When Removing artifacts are left.

https://ibb.co/RzphcFb

Thanks for the report!
Can you reproduce this?
Did you at any point had Configurable Valves installed with the Valves mod?

ill check....Its just called valves but It says it is based off Configurable Valves code. The one from your dependencies.

Yeah I know, I created both valve mods :) I'm asking if you had it installed at any point.

I want to fix this soon, but if you still have those artefacts lying around you can use this command to clean them. It will disable achievements.

/c
local gauges = {"valves-guage-input", "valves-guage-output"}
local valves = {"valves-overflow", "valves-top_up", "valves-one_way"}
local count = 0

for _, surface in pairs(game.surfaces) do
    for _, guage in pairs(surface.find_entities_filtered{name = gauges}) do
        if 0 == surface.count_entities_filtered{position=guage.position, name=valves} then
            guage.destroy()
            count = count + 1
        end
    end
end
game.print("Cleaned up "..count.." entities")

This should be fixed in the latest release of the Valves mod.