FEATURES:
The Attwood water-resistant 90° fuel tank vent is designed for
permanently-installed fuel systems and is intended for use with
5/8" vent hose. Hull thickness should be 9/16" maximum.
The unique design helps to avoid ingestion of water into the fuel tank
under normal sea conditions and washdown.
The design includes a series of baffles and traps to allow air to move
freely while reducing the possibility of water splashing back into the tank.
Eliminates the need for an anti-siphon loop in the vent hose and allows
a more direct routing of the hose to the fuel tank requiring less hose
for installation.
Meets ABYC H-24 ventilation specifications.
U.S. Patent Nos. 4,877,152 and D,314,548
WARNING:
DO NOT INSTALL THIS VENT IN A LOCATION LOWER THAN
THE TOP OF THE FUEL TANK. IT MAY ALLOW FUEL TO ESCAPE
CREATING A FIRE HAZARD.
Water-Resistant,
90° Fuel Tank Vent
1670, 1671, 1680, 1682, 66419
Mounting Instructions
Attwood marine hardware, navigational lighting, bilge pumps, and
other marine accessories are specified more than any other brand
by America’s best-known boat manufacturers as original equipment.
Look to Attwood for quality replacement parts and marine accessories.
SAVE THESE INSTRUCTIONS
Form Number 69252 Rev. G 04-11
3
®
TOOLS AND MATERIALS REQUIRED FOR INSTALLATION:
1. Drill
2. 3/4" drill bit
3. Silicone (RTV) sealant
4. Ruler or tape measure
MOUNTING INSTRUCTIONS:
1. Select a location that is the highest point possible above the top
of the fuel tank as installed in the boat under normal operating
conditions. Install as high and as far forward toward the helm as
practical. It is important that the vent is in a location where it will
not be submerged or exposed to constant wave action or splashing.
MAKE SURE THERE IS ENOUGH ROOM INSIDE THE HULL
FOR THE VENT AND HOSE BEFORE DRILLING THE MOUNTING
HOLE (See applicable figure below). Hull thickness should be
9/16" maximum.
2. Carefully drill a 3/4" diameter hole for installation of the vent. Keep
the hole clear of burrs and fiberglass strands.
3. Remove the cover retainer from trim cover. Remove trim cover,
vent body and gasket from P-trap body.
4. Apply a small bead of silicone (RTV) sealant on the P-trap body
front flange. No sealant is required on the vent body.
5. Put gasket onto threaded area of vent body. Insert vent body into
predrilled hole from outside of hull and screw into the P-trap body,
making sure the hose fitting is pointing down.
CAUTION:
Overtightening will damage the plastic threads.
6. Reinstall the trim cover and cover retainer. Make sure cover
retainer is fully seated. A coin or flat washer may be used to
tighten the retainer.
7. Using a corrosion-resistant clamp, install vent hose to hose fitting.
Figure 1a
Figure 1
•1670-Black Plastic
•1671-White Plastic
•66419-Black Plastic Body with
Stainless Steel Trim Cover
Tr im Cover
Cover RetainerVent Body
3/4" Hole Dia.
Outside of Hull
Gasket
Body
1-1/2"
Clearance
Apply Silicone
(RTV) Sealant
to Flange
Hose Fitting
(Pointing Down)
•1680-Black Plastic
•1682-Black Plastic Body with
Stainless Steel Trim Cover
Tr im Cover
Cover RetainerVent Body
3/4" Hole Dia.
Outside of Hull
Gasket
Body
1-1/2"
Clearance
Apply Silicone
(RTV) Sealant
to Flange
Hose Fitting
(Pointing Down)
© 2004 Attwood Corporation
1016 N. Monroe Street, Lowell, MI 49331-0260 www.attwoodmarine.com
(2 pages)
(6 pages)
(2 pages)
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