- 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.