1. the seal is gone,( X$ N& J+ p5 V% f% E3 U
2. the connector of pipes is loose or fell apart.2 R& X# b# M2 r; ~6 F7 i' T
3. some where is blocked or clogged, the water sucked back.% o* J5 d& n; m. a! T
2 c5 z" W( J! m$ P
Post by microsoft666;2369259 + T* P' A3 S1 L! y/ Y 没有朋友懂吗?
1. the seal is gone, . S+ H! e+ |, Q1 w! @) |2. the connector of pipes is loose or fell apart. 1 O" p w2 ~0 t0 L _ W3. some where is blocked or clogged, the water sucked back.8 f' D k. }7 g! n) s+ _4 P