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making boating better
for boaters

Big Orange OEM Filter

  • Big Orange OEM Filter


Hard to decide? Ask your friends :)

After many requests from Four Winns, Carver, Cruisers Yachts, and Sea Ray owners that have boats with factory fitted disposable filters, we now offer a new filter. This latest offering is a reusable, direct replacement for the disposable Sealand Sanigard Part # 309310001 (5/8" fittings). The Big Orange OEM Replacement filter offers the same great features as the Big Orange "Original", a refillable cartridge and a filter bypass valve.


Big Orange OEM Filter is a reusable, more environmentally friendly, alternative to the disposable Sealand SaniGard filter that come as factory equipment on many newer boats. The Big Orange OEM Filter is a direct replacement, meaning that it fits in the same bracket and uses the same hose fittings as the Sealand P/N 309310001.



When the disposable filter on your boat stops working because all of the holes in the carbon pellets have been filled, you must go out and buy a whole new filter!

Instead, Big Orange OEM holding tank vent filter has been designed to have a refillable filter chamber. This means that when the carbon pellets have been all used up you only need to buy a refill pack (at a much lower price) and refill the filter.


A potential danger of traditional vent line filters is that your holding tank could collapse when being pumped out. This happens because as the waste in your holding tank is removed, air must enter the holding tank. The way the air comes in is through the vent line.

Since the air needs to go through the filter, it is not able to come in as quickly as the pump is removing stuff from the tank. This causes the pressure to become unbalanced and the holding tank will collapse. It’s as if you were to suck the air out of a plastic pop bottle. When you suck the air out you decrease the pressure inside of the bottle, causing it to collapse.

Big Orange OEM reduces this possibility by including a special by-pass valve to effectively "turn off" the filter so that you can empty the holding tank with no chance of collapse due to filter restriction.


Big Orange OEM has been designed to be quickly and easily installed with minimal hassle. Big Orange OEM uses your existing mounting bracket and hose fittings. Just unscrew the fittings, pop the old filter out of the mounting bracket and replace it with the Big Orange OEM, screw the hose fittings on to the new filter and your ready to go boating!

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