Vented Loops
Installing one of our vented loops will ensure that fluids will not siphon
from tank to tank. Vented loops are commonly used in the maringe toilet
system and engine cooling system. The simple valve system incorporated in
the top of the loop allows air to enter the line when not in use, yet effectively
seals as water or other fluid passes through. Molded in Marelon®,
neither vent nor loop will corrode. The duckbill one way valve is designed
to seal properly if particular matter is present in fluids. The new MF-846
vent barb assembly option can be used in lieu of the standard MF-841 cap/duckbill.
This option allows venting to the outside of the hull via a 1/4" (6.35mm)
hose.

Part No. |
Model No. |
Barb Size |
Height |
Width |
Retail |
903000 |
MF 840 |
1-1/2" (38.10mm) |
5-1/4" (133.35mm) |
7-3/4" (196.85mm) |
$31.15 |
903001 |
MF 842 |
3/4" (19.05mm) |
4-1/2" (114.30mm) |
3-3/4" (95.25mm) |
$27.85 |
903002 |
MF 841 |
Vent Cap Assembly |
|
|
$8.90 |
903003 |
MF 843 |
5/8" (15.87mm) |
4-1/2" (114.30mm) |
4" (101.60mm) |
$37.85 |
903004 |
MF 846 |
Vent Barb Assembly |
|
|
$7.25 |
903008 |
MF-845 |
1/2" (12.70mm) |
5-1/4" (133.35mm) |
4-1/4" (107.95mm) |
$34.50 |
903007 |
MF 844 |
1" (25.40mm) |
7" (177.80mm) |
9" (228.60mm) |
$40.05 |
903009 |
MF-847 |
1-1/8" (28.57mm) |
7" (177.80mm) |
9" (228.60mm) |
$40.05 |
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