda October 21, 2022 *UPDATE* 8/29/22. The Gerber Wrightwood Dual Flush Elongated Complete Toilet Kit from Costco is two-piece, high-efficiency toilet that is WaterSense certified and features a two-button dual flush actuator. The Wrightwood … 0 FacebookTwitterPinterestEmail