没有排污口的热水器怎样清理（小型热水器没有排污口怎么清洗）

{"rich_content":{"text":"","spans":null},"video":{"vid":"v028b0250000bv0j2dqq8ujbjsk76elg","duration":509.168,"width":1084,"height":540,"file_size":37011470,"thumb":{"web_uri":"tos-cn-p-0000/8d50205e3fb34e9c95c59f18842ecd26","width":724,"height":360,"image_type":null,"mimetype":null,"encrypt_web_uri":null,"secret_key":null,"encrypt_algorithm":null,"extra":null},"video_size":{"high":{"duration":509.168,"file_size":35712743,"w":964,"h":480},"normal":{"duration":509.168,"file_size":26640848,"w":724,"h":360},"ultra":{"duration":509.168,"file_size":41841684,"w":1084,"h":540}},"is_encrypted":null,"sp":null,"md5":"4f7213aaa0bcdf7711a3b7eb803314bd","tos_key":null,"secret_key":null,"encrypt_algorithm":null,"extra":null}},