At SRO, several members had talked about refilling their holding tank vent filters. I recently did mine, and it saved about $100 bucks. I had been buying the filter from the manufacturer, because the larger size is not usually stocked anywhere else. http://www.environmentalmarine.com/accessories.html
Here's how to do it yourself, step-by-step:
First, purchase your pvc (dwv) fittings for 2" pipe, primer & glue, and the carbon pellets (the pellets can be found at PetSmart for under $5 -900ml):
Then, cut the vent filter in half using a hack saw:
Empty the old pellets, and remove the sponge retainer pads by pushing them out from the ends. You can wash the pads and let them dry for reuse:
Remove 1" of the label (with a razor knife) where you will be gluing the new fittings on. Then install the fittings with the primer and glue. Let this cure before adding the new pellets:
Place the pads back into the ends and fill the two halves completely with new carbon pellets, and screw the two halves together using teflon tape:
Options: You could use a no-hub fitting instead of the glue-on fittings that I used (that's the rubber tube with clamps).
You could replace the 30 ppi foam retaining pads with new foam: PetSmart has 30 ppi filter pads of the same thickness that you could cut them out of. However, I found the existing foam to be fine.
You could even make the whole thing if you do not already use a vent filter. The pipe is 14" long. The only thing missing in the pics above is this retaining wire screen stuffed in the ends first:
-Ken
Here's how to do it yourself, step-by-step:
First, purchase your pvc (dwv) fittings for 2" pipe, primer & glue, and the carbon pellets (the pellets can be found at PetSmart for under $5 -900ml):
Then, cut the vent filter in half using a hack saw:
Empty the old pellets, and remove the sponge retainer pads by pushing them out from the ends. You can wash the pads and let them dry for reuse:
Remove 1" of the label (with a razor knife) where you will be gluing the new fittings on. Then install the fittings with the primer and glue. Let this cure before adding the new pellets:
Place the pads back into the ends and fill the two halves completely with new carbon pellets, and screw the two halves together using teflon tape:
Options: You could use a no-hub fitting instead of the glue-on fittings that I used (that's the rubber tube with clamps).
You could replace the 30 ppi foam retaining pads with new foam: PetSmart has 30 ppi filter pads of the same thickness that you could cut them out of. However, I found the existing foam to be fine.
You could even make the whole thing if you do not already use a vent filter. The pipe is 14" long. The only thing missing in the pics above is this retaining wire screen stuffed in the ends first:
-Ken