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Serving all of the USA, Canada, Australia and the Middle East, MIFAB can provide you with the quality, engineered plumbing and drainage solutions you need. Innovative product designs save the installer time and material cost and provides the owner with higher quality cast stainless steel drains and cleanouts for the same cost as the industry standard nickel bronze. Contact us today to learn more.

All Categories  > Trap Seal Primers and Water Hammer Arrestors  > MI-DU Trap Seal Primer Distribution Unit
MI-DU Trap Seal Primer Distribution Unit

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MIFAB's MI-DU trap seal primer distribution unit is engineered to receive a metered amount of water from a trap seal primer and distribute the water equally to either two, three or four floor drain traps. Choose from either 1/2" or 5/8" compression connections by indicating suffix (-500) for 1/2" or suffix (-625) for 5/8". The lid of the distribution unit has the numbers "2", "3" and "4" marked on it. The body of the distribution unit has a guide marker on the top of the body.
The numbers and the guide marker are positioned by removing the three screws in the lid of the unit and rotating the lid to match the appropriate numbers with the guide marker to provide priming for the desired number of drains. Do not over torque the three lid screws when securing the lid back to the body. It is not necessary to install MIFAB's distribution unit perfectly level. The unique design will distribute water uniformly when out of level.

Trap Seal Primer Distribution unit that serves two, three or four floor drain traps.

Model MI-DU is listed with I.A.P.M.O. U.S. Patent # 6,142,178.

Shipping Weight

0.75 lbs.

Item Name

MI-DU Trap Seal Primer Distribution Unit


MI-DU Trap Seal Primer Distribution Unit

Carton Qty.


Carton Weight

Dimensional Drawing
File Not Found

4.50 lbs.

Compression Size
Outlet Size

1321 West 119th Street Chicago, IL 60643
Toll Free: 800.465.2736
Tel: 773.341.3030
Fax: 773.341.3047
E-mail: sales@mifab.com