This discussion revolves around finding a suitable one-piece drainable ostomy system with a reliable filter for someone with a colostomy that produces very liquid output, especially considering the presence of a hernia. The person is currently using a two-piece system but is exploring one-piece options for a better fit over the hernia. Here are some insights and advice shared in the conversation:

- The person is trying out the Hollister CeraPlus and Coloplast SenSura Mio Flip one-piece systems, which are designed to accommodate hernias better.
- They are looking for recommendations on other brands or products that might offer a more reliable filter for liquid output.
- A one-piece system is preferred for its ability to conform better over the hernia, although it makes "burping" gas more challenging.
- They have ordered Osto EZ Vent add-on vents to test with both their current two-piece system and the Coloplast one-piece pouches.
- Feedback on the Osto EZ Vent suggests it works as intended, but the small opening requires firm pressure to release gas. It might be considered if they switch fully to a one-piece system.
- After trying different products, including Hollister CeraPlus, Coloplast SenSura Mio Flip, and Convatec Natura Plus, they found that filters on all three systems clogged quickly.
- They decided to stick with the Convatec Natura Plus two-piece drainable system, as it allows for manual venting when the filter blocks.
- The SenSura Mio Flip filter worked but the pouch only lasted a day before leaking, even with barrier rings and strips.
- The Osto EZ Vent was found to be more trouble than it was worth.
- Ultimately, they returned to using Convatec, opting for drainable bags instead of closed-end ones.

Additional advice and insights from the community include:

- Many find built-in pouch filters unreliable for liquid output, as they tend to clog or allow liquid and odor to wick through. Regularly "burping" the pouch is often seen as a simpler and more reliable solution.
- Users of Hollister and Convatec two-piece systems report similar issues with filters and prefer to manually vent gas.
- Coloplast two-piece pouches are noted to be more difficult to burp compared to Convatec.
- Even "new & improved" filters are susceptible to failure once wet, often lasting only a day or two.
- For a controlled venting option without opening the coupling, the Osto EZ Vent stick-on valve is recommended. It fits most pouch brands and has been confirmed effective, though it requires firm squeezing to release gas.