The most epickest script ever!!1111! It makes everything liquid (you have to restart TPT to undo it). It can be run in the console.

Edit: Actually makes everything liquid now, but has to be run as a file

--https://stackoverflow.com/a/32387452 code by ryanpattison
local mask = tonumber("11111111111111111111111111100000",2);

function bitand(a, b)
    local result = 0
    local bitval = 1
    while a > 0 and b > 0 do
      if a % 2 == 1 and b % 2 == 1 then -- test the rightmost bits
          result = result + bitval      -- set the current bit
      end
      bitval = bitval * 2 -- shift left
      a = math.floor(a/2) -- shift right
      b = math.floor(b/2)
    end
    return result
end

for n,p in pairs(tpt.el) do
	--[[local props = p.properties;
	if props % 16 == 0 then
		props = props - 14
	elseif props % 8 == 0 then
		props = props - 6
	elseif props % 4 == 0 then
		props = props - 2
	elseif props % 2 == 1
		then props = props + 1
	end;
	tpt.el[n].properties = props;
	]]
	tpt.el[n].properties = bitand(tpt.el[n].properties,mask) + 2;
	tpt.el[n].falldown = 2;
	if tpt.el[n].gravity == 0 then
		tpt.el[n].gravity = tpt.el.glow.gravity
	end;
	if tpt.el[n].loss == 0 then
		tpt.el[n].loss = tpt.el.oil.loss
	end;
	if tpt.el[n].airdrag == 0 then
		tpt.el[n].airdrag = tpt.el.oil.airdrag
	end;
	if tpt.el[n].diffusion > 1 then
		tpt.el[n].diffusion = 1
	end
end