Replacement 90 Gallon Fresh Water Tank for 2010 Tiffin Allegro Red

Asked by John from Hudson, FloridaAsked on March 23, 2026Answered by Elkhart RV Parts
Verified Purchase Customer Kept This Part Purchased: Elkhart Plastics - 29 Gallon RV Holding Tank 45x15.5x12.375 - H1296 Black Gray Water Tank, Universal Holding Tank Fittings Kit w/ Level Sensors for Black Water and Grey Water RV Tanks
Customer Question

Is a 90 gallon replacement freshwater tank available for a 2010 Tiffin Allegro Red? What options do you have, and can I pick one up in Elkhart in late June?

Expert Answer

For your 2010 Tiffin Allegro Red, the recommended replacement freshwater tank is the Alpha 90 Gallon Fresh Water Tank (Model 721BLANK), measuring 60" long by 48" wide by 7.5" high. This tank is a common industry standard for Class A diesel pushers from that era and is compatible with your coach. If your freshwater bay has more vertical clearance, you might also consider the Alpha 98 Gallon Fresh Water Tank (Model 770BLANK), which is 56" long by 41.5" wide by 12" high and slightly taller with a smaller footprint. Both tanks are available in our Elkhart inventory and can be picked up in person. Additionally, we offer custom fitting installation services, including spin welding up to five parts into the tank you purchase. We recommend confirming your current tank’s dimensions before your visit to ensure the best fit. Feel free to stop by the Elkhart RV Resort around late June to pick up your replacement tank.

Product Comparison

Feature Alpha 90 Gallon Tank (721BLANK) Alpha 98 Gallon Tank (770BLANK)
Capacity (Gallons) 90 98
Dimensions (L x W x H) 60" x 48" x 7.5" 56" x 41.5" x 12"
Shape Flat and wide Boxier and taller
Price $588.35 $633.24
SKU 721BLANK 770BLANK

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