3.应及时排除管道中的积气。当空气进入减压管网或管网内随压力变化时气体从水中析出，这时区域内用户的水压极不稳定；处在供水不利点用水器更是压力变化急骤，有时呈现虚假的峰值压力，有时还会抽吸断水，还有管网会伴随撞击声。产生这种现象，会影响燃气热水器、电热水器等稳定工作，严重时会被毁坏；对各种盥洗器具的进水连接管破坏力也很大，因此爆管的事件屡有发生；有些水表无法正确计量，出现用户不用水，水表也会不断地转动。为杜绝这类事故，应检查屋顶水箱生活给水总管的蓄水高程是否满足，如不满足水箱出水口处会产生水旋，吸入空气。排除这一故障可调整水箱内液位控制器的低水位高程，经验表明一般低水位距出水口应不小于0.3m。也可反复开启设置在分区、减压系统两侧的压力表放气旋塞，把已进入管网内的空气徐徐排出。如采取上述措施后，在分区总管末梢以下的一些用水器还出现上述现象，可以在这些部位增设自动排气装置。
台湾北部精机Northman电液比例先导溢流阀
EDG-01,EDG-01-H,EDG-01-C,EDG-01-B.
EDG-01,EDG-01-H-T,EDG-01-C-T,EDG-01-B-T
台湾北部精机Northman电液比例溢流阀EBG-03,EBG-06,EBG-10,
EBG-03-C,EBG-03-H,EBG-06-C,EBG-06-H,EBG-10-C,EBG-10-H,
EBG-03-C-T,EBG-03-H-T,EBG-06-C-T,EBG-06-H-T,EBG-10-C-T,EBG-10-H-T.
台湾北部精机Northman电液比例溢流调速阀
EFBG-03-125,EFBG-06-250,EFBG-06-500,EFBG-10-500,
EFBG-03-125-C,EFBG-03-125-H,
EFBG-06-125-C,EFBG-06-125-H,
EFBG-06-250-C,EFBG-06-250-H,
EFBG-06-500-C,EFBG-06-500-H,
EFBG-10-500-C,EFBG-10-500-H.
台湾Northman电磁换向阀SWH-G02-C2-D24-10
台湾Northman电磁换向阀SWH-G02-C2M-D24-10
台湾Northman电磁换向阀SWH-G02-C22M-D24-10
台湾Northman电磁换向阀SWH-G02-C23-D24-10
台湾Northman电磁换向阀SWH-G02-C3-D24-10
台湾Northman电磁换向阀SWH-G02-C3M-D24-10
台湾Northman电磁换向阀SWH-G02-C4-D24-10
台湾Northman电磁换向阀SWH-G02-C4M-D24-10
台湾Northman电磁换向阀SWH-G02-C40-D24-10
台湾Northman电磁换向阀SWH-G02-C40M-D24-10
台湾Northman电磁换向阀SWH-G02-C48-D24-10
台湾Northman电磁换向阀SWH-G02-C48M-D24-10
台湾Northman电磁换向阀SWH-G02-C5-D24-10
台湾Northman电磁换向阀SWH-G02-C6-D24-10
台湾Northman电磁换向阀SWH-G02-C6M-D24-10
台湾Northman电磁换向阀SWH-G02-C60-D24-10
台湾Northman电磁换向阀SWH-G02-C60M-D24-10
力士乐比例阀部分型号：
R900573294 DBE6-10/315G24NK4M
R900617483 DBE6-10/200YG24K4V
R900716552 DBE6-10/200G24K4V
R900741477 DBE6-10/200YG24K4M
R900916045 DBE6-10/315YG24NK4M
R900916046 DBE6-10/50G24NK4M
R900916047 DBE6-10/200G24K4M
R900916048 DBE6-10/200G24NK4M
R900916244 DBE6-10/100YG24NK4M
R900924428 DBE6-10/100G24NK4M
R900936001 DBE6-10/200YG24NK4M
R900938004 DBE6-10/315YG24NK4V
R900943833 DBE6-10/315YG24K4M
R900945295 DBE6-10/350G24NK4M
R900959519 DBE6-10/350YG24NK4M
R901157255 DBE6-10/50G24NK4V
R900546986 DBEE6-10/315G24K31M
R900546987 DBEE6-10/315YG24K31M
R900556310 DBEE6-10/200YG24NK31M
R900715251 DBEE6-10/200G24NK31V
R900743106 DBEE6-10/315YG24K31V
R900940726 DBEE6-10/50G24K31V
R900940727 DBEE6-10/315G24K31V
R900948803 DBEE6-10/100G24K31M
R900950005 DBEE6-10/315YG24NK31M
R900952490 DBEE6-10/200G24K31M
R900954432 DBEE6-10/50YG24K31M
R900954433 DBEE6-10/200YG24K31M
R900705197 3DREME10P-6X/315YG24K31V
R900961474 3DREME16P-6X/200YG24K31V
R900964169 3DREME16P-6X/200XYG24K31V
R900977647 3DREME10P-6X/200YG24K31V
R901026376 3DREME10P-6X/200XYG24K31V
R901103660 3DREME10P-6X/315XYG24K31V
R901165931 3DREME16P-6X/200YG24K31V-10
R901218097 3DREME10P-7X/200YG24K31F1V
R901229977 3DREME10P-7X/200XYG24K31A1V
R900948621 3DREE10P-6X/200YG24K31V
R900954517 3DREE10P-6X/100YG24K31V
R900954523 3DREE16P-6X/200YG24K31V
R900942951 3DREM10P-6X/200YG24K4V-1
R900943631 3DREM10P-6X/315YG24K4V-1
R900964518 3DREM10P-6X/315YG24K4V
R900769060 3DREM16P-6X/250XYG24K4V-2
R900948950 3DREM16P-6X/200YG24K4V-1
R900949125 3DREM16P-6X/200XYG24K4V-1
R900950403 3DREM16P-6X/100YG24K4V-1
R900958861 3DREM16P-6X/200YG24K4V
R900244331 3DRE10P-6X/315YG24K4V
R900942975 3DRE10P-6X/200YG24K4V-1
R900943090 3DRE10P-6X/200XYG24K4V-1
R900950303 3DRE10P-6X/100YG24K4V-1
R900705140 3DRE16P-6X/200YG24K4V