EXHAUST TRANSOM FITTINGS

When the Halyard Exhaust Thru-Hull Fitting was designed, we set out to achieve a make of product which was infinitely stronger than the plastic and GRP units on the market – and tougher than most stainless units.
The Halyard Thru-Hull uses 3mm thick 316 stainless to ensure that the risks of damage when manoeuvring a craft are reduced to the absolute minimum. All units are designed so that the flap, at rest, is shrouded by the stainless rim to prevent damage if the vessel nudges a harbour wall.
 

Through Hull Fittings – Neoprene Flap
Units to accept exhaust hose up to and including 100mm (4") hose have neoprene flaps. Each has a really generous tail allowing "T" bar exhaust hose clamps to be used to secure the hose. Smaller sizes have 3 countersunk fixing holes. The 90mm and 100mm (3.5" and 4") units have 4 bolt holes and a bolting flange which fits right around the unit inside the hull.
 

Through Hull Fittings – Stainless Flap
Units from 125mm (5") upwards all have stainless flaps lined with neoprene. All have tails with plenty of space to use proper "T" bar clamps to secure the hose. Between 4 and 8 bolt holes are provided and all units have bolting flanges to fit around the unit inside the hull. Sizes to suit up to 300mm (12") hose are currently manufactured, and they are a normal stock item up to 254mm (10").

Old
Part No.

A

B

C

E

Fixing

G

Number
of Fixing Holes

Flap Material

Bolting Flange

mm

inch

mm

mm

mm

PCDF

mm

Yes/No

5.5

NBR

N

5.5

NBR

N

5.5

NBR

N

6.5

NBR

N

6.5

NBR

Y

6.5

NBR

Y

9

SS

Y

9

SS

Y

11

SS

Y

NBR = Nitrile Rubber; SS = Stainless Steel

Items shown with shaded background are stock sizes