S312, 02S404 manja osinthika komanso olimba osalowa madzi
Manja a S312, 02S404 osalowa madzi amagwiritsidwa ntchito makamaka pansi pamikhalidwe yogwirira ntchito pomwe pamakhala kugwedezeka kapena kufunikira kopanda madzi pamalo pomwe payipi imadutsa khoma. Kumbali imodzi, imathandizira kukhazikitsa ndi kuchotsa mapaipi, komanso anti seepage ndi anti leakage; kumbali ina, Imatetezanso nyumba zowonongeka chifukwa cha madzi ndi kugwedezeka.