Elkhart RV Parts offers a 25-gallon fresh water tank (model T161) that closely matches your SeaRay 240 Sundancer replacement needs. This tank measures approximately 27.75" x 17.75" x 12", is NSF certified for potable water, and is a suitable option given the discontinued OEM tank. While our custom spinweld fitting installation service is temporarily on hold, we can still supply the tank and fittings separately to meet your specifications. The tank includes standard fitting locations, but please verify if the fittings align with your vessel's plumbing. We recommend reviewing the available tanks on our Tank Finder page and contacting us to confirm fitting compatibility or explore alternative fitting options. Orders for the T161 tank can typically be shipped within one to two business days. Our team is ready to assist you in selecting the best replacement your SeaRay 240 Sundancer.