PTS Senders (threaded):
1-1/2" NPT threaded pneumatic tank sender, 12" for freshwater and holding tanks
PFS Senders (flanged, standard 5 bolt pattern):
5-Hole flanged pneumatic tank sender, 12" for freshwater and holding tanks
The West Advisor
The West Advisor articles have answered boaters' questions and provided solutions to boating problems for more than 20 years. West Marine has compiled one of the Web's most comprehensive collections of technical boating information articles.