The A. O. Smith MDX-5 In-Line pump tank is designed with an interior powder coating that is permanently bonded to the tank shell for the best protection. It also has a long life span thanks to the addition of a heavy-duty butyl rubber diaphragm.

Water leaks and air loss are prevented with the positive lock retention system that controls the compression in the diaphragm connection.

Made in the USA.


  • In-line Vertical design
  • High gloss exterior powder coat finish prevents corrosion and give protection from UV Rays
  • Air Charge Valve is conveniently located for ease of use
  • Fused Interior Water Chamber helps stop internal corrosion
Volume4.6 gallons
Drawdown 20-401.7 gallons
Drawdown 30-501.4 gallons
Connection Size3/4 NPT (M)
Approx. Shipping Weight9 lbs