usually its cause by un-properly vented air bubble.
http://www.amazon.com/s/ref=nb_*****_noss_1?url=search-alias%3Daps&field-keywords=Water+Hammer+Arrestor
• 謝班長。 -08明前茶- ♀ (0 bytes) () 07/19/2012 postreply 14:24:26