#3 Regular Winter Plug SP203 The Technical Products #3 Regular Winter Plug is specifically designed to seal 3/4-inch tubes or pipes in pool and spa plumbing during winterization. This high-quality rubber expansion plug helps protect your plumbing lines from freeze damage when pools or spas are closed for the season. Key Features & Benefits Sized for 3/4-inch tubes, providing a secure and reliable seal to block water and prevent freeze damage. Durable materials include high-quality rubber, marine-grade stainless steel, and heavy-duty nylon for corrosion resistance and long service life. Easy installation with an ergonomic wing nut that expands the plug inside the pipe for a strong, watertight seal without tools. Versatile use for returns, skimmers, main drains, and spa jets, making it a must-have for winter pool and spa care. Reusable year after year, offering cost-effective protection for your plumbing lines. Specifications Model: #3 Regular Winter Plug SP203 Fits: 3/4-inch tube or pipe (approx. 0.89" diameter) Materials: Rubber expansion plug, stainless steel screws, nylon wing nut Application: Designed for winterizing pool and spa plumbing lines to prevent freeze damage during colder months This plug is an essential pool closing tool that delivers peace of mind by ensuring your plumbing stays secure and protected throughout the winter season.