This topic is about finding a place to buy 4 x 2 x 12-inch ostomy pouch liners, which someone has been using since 2007 and finds very effective. They are now having trouble finding a source to purchase them and are seeking advice from the community.

Here are some helpful insights and advice shared by others:

1. Purpose of Liners:
- Liners are particularly useful when used inside a sealed, non-drainable pouch. They allow you to remove just the liner after one use, instead of discarding the entire pouch, which can save a lot of money.
- If you are using a drainable two-piece system, some people question the benefit of liners, as removing them might be messier and add an extra step to your routine.

2. Sewer and Disposal Concerns:
- There are concerns about flushing liners, as they might clog sewer lines. If you use liners, it is generally better to dispose of them in the trash.

3. Product Compatibility and Sourcing Tips:
- Pouch liners from different manufacturers can usually be used interchangeably, as long as the liner’s opening matches the barrier opening. The external shape should fit the outer pouch.
- You can check online marketplaces like AliExpress and Amazon for these liners. AliExpress often offers inexpensive options, while Amazon might resell these items at higher prices.