WP305M Mitsubishi Outflow pipe size Home › Forums › Public Forums › General Plumbing › WP305M Mitsubishi Outflow pipe size This topic has 1 reply, 2 voices, and was last updated 24 years ago by SylvanLMP. Viewing 1 reply thread Author Posts 16 Jan 2001 at 2:29 am #274420 Ravinder Vashisht I store water here for when the water supply fails here in Thailand. WP305M pump makes a strangled noise and some times cuts off. I think the out flow pipe is too small. What diameter pipe should there be on the outflow?Phil 16 Jan 2001 at 2:33 am #289723 SylvanLMPParticipant What did the Manufacturers specifications SUGGEST according to TOTAL DISCHARGE HEAD (TDH) Author Posts Viewing 1 reply thread You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In