This durable fill valve is ideal since the float is contained inside the valve box. No chance of damaging unit when lifting pumps in or out of skimmer. Delivers up to 245 GPH at maximum of 55 PSI. Includes fitting to connect to 1/2" vinyl tubing. Fits in small or large skimmer. Measures 71/2" long x 3" wide x 4" high. These box style valves replace water lost due to evaporation or small leaks in ponds and Just-A-Falls systems. Easily mounts inside skimmer!