Iyi pombi yemvura inopa mushandisi nzira yekusefa nenzira yemapercolators maviri.
Kana wafemerwa, utsi hunosefa uye hwotonhodzwa kana hukashandiswa pamwe chete neaizi-catcher.
Mavara akashinga ari pamusoro pemuromo uye nechepasi pepombi anowedzera kukwezva uye kukwezva kwepombi.