Welcome to Defender Canada! 
Forespar MF 846 Vent Barb Assembly - 903004
$12.65
Forespar MF 846 Vent Barb Assembly - 903004 Item # 866013
Description
Features:
- The Forespar MF846 vent barb assembly is an option that can be used in place of the standard MF841 cap / duckbill
- This option allows venting to the outside of the hull via a 1/4" hose
Note: Forespar threaded plumbing fittings, like most true marine plumbing fittings, use NPSM threads (National Standard Free-Fitting Straight Mechanical Pipe Thread). NPT (National Pipe Threads) are tapered, NPSM Threads are parallel. The two types are not designed to work together.