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Moen Solutions

Bathroom Faucet Drain: Modifying A Non Overflow Drain

Can I modify a non overflow style drain to be used in a sink with an overflow? Overflow drains have a hole in the upper drain assembly that lines up to a channel in an overflow style sink. This prevents sinks from overflowing with water when the drain is closed or clogged. If an incompatible style of drain is installed, water can leak under the sink. If the sink has an overflow and the drain does not, Moen does not recommend modifying the drain. You can replace the drain with an overflow drain:

  • Push Down Drain: 186478 (multiple finishes available, see for more details)
  • All Metal Drain: 10790 (multiple finishes available, see for more details)
  • All Plastic Drain: 151018 (multiple finishes available, see for more details)

For more information on drains, visit Bathroom Faucet Drains.

Example of overflow sink with overflow drain:

example sink with drain.png

For additional information on Moen products visit and select the type of product you are repairing. The guide will contain repair details, troubleshooting and specific information on assembling handles associated with that style of product.

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