[Bunyip]

This post is directed at people using the above pump. I had a conversation with the dealer who sold me the above pump and they said it is best if I used 1.5" piping in the outlet rather than 2" piping. His reasoning is that there will be too heavy a head of water with 2" piping. Is that true? I presume if it is feeding a shower and hence not under pressure, that would not be the case. Is there any comparison out there of flow through 1.5" and 2" piping for these pumps? Any help appreciated.