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Moen Solutions

100000 and 101879 Spout O-Ring

A step-by-step instruction guide to replacing the spout o-ring kit.

Preparation: The water supply shut off valves must be turned off- see article How to Turn Off the Water Supply to the Faucet.



1. Unscrew spout nut (#2) counter-clockwise.  1111111111111111111111111111111111 


2. Pull spout assembly (#1) off of the valve body (#5). Remove black rubber O-ring (#4) and white nylon split washer (#3).


3. Lubricate the black rubber O-ring  (#4) with the silicone provided P/N:99915.


4. Place the white nylon split washer (#3) in upper channel and the O-ring (#4) in the lower channel. 11


5. Insert the spout (#1) and push firmly until white nylon split washer (#3) hits against brass valve body (#5).


6. Tighten the spout nut (#2) clockwise until tight.   11111111111111111111111111


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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