Hello mate, i was tinkering with your mod and found an issue:
If there's a pipe already layed the pump won't autoconnect
(fixed in control.lua by storing all placeholder infos in variables and destroying it BEFORE creating the electric pump)

Also, this can be added to the entity block to add water reflection

water_reflection =
{
pictures =
{
filename = "base/graphics/entity/offshore-pump/offshore-pump-reflection.png",
priority = "extra-high",
width = 132,
height = 156,
shift = util.by_pixel(0, 19),
variation_count = 4,
scale = 1,
},