Pulasitiki drainage board amapangidwa ndi polystyrene (HIPS) kapena polyethylene (HDPE) ngati zopangira.Popanga, pepala lapulasitiki limasindikizidwa kuti likhale lopanda kanthu.Mwanjira iyi, bolodi la drainage limapangidwa.
Imatchedwanso concave-convex drainage plate, drainage protection plate, garage denga drainage plate, drainage plate, etc. Imagwiritsidwa ntchito makamaka ngati ngalande ndi kusungirako konkire yoteteza wosanjikiza padenga la garaja.Pofuna kuonetsetsa kuti madzi owonjezera padenga la garaja amatha kutulutsidwa pambuyo pobwezeretsa.Angagwiritsidwenso ntchito ngati ngalande ngalande.