There is disclosed a modular, linearly actuated high-pressure pump for use in various applications with high-pressure fuel systems, in particular liquid cryogenic fuels such as Natural Gas, Hydrogen, Nitrogen and Argon (LNG/LH2/LN2/LAR). The pump utilizes linear actuation which smooths out the power profile. There are no dynamic seals which prevents failure from leakage. The primary benefit of a smooth, no pulse output and lack of dynamic seals is a longer life of the pump. Marine fuel systems that utilize cryogenic LNG are a primary application.

A condensate pump assembly comprising: a housing having an inlet port, a reservoir arranged to receive liquid through the inlet port, and an outlet port having an outlet assembly mounted thereto, a pump arranged to pump liquid from reservoir to the liquid outlet assembly, and a pair of clips releasably connectable to the housing at a first pair of mounting portions and a second pair of mounting portions, wherein each of the pair of clips has a first portion for connecting to a first external element and a second portion for connecting to a second external element, wherein the pair of clips are configured to mount the housing to the first external element when connected to the first pair of mounting portions, and wherein the pair of clips are configured to mount the housing to the second external element when connected to the second pair of mounting portions.