Dear sir,
these are the two types of filters made out of plastic and metal water from source is need to be filtered otherwise there will be clogging so these filters are placed.
If you are planning on using inline drippers then it is advisable to go in for disc filters rather than screen filters.
Disc filters are easy to maintain and are not subjected to wear and tear of screen filters. In the case of inline drippers you risk the possiblity of blockage if the mesh on the screen filter is damaged. So Disk filters is worth the investment.
