The U.S. aircraft register, updated daily
Parts

Fill

No failure report names the fill. 4 FAA approvals let 4 companies make a replacement fill, Utc Aerospace Systems, Goodrich Sensors & Integrated Systems holding the most (1).

Approved replacement parts 4 parts manufacturer approvals

A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a fill and sell it as an approved part for the models named. These are the companies holding such approvals for a fill:

For these models most: Hawker Beechcraft Corp HAWKER 4000 (1), Embraer ERJ 190 E190 and E195 (1), Boeing 757 (1), Boeing 737 (1).

MakerPartReplacesFitsGrantedStatus
Monogram SystemsFill/Drain Switch, Water Sys 19000-34019000-340Embraer ERJ 190-4002019-07-31current
Rockwell Collins INCFill, Overflow Valve Instl Potable Water 0016-0015-120016-0015-12Boeing 737-102018-02-25current
Utc Aerospace Systems, Goodrich Sensors & Integrated SystemsFill/Overflow Valve Assembly 4E4278-1Beechcraft 4E4278-1Beechcraft Corporation Hawker) (40002016-02-15current
Allen Aircraft ProductsFill/Drain Water Valve 12D1014-1Boeing 10-60784-34Boeing 757-200, 757-300 Series2001-03-27current

Sources: the FAA's service difficulty reports since 1995 (a report is a part that failed and was fixed, as filed by an airline, repair station or owner; the count shows reporting as much as reliability) and the parts manufacturer approvals in the FAA's Dynamic Regulatory System. The part name is the reporters' and the approval holders' own words, reduced to the first plain words so that spellings meet.