We just bought 2 of these filters which side is vent and which is tank side ?

I bought one as well and there were no flow directional markings. I contacted the seller and they replied back with the following answer " you can install it in any direction". I'm skeptical, but will return if it doesn't work.

Hello, is this filter an exact replacement for the Sealand Sanigard part# 309310001?

This filter fits and does the job. It fits the connectors and provides the odor filter necessary, however with any overfill, the filter must be replaced b

Hola funciona para yate sea ray sundancer 41 ft2001

Si. Tengo una 340 del 2004 y tienen el mismo "holding tank".

If water enters this filter is it still effective?

the answer is after water enters it is no good

Holding Tank Vent Filter - Direct Generic Replacement for: Dometic, SeaLand, ECO, SaniGuard, Marine Holding Tank Vent Filter, 309311002 309310002 (5/8" vent hose with 3/4" GHT connectors)

Product ID: 311111633

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Details

Brand
yachtZmarine
Colour
Silver
Item dimensions L x W x H
40.6 x 7.6 x
Material
Activated
Size
5/8 inch

🔧Direct snap-in replacement

🛡️2-3x activated carbon power

🛥️5/8" vent hose fit

Description

🛥️ Breathe Easy on the Water — Say Goodbye to Stinky Boat Vents!

EFFORTLESS INSTALLATION - Snaps directly into your existing mounting brackets—no extra parts or tools needed.
PRECISION FIT FOR 5 8 VENTS - Designed specifically for 5/8" vent hoses with standard 3/4" GHT connectors—no guesswork.
ODOR FREE SAILING GUARANTEED - Eliminates foul marine holding tank odors with premium catalytic activated carbon.
TRUSTED QUALITY FAMILY OWNED - Backed by a small USA family business with a hassle-free warranty and full refund promise.
COST EFFECTIVE MARINE ESSENTIAL - Marine-store performance at a fraction of the price—join 550+ satisfied customers.

The yachtZmarine Holding Tank Vent Filter is a direct replacement filter compatible with Dometic, SeaLand, ECO, and SaniGuard systems, designed for 5/8" vent hoses with 3/4" GHT connectors. Featuring catalytic activated carbon that is 2-3 times more effective at neutralizing sewage odors, it installs effortlessly by snapping into existing mounts. Manufactured with quality and backed by a family-owned USA business, it offers marine-grade odor control at a competitive price with a satisfaction guarantee.

Specifications

ASIN	B091V476FT
Batteries Included?	No
Brand	yachtZmarine
Color	Silver
Customer Reviews	4.5 4.5 out of 5 stars (551)
Date First Available	9 April 2021
Manufacturer	MMXX Holdings, Inc.
Material Type	Activated Carbon
Number of Pieces	1
Product Dimensions	40.64 x 7.62 x 7.62 cm; 689 g
Size	5/8 inch
connector-type	GHT

Reviews

A**Y

Perfect fit. Good price.

22.07.2025

N**E

works just as well as the ones at the marine stores but much cheaper

23.10.2025

A**E

Artikel wie beschrieben, schnell Versand und gut verpackt. Gerne wieder!

6.11.2025

S**.

Passt perfekt.

26.05.2025

K**T

Filter cylinder functions as intended, and installation/replacement is simple.

26.08.2025

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